研究者紹介システム
| 東 哲司 |  |
| アズマ テツシ | |
| 大学院農学研究科 資源生命科学専攻 | |
| 教授 | |
| 農学関係 |
研究者情報
所属
【主配置】
大学院農学研究科 資源生命科学専攻【配置】
農学部 資源生命科学科
学位
授業科目
- 生物資源と農業Ｂ, 国際教養教育院, 2021
- 特定課題演習 I-1, 大学院農学研究科, 2021
- 課題開発演習, 大学院農学研究科, 2021
- 資源生命科学プレゼンテーション演習Ⅰ（オーラル・ペーパー）, 大学院農学研究科, 2021
- 特定課題演習 II-1, 大学院農学研究科, 2021
- 熱帯植物生理学, 大学院農学研究科, 2021
- 特定課題演習 I-2, 大学院農学研究科, 2021
- 資源生命科学プレゼンテーション演習Ⅱ（オーラル・ペーパー）, 大学院農学研究科, 2021
- 特定課題演習 II-2, 大学院農学研究科, 2021
- 資源植物開発論, 大学院農学研究科, 2021
- 高度教養セミナー農学部応用植物学入門, 農学部, 2021
- 高度教養セミナー農学部応用植物学入門, 農学部, 2021
- 高度教養セミナー農学部応用植物学, 農学部, 2021
- 卒業研究, 農学部, 2021
- 資源生命科学入門Ⅱ, 農学部, 2021
- 資源生命科学入門Ⅱ－１, 農学部, 2021
- 応用植物学専門実験 I, 農学部, 2021
- 食用作物学１, 農学部, 2021
- 食用資源植物学１, 農学部, 2021
- 熱帯有用植物学１, 農学部, 2021
- 食用作物学, 農学部, 2021
- 初年次セミナー（応用植物学コース）, 農学部, 2021
- 資源生命科学入門Ⅱ－２, 農学部, 2021
- 食用作物学２, 農学部, 2021
- 食用資源植物学２, 農学部, 2021
- 熱帯有用植物学２, 農学部, 2021
- 植物資源学, 農学部, 2021
- 応用植物学基礎実験, 農学部, 2021
- 応用植物学専門実験 II, 農学部, 2021
- 植物成長生理学１, 農学部, 2021
ジャンル
コメントテーマ
研究活動
研究分野
論文
- Informa UK Limited, 2023年01月01日, Plant Production Science, 1 - 11
[査読有り]
研究論文（学術雑誌）
Frost injury is a concern in early-sown spring wheat (Triticum aestivum) in the Tokai region of Japan. To assess the efficacy of ground rolling as a technique for avoiding frost injury, we investigated its effects on the apical development and yield of 'Ayahikari' spring wheat. In both 2018-19 and 2019-20, rolling delayed spikelet initiation by 4-5 days, the start of internode elongation by 5-12 days, and jointing by 3-9 days, but did not affect the apical development rate, which depended on the thermal time. Ground rolling prevented frost injury in 2018-19 but not in 2019-20, probably because the warmer-than-average winter promoted earlier jointing, and so plants were exposed to later low temperatures in February. These results suggest that ground rolling is an effective method for avoiding frost injury in spring wheat during cold winters.
TAYLOR & FRANCIS LTD, 2022年10月, PLANT PRODUCTION SCIENCE, 25 (4), 434 - 439, 英語[査読有り]
研究論文（学術雑誌）
- Informa UK Limited, 2022年07月03日, Plant Production Science, 25 (3), 350 - 358
[査読有り]
研究論文（学術雑誌）
- 2022年07月, Journal of Crop Research, 67, 51 - 55
[査読有り]
- 2022年07月, Journal of Crop Research, 67, 35 - 40
[査読有り]
Abstract Triacylglycerols (TAGs) are the major component of plant storage lipids such as oils. Acyl-CoA:diacylglycerol acyltransferase (DGAT) catalyzes the final step of the Kennedy pathway, and is mainly responsible for plant oil accumulation. We previously found that the activity of Vernonia DGAT1 was distinctively higher than that of Arabidopsis and soybean DGAT1 in a yeast microsome assay. In this study, the DGAT1 cDNAs of Arabidopsis, Vernonia, soybean, and castor bean were introduced into Arabidopsis. All Vernonia DGAT1-expressing lines showed a significantly higher oil content (49% mean increase compared with the wild-type) followed by soybean and castor bean. Most Arabidopsis DGAT1-overexpressing lines did not show a significant increase. In addition to these four DGAT1 genes, sunflower, Jatropha, and sesame DGAT1 genes were introduced into a TAG biosynthesis-defective yeast mutant. In the yeast expression culture, DGAT1s from Arabidopsis, castor bean, and soybean only slightly increased the TAG content; however, DGAT1s from Vernonia, sunflower, Jatropha, and sesame increased TAG content >10-fold more than the former three DGAT1s. Three amino acid residues were characteristically common in the latter four DGAT1s. Using soybean DGAT1, these amino acid substitutions were created by site-directed mutagenesis and substantially increased the TAG content.
Oxford University Press (OUP), 2022年03月04日, Journal of Experimental Botany, 73 (9), 3030 - 3043[査読有り]
研究論文（学術雑誌）
CO2-responsive CCT protein (CRCT) is a positive regulator of starch synthesis-related genes such as ADP-glucose pyrophosphorylase large subunit 1 and starch branching enzyme I particularly in the leaf sheath of rice (Oryza sativa L.). The promoter GUS analysis revealed that CRCT expressed exclusively in the vascular bundle, whereas starch synthesis-related genes were expressed in different sites such as mesophyll cell and starch storage parenchyma cell. However, the chromatin immunoprecipitation (ChIP) using a FLAG-CRCT overexpression line and subsequent qPCR analyses showed that the 5 '-flanking regions of these starch synthesis-related genes tended to be enriched by ChIP, suggesting that CRCT can bind to the promoter regions of these genes. The monomer of CRCT is 34.2 kDa; however, CRCT was detected at 270 kDa via gel filtration chromatography, suggesting that CRCT forms a complex in vivo. Immunoprecipitation and subsequent MS analysis pulled down several 14-3-3-like proteins. A yeast two-hybrid analysis and bimolecular fluorescence complementation assays confirmed the interaction between CRCT and 14-3-3-like proteins. Although there is an inconsistency in the place of expression, this study provides important findings regarding the molecular function of CRCT to control the expression of key starch synthesis-related genes.
WILEY, 2021年08月, PLANT CELL AND ENVIRONMENT, 44 (8), 2480 - 2493, 英語[査読有り]
研究論文（学術雑誌）
We screened 80 Asian rice (Oryza sativa L.) cultivars for the presence of the submergence-tolerance gene SUB1A-1 and the floating genes SNORKEL1 (SK1) and SNORKEL2 (SK2), and found that the deepwater rice cultivar Baisbish (BSB) and the submergence-tolerant cultivar Flood Resistant 13A (FR13A) both possess the SUB1A-1 and the SK1/2. When BSB and FR13A seedlings were completely submerged, spindly growth of shoots was induced in BSB but not in FR13A. Submergence significantly increased the SUB1A-1 transcript abundance in BSB and FR13A shoots, but the expression level in BSB was much lower than that of FR13A. Submergence also induced the expression of both ERF66 and ERF67, the transcriptional targets of SUB1A-1, in FR13A shoots, whereas it upregulated the expression of ERF67 but not that of ERF66 in BSB shoots. These results suggest that BSB could not display submergence tolerance due to the low expression of SUB1A-1 and/or ERF66 under submergence.
TAYLOR & FRANCIS LTD, 2021年07月, PLANT PRODUCTION SCIENCE, 英語[査読有り]
研究論文（学術雑誌）
- 2020年06月, Journal of Crop Research, 65, 37 - 41
[査読有り]
- 2020年06月, Journal of Crop Research, 65, 23 - 29
[査読有り]
- Informa UK Limited, 2019年12月04日, Soil Science and Plant Nutrition, 66 (2), 299 - 307
[査読有り]
研究論文（学術雑誌）
The relationship between ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and Rubisco activase (Rca) levels was studied using transgenic rice overexpressing maize Rca (OX-mRca) and knockdown transgenic rice expressing antisense Rca (KD-Rca). The ratio of Rubisco to total soluble protein was lower in OX-mRca, whereas it was higher in KD-Rca than in WT, indicating that Rca expression was negatively correlated with Rubisco content. The expressions of other Calvin–Benson–Bassham cycle enzymes such as sedoheptulose-1,7-bisphosphatase and phosphoribulokinase analyzed by immunoblotting did not show such a negative correlation with Rca, suggesting that the effect of Rca on protein expression may be specific for Rubisco. Although Rubisco content was decreased in OX-mRca, the transcript levels of the Rubisco large subunit (OsRbcL) and the Rubisco small subunit mostly increased in OX-mRca as well as in KD-Rca. Additionally, polysome loading of OsRbcL was slightly higher in OX-mRca than it was in WT, suggesting that the OsRbcL translation activity was likely stimulated by overexpression of Rca. 35S-methionine labeling experiments demonstrated that there was no significant difference in the stability of newly synthesized Rubisco among genotypes. However, 35S-methionine-labeled Rubisco was marginally decreased in OX-mRca and increased in KD-Rca compared to the WT. These results suggest that Rca negatively affects the Rubisco content, possibly in the synthesis step.
Springer Netherlands, 2018年05月30日, Photosynthesis Research, 1 - 10, 英語[査読有り]
研究論文（学術雑誌）
- Springer Science and Business Media LLC, 2018年02月, Plant Growth Regulation, 85 (1), 123 - 132, 英語
[査読有り]
研究論文（学術雑誌）
- 2018年, Plant Production Science, DOI: 10.1080/1343943X.2018.154, 英語Rubisco small subunits of C4 plants, Napier grass and guinea grass confer C4-like catalytic properties on Rubisco in rice.
[査読有り]
研究論文（学術雑誌）
- 日本作物学会, 2017年, 日本作物学会講演会要旨集, 244, 124 - 124, 日本語
- 日本作物学会, 2017年, 日本作物学会講演会要旨集, 244, 123 - 123, 日本語
- 日本作物学会, 2017年, 日本作物学会講演会要旨集, 244, 119 - 119, 日本語
- 日本作物学会, 2017年, 日本作物学会講演会要旨集, 244, 122 - 122, 日本語
The semiaquatic plants, Sagittaria trifolia and Sagittaria pygmaea, are perennial and troublesome weeds of rice paddy fields. These species mainly reproduce vegetatively via tubers, which sprout after the rice paddy fields are irrigated. Sprouting finally leads to the emergence of the shoots from the water in the paddy fields. In both species, the first internode elongates around the time of emergence and this lifts the shoot meristems in the soil, aiding in the establishment of the young plants. Therefore, elongation of the internode is a factor that determines the weed damage to rice caused by these species. In this study, the first internode elongation of both species was characterized. During emergence, S. trifolia and S. pygmaea showed distinct growth patterns. In S. trifolia, the internodes elongated before the emergence of the shoots from the water; whereas, in S. pygmaea, the internodes started to elongate only after emergence. We examined environmental prerequisites for internode elongation, and found that the internode elongation of S. trifolia was induced by submergence and was independent of the soil cover, while that of S. pygmaea required both submergence and covering. Next, we determined which gaseous factors were responsible for internode elongation. Treatment with ethylene, which enhances growth of several other aquatic and semiaquatic plants, did not stimulate internode elongation in either species under an anaerobic condition. Our results suggested that the gaseous factor stimulating internode elongation in S. trifolia and S. pygmaea may be oxygen depletion and carbon dioxide, respectively.
WILEY-BLACKWELL, 2016年12月, WEED BIOLOGY AND MANAGEMENT, 16 (4), 147 - 156, 英語[査読有り]
研究論文（学術雑誌）
The successful overwintering of water lettuce (Araceae, Pistia stratiotes L.) is reported in Kowataike, a pond in Kyoto Prefecture, Japan, in the temperate climate zone. Overwintering was observed in the northern zone of Kowataike, where warm water discharge flows from an upstream electrical appliance factory. From December 2007 to January 2008, several overwintering water lettuce plants were observed in the northern zone where the water temperature was abnormally high (average: 21.9 degrees C; low: 19.5 degrees C). Water in the central zone of Kowataike was isolated from the warm water discharge. The temperatures here were much lower (average: 8.2 degrees C; low: 4.2 degrees C) and no water lettuce plant survived here. The overwintering in the northern zone fluctuated annually. This fluctuation appeared to be correlated with the period of warm water discharge, which varied from year to year and resulted in higher water temperatures most, but not all, of the winter. The results suggest that artificial environmental factors, such as anthropogenic warm water discharge, could enable water lettuce to overwinter. In the northern zone of Kowataike under the influence of the warm water discharge, only small water lettuce plants overwintered. This may be attributed to the presence of older plants with larger leaves that seemed to protect the small rosettes from frost. Second, the air warmed by the warm discharge accumulated in the space under the piles of dead large leaves, which created conditions similar to those of a greenhouse. These two mechanisms apparently allow the small water lettuce plants to be surrounded by moderate atmospheric conditions.
WILEY-BLACKWELL, 2015年03月, WEED BIOLOGY AND MANAGEMENT, 15 (1), 20 - 26, 英語[査読有り]
研究論文（学術雑誌）
The Amazonian wild rice Oryza grandiglumis has two contrasting adaptation mechanisms to flooding submergence: a quiescence response to complete submergence at the seedling stage and an escape response based on internodal elongation to partial submergence at the mature stage. We investigated possible factors that trigger these responses. In stem segments excised from mature O. grandiglumis plants, complete submergence only slightly promoted internodal elongation with increased ethylene levels in the internodes, while partial submergence substantially promoted internodal elongation without increased ethylene levels in the internodes. Incubation of non-submerged stem segments under a continuous flow of humidified ethylene-free air promoted internodal elongation to the same extent as that observed for partially submerged segments. Applied ethylene had little effect on the internodal elongation of non-submerged segments irrespective of humidity conditions. These results indicate that the enhanced internodal elongation of submerged O. grandiglumis plants is not triggered by ethylene accumulated during submergence but by the moist surroundings provided by submergence. The growth of shoots in O. grandiglumis seedlings was not promoted by ethylene or complete submergence, as is the case in O. sativa cultivars possessing the submergence-tolerant gene SUB1A. However, because the genome of O. grandiglumis lacks the SUB1A gene, the quiescence response of O. grandiglumis seedlings to complete submergence may be regulated by a mechanism distinct from that involved in the response of submergence-tolerant O. sativa cultivars. (C) 2014 Elsevier GmbH. All rights reserved.
ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2015年02月, JOURNAL OF PLANT PHYSIOLOGY, 174, 49 - 54, 英語[査読有り]
研究論文（学術雑誌）
- 日本作物学会, 2015年, 日本作物学会講演会要旨集, 240, 84 - 84, 日本語
- 日本作物学会, 2015年, 日本作物学会講演会要旨集, 240, 28 - 28, 日本語
- 日本作物学会, 2015年, 日本作物学会講演会要旨集, 240, 30 - 30, 日本語
In Asian cultivated rice (Oryza sativa), distinct mechanisms to survive flooding are activated in two groups of varieties. Submergence-tolerant rice varieties possessing the SUBMERGENCE1A (SUB1A) gene display reduced growth during flash floods at the seedling stage and resume growth after the flood recedes, whereas deepwater rice varieties possessing the SNORKEL1 (SK1) and SNORKEL2 (SK2) genes display enhanced growth based on internodal elongation during prolonged submergence at the mature stage. In this study, we investigated the occurrence of these growth responses to submergence in the wild rice species Oryza grandiglumis, which is native to the Amazon floodplains. When subjected to gradual submergence, adult plants of O. grandiglumis accessions showed enhanced internodal elongation with rising water level and their growth response closely resembled that of deepwater varieties of O. sativa with high floating capacity. On the other hand, when subjected to complete submergence, seedlings of O. grandiglumis accessions displayed reduced shoot growth and resumed normal growth after desubmergence, similar to the response of submergence-tolerant varieties of O. sativa. Neither SUB1A nor the SK genes were detected in the O. grandiglumis accessions. These results indicate that the O. grandiglumis accessions are capable of adapting successfully to flooding by activating two contrasting mechanisms as the situation demands and that each mechanism of adaptation to flooding is not mediated by SUB1A or the SK genes.
SPRINGER, 2014年09月, PLANTA, 240 (3), 459 - 469, 英語[査読有り]
研究論文（学術雑誌）
Gravitropic curvature of pulvini of wheat and oat stem segments gradually declined with decreasing atmospheric O-2 concentration and was almost completely blocked under anoxia, whereas that of rice stem segments was enhanced under hypoxia and anoxia. Anoxia substantially increased the ethanol content in pulvini of gravistimulated stem segments in rice, wheat and oat, but the ethanol content showed no marked difference between rice pulvini and wheat and oat pulvini. The concentrations of exogenous ethanol and acetaldehyde required to inhibit the gravitropic curvature of pulvini were significantly higher in rice segments than in wheat and oat segments. However, in all three species, the concentrations of ethanol and acetaldehyde required to completely inhibit curvature were several-fold higher than the endogenous levels that accumulated in pulvini gravistimulated in N-2. The pulvini of rice segments gravistimulated in N-2 did not contain much more ATP than those of wheat or oat segments gravistimulated in N-2. When applied unilaterally to the pulvini of vertically oriented stem segments incubated in N-2, indole-3-acetic acid induced bending. in rice stem segments but not in wheat and oat stem segments. Transference of graviresponsive pulvini of rice, as well as those of wheat and oat, from aerobic conditions to anaerobic conditions led to cessation of gravitropic curvature within several minutes, but subsequently only gravitropic curvature of anoxic rice pulvini was completely recovered within 2 h. A large portion of this recovery was blocked by cordycepin, a transcription inhibitor. These results' suggested that anoxia-induced expression of any gene or genes enables rice pulvini to respond to gravistimulation under anaerobic conditions, and that such a gene or genes might be unrelated to ethanol fermentation and ATP production in anaerobic conditions. (C) 2013 Elsevier GmbH. All rights reserved.
ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2013年09月, JOURNAL OF PLANT PHYSIOLOGY, 170 (13), 1158 - 1164, 英語[査読有り]
研究論文（学術雑誌）
- 2013年, Sust Agr Res, 2, 99 - 108, 英語Striga infestation in Kenya: Status, distribution and management options
[査読有り]
研究論文（学術雑誌）
Witchweed, Striga hermonthica (hereafter, referred to as Striga), is a major biotic constraint to cereal production in sub-Saharan Africa. The parasitic plant is a socioeconomic problem that has forced some resource-poor farmers to abandon their farms due to high infestation. This study was designed in order to elucidate farmers' perceptions of Striga control measures and to determine their potential adoption in two villages in western Kenya. Participatory rural appraisals and individual interviews were conducted in 2009 and 2010 in a sample of 128 and 120 households in Kaura and Kogweno-Oriang villages in Homabay and Rachuonyo districts, respectively. The results revealed that crop production was the main occupation in most households. The farmers identified Striga as one of the major constraints to maize, sorghum, and finger millet production. According to the farmers, the most popular control measures were hand-pulling, crop rotation, and intercropping, even though rotational systems might need a longer timeframe to reduce the soil seed bank of Striga. Although the level of Striga infestation and damage were increasing in the farmers' fields, the adoption of the control options was limited. The reason for the low adoption level of the control methods by the farmers is because they are too risky as there is no guarantee of a direct pay-off in increased crop yield. Farmer-led evaluation and adaptation of the various Striga control technologies in real-life situations will facilitate the choice of appropriate options and facilitate their uptake.
WILEY-BLACKWELL, 2012年03月, Weed Biol Manag, 12 (1), 53 - 62, 英語[査読有り]
研究論文（学術雑誌）
- 日本作物学会, 2012年, 日本作物学会講演会要旨集, 234, 308 - 308, 日本語
- Response of NERICA Rice to Striga hermonthica Infections in Western Kenya
Striga hermonthica (Del.) Benth (hereafter referred to as Striga), an obligate root hemiparasite, poses a serious threat to cereal production in sub-Saharan Africa. Field experiments were conducted in two years at Alupe farm, western Kenya, to investigate the effect of Striga on growth and yield parameters of New Rice for Africa (NERICA) cultivars. A randomized complete block design replicated three times and rice cultivars NERICA 1, NERICA 4, NERICA 10, NERICA 11 and Dourado precoce, a local landrace were used. Striga significantly reduced grain yield and the yield components. Reduction in grain yield and its components were more severe under moisture stress period in 2008. Grain yield loss ranged between 33-90%. NERICA 1 gave the highest yield in the two seasons both in Striga infected and control plants. This was followed by NERICA 10, which was also the most economically viable when infected with Striga. Result showed that both NERICA 1 and NERICA 10 are resistant to S. hermonthica, while NERICA 4 is highly susceptible. (C) 2012 Friends Science Publishers
FRIENDS SCIENCE PUBL, 2012年, INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY, 14 (2), 271 - 275, 英語[査読有り]
研究論文（学術雑誌）
- 2012年, J Agr Sci, 4, 41 - 50, 英語Farmers’ perception and constraints to the adoption of weed control options: the case of Striga asiatica in Malawi
[査読有り]
研究論文（学術雑誌）
- 2011年09月, Tropical Agriculture and Development, 55, 113 - 117, 英語Involvement of Plant Hormones in the Gravitropic Response of Floating Rice Pulvini and Effect of Submergence on the Response
[査読有り]
研究論文（学術雑誌）
- 2011年09月, Tropical Agriculture and Development, 55, 108 - 112, 英語Characterization of gravitropic response of leaf-sheath pulvini in floating rice
[査読有り]
研究論文（学術雑誌）
The cell walls in the elongating zone of submerged floating rice internodes show high susceptibility to expansins. When internode sections corresponding to such an elongation zone were incubated for 24 h under osmotic stress conditions produced by treatment with 100 mM polyethylene glycol 4000 (PEG), the cell wall susceptibility to expansins remained at its initial level, while the susceptibility of internode sections incubated under unstressed conditions decreased considerably during the same period. The contents of polysaccharides and phenolic acids as ferulic, diferulic and p-coumaric acids in the cell walls of internode sections increased substantially under unstressed conditions, but the increases were almost completely prevented by osmotic stress. Ferulic acid applied to internode sections under osmotic stress reduced the susceptibility of the cell walls to expansins and increased the levels of ferulic and diferulic acids in the cell walls, with little effect on the accumulation of polysaccharides. In contrast, applied p-coumaric acid increased the level of p-coumaric acid in the cell walls without a change in the levels of ferulic and diferulic acids but did not reduce the susceptibility to expansins. These results suggest that the deposition of ferulic and diferulic acids is a primary determinant in regulating the reduction of the susceptibility of cell walls to expansins in floating rice internodes. (C) 2010 Elsevier GmbH. All rights reserved.
ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2011年01月, JOURNAL OF PLANT PHYSIOLOGY, 168 (2), 121 - 127, 英語[査読有り]
研究論文（学術雑誌）
MAP3Kδ4 (At4g23050) is a Raf-like mitogen-activated protein kinase kinase kinase (MAP3K) in Arabidopsis thaliana, classified as subgroup B2. The B2 subgroup MAP3Ks have a kinase domain in the C-terminus and a PAS domain in the N-terminal region. PAS domains are found in a variety of proteins and are reported to mediate protein–protein interactions and to sense environmental sti
JAPANESE SOC PLANT CELL & MOLECULAR BIOL, 2011年, Plant Biotechnology, 28 (5), 463 - 470, 英語[査読有り]
研究論文（学術雑誌）
We investigated the involvement of expansin action in determining the growth rate of internodes of floating rice (Oryza sativa L.). Floating rice stem segments in which rapid internodal elongation had been induced by submergence for 2 days were exposed to air or kept in submergence for 2 more days. Both treatments reduced the elongation rate of the internodes, and the degree of reduction was much greater in air-exposed stem segments than in continually submerged segments. These rates of internodal elongation were correlated with acid-induced cell wall extensibility and cell wall susceptibility to expansins in the cell elongation zone of the internodes, but not with extractable expansin activity. These results suggest that the reduced growth rate of internodes must be due, at least in part, to the decrease in acid-induced cell wall extensibility, which can be modulated through changes in the cell wall susceptibility to expansins rather than through expansin activity. Analysis of the cell wall composition of the internodes showed that the cellulosic and noncellulosic polysaccharide contents increased in response to exposure to air, but they remained almost constant under continued submergence although the cell wall susceptibility to expansins gradually declined even under continued submergence. The content of xylose in noncellulosic neutral sugars in the cell walls of internodes was closely and negatively correlated with changes in the susceptibility of the walls to expansins. These results suggest that the deposition of xylose-rich polysaccharides into the cell walls may be related to a decrease in acid-induced cell wall extensibility in floating rice internodes through the modulation of cell wall susceptibility to expansins.
SPRINGER, 2009年01月, PLANT GROWTH REGULATION, 57 (1), 79 - 88, 英語[査読有り]
研究論文（学術雑誌）
We examined the effect of ethylene on the growth of rice seedlings (Oryza sativa L.) at various degrees of humidity. Ethylene significantly suppressed the growth of shoots when applied to seedlings grown under 30% relative humidity (RH), but promoted the growth of shoots when applied to seedlings grown under 100% RH. The application of gibberellic acid (GA(3)) promoted the elongation of shoots in seedlings grown under 30% and 100% RH. Ethylene inhibited the shoot elongation induced by GA(3) at 30% RH, but enhanced the elongation induced by GA(3) at 100% RH. These results indicate that ethylene can either promote or suppress the growth of rice shoots depending on ambient humidity, and that these actions of ethylene may be mediated through modulating the responsiveness of shoots to gibberellin. (C) 2007 Elsevier GmbH. All rights reserved.
ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2007年12月, JOURNAL OF PLANT PHYSIOLOGY, 164 (12), 1683 - 1687, 英語[査読有り]
研究論文（学術雑誌）
- Involvement of acid-induced growth and expansin action in the internodal elongation of submerged floating rice
Floating or deepwater rice (Oryza sativa L.) responds to submergence by rapid internodal elongation. The involvement of acid-induced growth and the pH-dependent wall-loosening protein expansin in such internodal elongation was examined. Living internodal sections excised from floating rice stem segments that had been submerged showed significant enhancement of their growth in
日本熱帯農業学会, 2007年09月, Japanese Journal of Tropical Agriculture, 51 (3), 95 - 101, 英語[査読有り]
研究論文（学術雑誌）
Auxin transport plays a significant role modifying plant growth and development in response to environmental signals such as light and gravity. However, the effect of humidity on auxin transport is rarely documented. It is shown here that the transport of labelled indole-3-acetic acid (IAA) from the shoot to the root is accelerated in rice (Oryza sativa L. ssp. indica cv. IR8) seedlings grown under saturated humidity (SH-seedlings) compared with plants grown under normal humidity (NH-seedlings). The development of lateral roots in SH-seedlings was greatly enhanced compared with NH-seedlings. Removal of the shoot from SH-seedlings reduced the density of lateral roots, and the application of IAA to the cut stem restored the lateral root density, while the decapitation of NH-seedlings did not alter lateral root development. Phloem-based auxin transport appeared responsible for enhanced lateral root formation in SH-seedlings since (i) the rate of IAA transport from the shoot to the root tip was greater than 3.5 cm h(-1) and (ii) naphthylphthalamic acid (NPA)-induced reduction of polar auxin transport in the shoot did not influence the number of lateral roots in SH-seedlings. It is proposed that high humidity conditions accelerate the phloem-based transport of IAA from the leaf to the root, resulting in an increase in the number of lateral roots.
OXFORD UNIV PRESS, 2007年, JOURNAL OF EXPERIMENTAL BOTANY, 58 (7), 1695 - 1704, 英語[査読有り]
研究論文（学術雑誌）
Phosphoethanolamine N-methyltransferase (PEAMT) is involved in choline biosynthesis in plants. The 5' untranslated region (UTR) of several PEAMT genes was found to contain an upstream open reading frame (uORF). We generated transgenic Arabidopsis calli that expressed a chimeric gene constructed by fusing the 5' UTR of the Arabidopsis PEAMT gene (AtNMT1) upstream of the beta-glucuronidase gene. The AtNMT1 uORF was found to be involved in declining levels of the chimeric gene mRNA and repression of downstream beta-glucuronidase gene translation in the calli when the cells were treated with choline. Further, we discuss the role of the uORF.
TAYLOR & FRANCIS LTD, 2006年09月, BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY, 70 (9), 2330 - 2334, 英語[査読有り]
研究論文（学術雑誌）
We have constructed a series of deletion mutants of Arabidopsis MAPK kinase kinase (AtMEKK1) and obtained a constitutively active mutant, At-MEKK1 Delta 166, which lacks in self-inhibitory sequence of N-terminal 166 amino acids but still has substrate specificity. AtMEKK1 Delta 166 predominantly phosphorylates AtMEK1, an Arabidopsis MAPKK, but not its double mutant (AtMEKIT218A/S224E), suggesting that Thr-218 and Ser-224 are the phosphorylation sites. In wounded seedlings, AtMEKK1 was activated and phosphorylated its downstream AtMEK1. Furthermore, analysis using anti-AtMEKK1 and anti-AtMEK1 antibodies revealed that the interaction between the two proteins was signal dependent. These results suggest the presence of AtMEKK1-AtMEK1 pathway induced by wounding.
SPRINGER, 2006年03月, PLANTA, 223 (4), 708 - 713, 英語[査読有り]
研究論文（学術雑誌）
- 日本作物学会, 2006年, 日本作物学会講演会要旨集, 222, 226 - 226
Beta vulgaris L. accumulates a large amount of glycinebetaine (betaine), a metabolite that is related to salt-tolerance. Production of betaine involves expression of many genes that encode enzymes such as betaine aldehyde dehydrogenase, choline monooxygenase, phosphoethanolamine N-methyltransferase, S-adenosyl-L-methionine synthetase, S-adenosyl-L-homocysteine hydrolase, and methionine synthase. We examined transcriptional regulation of the betaine-related genes in leaf beet (Beta vulgaris L. var cicla, cv. shirogukifudanna). Transcript expression of these betaine-related genes in leaf tissue had the following common features: (1) a similar pattern of transcript induction under salt stress, (2) reduced induction under salt stress in a dark condition, and (3) diurnal rhythms of transcript levels under a photoperiod of 16 h light/8 h darkness. The co-regulation of transcripts may contribute to the effective betaine production without disturbing the biosynthesis of other products in leaf beet. Copyright © 2006 The Japanese Society for Plant Cell and Molecular Biology.
Japanese Society for Plant Cell and Molecular Biology, 2006年, Plant Biotechnology, 23 (3), 317 - 320, 英語[査読有り]
研究論文（学術雑誌）
- 2005年, Plant Production Science, 8 447-453 (b)(c), 英語
[査読有り]
研究論文（学術雑誌）
- 2005年, Plant Production Science, 8 441-446 (b)(c), 英語
[査読有り]
研究論文（学術雑誌）
- 2005年, Plant & Cell Physiology, 46 505-513(c), 英語
[査読有り]
研究論文（学術雑誌）
浮稲の節間は, ジベレリン酸 (GA3) 処理により急速な伸長が誘導される.GA3によって急速な伸長が誘導されている浮稲茎切片に, フェルラ酸あるいはp-クマル酸を与えると, 投与量に依存して節間の伸長量は低下した.その作用はフェルラ酸の方が効果的であった.p-クマル酸やフェルラ酸の投与はまた, 節間の伸長部位での細胞壁中のp-クマル酸およびフェルラ酸, 5-5-ジフェルラ酸含量を増加させた.これらの茎切片において, 節間伸長量の低下は, p-クマル酸含量との間に比べて, フェルラ酸および5-5-ジフェルラ酸含量との間により強い相関が認められた.これらの結果は, フェルラ酸および5-5-ジフェルラ酸の細胞壁への沈着が浮稲節間の伸長を低下させる原因の一つであることを示唆している.
Japanese Society for Tropical Agriculture, 2005年, Japanese Journal of Tropical Agriculture, 49 (3), 215 - 219, 英語[査読有り]
研究論文（学術雑誌）
- Interactions between abscisic acid, ethylene and gibberellin in internodal elongation in floating rice: the promotive effect of abscisic acid at low humidity
The enhancement of internodal elongation in floating or deepwater rice (Oryza sativa L. cv. Habiganj Aman II) by treatment with ethylene or gibberellic acid (GA(3)) at high relative humidity (RH) is inhibited by abscisic acid (ABA). Here, we examined the interactive effects of ethylene, gibberellin (GA) and ABA at low RH on internodal elongation of deepwater rice stem segments. Although ethylene alone hardly promoted internodal elongation of stem sections at 30% RH, it enhanced the internodal elongation induced by GA(3). Application of ABA alone to stem segments had no effect on internodal elongation. However, in the presence of ethylene and GA(3) at 30% RH, ABA further promoted internodal elongation. This promotive effect of ABA was not found in the internodes of stem segments treated either with ethylene or with GA(3) at 30% RH or in the internodes of stem segments treated with ethylene and/or GA(3) at 100% RH.
KLUWER ACADEMIC PUBL, 2003年10月, PLANT GROWTH REGULATION, 41 (2), 105 - 109, 英語[査読有り]
研究論文（学術雑誌）
- Enhancement of transpiration by ethylene is responsible for absence of internodal elongation in floating rice at low humidity
Internodal elongation in floating rice (Oryza sativa) is known to be enhanced by treatment with ethylene or gibberellic acid (GA(3)) at high relative humidity (RH). However, ethylene-induced internodal elongation is inhibited at low RH, while GA(3)-induced internodal elongation is hardly affected by humidity. We examined the effects of ethylene and GA3 on the rate of transpiration in stem segments incubated at 30 % or 100 % RH. Ethylene promoted the transpiration of stem segments at 30 % RH. but not at 100% RH, while GA(3) had little effect on transpiration at either 30% or 100% RH. We propose that the absence of ethylene-induced internodal elongation at low RH is due, at least in part, to ethylene-induced transpiration.
URBAN & FISCHER VERLAG, 2003年09月, JOURNAL OF PLANT PHYSIOLOGY, 160 (9), 1125 - 1128, 英語[査読有り]
研究論文（学術雑誌）
- The expression of a germin-like protein with superoxide dismutase activity in the halophyte Atriplex lentiformis is differentially regulated by wounding and abscisic acid
The cDNA clone encoding a putative germin-like protein (GLP) was isolated from the halophyte Atriplex lentiformis (Torr.) Wats. The deduced amino acid sequence of the protein showed high homology to those of various plant germins or germin-like proteins. The protein was designated as AlGLP (A. lentiformis germin-like protein). It was found that AlGLP has superoxide dismutase (SOD; EC 1.15.1.1) activity by in-gel SOD assays after immunoprecipitation, and that it is a glycosylated oligomer in native form. The AlGLP was strongly expressed in calli and weakly in roots, but not in stems or leaves. Interestingly, the transcript level in roots was decreased by salt or abscisic acid (ABA) treatment. We present evidence that the accumulation level of AlGLP mRNA in leaves is increased by methyl jasmonate treatment or wounding, and that the induction is suppressed by ABA treatment. These results suggest that AlGLP expression is increased to fulfil H-2 O-2 supply to modify the structure of cell wall in response to wounding.
BLACKWELL MUNKSGAARD, 2003年08月, PHYSIOLOGIA PLANTARUM, 118 (4), 523 - 531, 英語[査読有り]
研究論文（学術雑誌）
- 2002年, 神戸大学農学部学術報告, 26, 27 - 34Thong PT, Azuma T, Nanmori T, Yasuda T. Equilibrium moisture content of coffee bean.
[査読有り]
研究論文（大学，研究機関等紀要）
イネを持続的に生産し, かつ環境汚染を防ぐためには, 窒素肥料を適切で効果的に利用することが重要である.本研究では, 水耕による急激な窒素欠乏処理と土耕による低窒素供給処理を行い, これらの低窒素処理に対するインド型の改良3品種と在来5品種の成長反応の差異を調べた.解析には, 相対成長率や純同化率などの基本的な成長関数に加えて, 窒素利用率 (単位体内窒素増加量当りの乾物増加量) も適用した.相対成長率は概して改良品種より在来品種で高く, 在来品種のPokkaliが最も高い値を示した.この相対成長率は純同化率と有意に高い正の相関関係を示したが, 比葉面積および葉重比との間には有意な相関がみられなかった.窒素利用率は各々の低窒素処理下で相対成長率および純同化率と高い正の相関関係を示した.以上のことから, 低窒素条件の場合に, 在来品種の成長が改良品種のそれよりも良好であるのは純同化率と窒素利用率が高いためと考えられた.
Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists, 2002年, Environmental Control in Biology, 40 (2), 195 - 200, 英語[査読有り]
研究論文（学術雑誌）
異なる3段階の窒素施肥量下で水耕栽培したインド型イネ8品種の光合成能力とRubisco含量との関係を調べた.酸素電極法による最大光合成能力とRubisco含量との間には, 含量が2gm-2以下では比例関係があり, それ以上の含量では飽和する傾向がみられた.Pokkali, BaisbishとIR442-2-58はRubisco量当りの光合成能力が高い品種であった.比例域での回帰分析の結果, イネ葉の最大光合成能力に対するRubiscoの効率には品種間差異があり, その効率が高い品種群と低い品種群とに大きく区分された.
Japanese Society for Tropical Agriculture, 2002年, Japanese Journal of Tropical agriculture, 46 (3), 161 - 165, 英語[査読有り]
研究論文（学術雑誌）
Submergence induces rapid elongation of internodes in floating rice (Oryza sativa L. cv. Habiganj Aman II). The initial signal for such internodal elongation has been considered to be the reduced partial pressure of oxygen in submerged internodal cavities, which promotes the elongation of internodes through the enhancement of ethylene synthesis. We examined the relationship between low oxygen pressure and ethylene production in the rapid elongation of floating rice internodes using ethylene biosynthesis inhibitors, aminooxyacetic acid (AOA) and CoCl2. When floating rice stem segments were incubated in an atmosphere of low O2, internodal elongation accelerated and ethylene production increased. However, in stem segments treated with AOA or CoCl2, low O2 still stimulated the elongation of internodes although the ethylene production by the internodes was less than by those in control stem segments where internodal elongation was not promoted. These results indicate that low O2 is capable of causing rapid elongation of internodes of floating rice independently of enhanced production of ethylene. In addition to low O2, submergence, ethylene and gibberellic acid each enhanced the production of ethylene by internodal tissues, suggesting that enhanced ethylene production is a common phenomenon accompanied by the acceleration of internodal elongation in floating rice.
2001年, Plant Growth Regulation, 34 (2), 181 - 186, 英語[査読有り]
研究論文（学術雑誌）
- 2000年, 神戸大学大学院自然科学研究科紀要 B, 18, 117 - 122グロリオーサ塊茎のin vitro 培養による大量増殖に関する研究
[査読有り]
研究論文（大学，研究機関等紀要）
- Light dependent activation of CO2 assimilation and the ratio of Rubisco activase to Rubisco during leaf aging of rice (Oryza sativa)
The effects of the ratio of Rubisco activase to Rubisco (activase/Rubisco ratio) on light dependent activation of CO2 assimilation were investigated during leaf aging of rice. Changes of photosynthetic CO2 gas exchange rates in relation to step increases of light intensity from two photon flux densities of 60 mu mol m(-2) s(-1) (low initial PFD) and 500 mu mol m(-2) s(-1) (high initial PFD) to saturated PFD of 1800 mu mol m(-2) s(-1) were measured. These photosynthetic activation processes were considered to be limited by the Rubisco activation rate when analyzed by the relaxation method. The relaxation time of low initial PFD gradually declined from 3 to 33 days after leaf emergence and showed high and negative correlation to the activase/Rubisco ratio. The initial rate of Rubisco activation under low initial PFD linearly correlated to the amounts of Rubisco activase, whereas these were almost constant from 3 to 23 days after leaf emergence. But these correlations could not be recognized in the case of high initial PFD. Moreover, the relaxation times were more sensitive to intercellular CO2 concentration (C-i) under high initial PFD than under low initial PFD; especially, at C-i below 300 mu l l(-1) These results suggest the involvement of the activase/Rubisco ratio in the photosynthetic activation under relatively low initial PFD, and the limitation of photosynthetic activation under relatively high initial PFD by Rubisco carbamylation during leaf aging of rice.
MUNKSGAARD INT PUBL LTD, 1998年12月, PHYSIOLOGIA PLANTARUM, 104 (4), 541 - 548, 英語[査読有り]
研究論文（学術雑誌）
Floating rice (Oryza sativa L.) responds to submergence by rapid internodal elongation. This stimulated growth needs an increase in the supply of photoassimilates. We investigated the effects of submergence on the export rate of photoassimilates determined by a 13C-tracer experiment and the activity of sucrose phosphate synthase (SPS), a key enzyme in the sucrose biosynthesis pathway, in floating rice. Plants at the 9.5 leaf stage were submerged up to the tip of the 7th leaf blade for 5 days. Export rates of the 13C-photoassimilates at the 9th (9L) and 10th (10L) leaf blades were much higher in the submerged plants than in the control. In order to analyze the activation state of SPS, the activities of SPS were assayed under saturated substrates (Vmax) and limiting substrates plus Pi (Vlimiting). The Vlimiting of SPS of the 9L and 10L were higher in the submerged plants than in the control, whereas the Vmax did not differ between both plots. These results indicate that the SPS of the leaves in the upper position was more highly activated in the submerged plants. Moreover, the Vlimiting of SPS was correlated positively with the export rate. These results suggest that an increase in the Vlimiting of SPS induced by a high activation state might accelerate the export rates of photoassimilates, and that this is probably one of the important factors that support the supply of photoassimilates required for the rapid growth of the sink organs in submerged floating rice.
Crop Science Society of Japan, 1997年, Japanese Journal of Crop Science, 66 (4), 675 - 681, 英語[査読有り]
研究論文（学術雑誌）
Internodal elongation in floating rice (Oryza sativa L. cv. Habiganj Aman II) is known to be enhanced by treatment with ethylene or gibberellic acid (GA3) at high relative humidity (RH). However, ethylene-induced internodal elongation is inhibited at low RH, while GA3-induced internodal elongation is hardly affected by humidity. We examined the possible involvement of osmoregulation in the stimulation by GA3 of the elongation of internodes at low RH. Submergence and treatment with ethylene or GA3 at 100% RH increased the osmotic potential in internodes of excised stem segments, while GA3 at 20% RH maintained the osmotic potential at a low level. In internodes of stem segments that had been treated with GA3 at 20% RH, the activity of invertase and the level of soluble sugars were almost 2- and 1.5-fold higher, respectively, than those in internodes that had been treated with GA3 at 100% RH. These results indicate that one of the possible mechanisms by which GA3 promotes elongation of internodes at low RH involves the osmoregulation that is achieved by promotion of the synthesis of invertase.
Blackwell Publishing Ltd, 1997年, Physiologia Plantarum, 99 (4), 517 - 522, 英語[査読有り]
研究論文（学術雑誌）
- Springer Science and Business Media LLC, 1996年07月, Plant Growth Regulation, 19 (2), 183 - 187
[査読有り]
研究論文（学術雑誌）
- Relationships between photosynthetic activity and the amounts of Rubisco activase and Rubisco in rice leaves from emergence through senescence
Photosynthetic activity determined as O-2, evolution (OER) and the amounts of Rubisco activase, Rubisco, total soluble protein and chlorophyll were investigated in the 10th leaf of rice, Oryza sativa L. cv. Nipponbare, in relation to its aging. The Rubisco activase content increased until the 17th day after leaf emergence, at which time it attained its maximum and accounted for 1.43% of total soluble protein thereafter, it decreased rapidly. This change was most remarkable compared to the other leaf constituents examined. The Rubisco content had already reached its maximum 3 days after leaf emergence and had begun to decrease earliest among the leaf constituents. The OER depended linearly on the leaf Rubisco content below the value of 3 g m(-2), but tended to saturate above this value. On the contrary, the amount of Rubisco activase and OER were linearly correlated during the life span of the leaf. The in vivo Rubisco activity, as the OER per unit Rubisco content, increased exponentially with the increased Rubisco activase/Rubisco ratio. These results show that the amount of Rubisco activase is closely related to the photosynthetic rates in rice leaf from its emergence through senescence, and suggest that in vivo Rubisco activity can be restricted by Rubisco activase content, particularly when the leaf is young and accumulates excess Rubisco.
CROP SCIENCE SOC JAPAN, 1996年06月, JAPANESE JOURNAL OF CROP SCIENCE, 65 (2), 296 - 302, 英語[査読有り]
研究論文（学術雑誌）
Floating rice plants adapt to submergence by rapid internodal elongation. In this study, we examined the changes in the distribution of photoassimilates using 13G and the activities of enzymes involved in sucrose metabolism of floating rice plants under submergence. Total (per plant) and specific (per soluble protein) activities of acid invertase (AI) of the rapidly elongating 9th internode increased remarkably 1 day after submergence. These increases corresponded to the accumulation of hexose. It is likely that the increased AI activities of the 9th internode in the submerged plant promoted the hydrolysis of sucroce and maintained the turgor pressure in the elongating cells. Total sucrose synthase (SS) activity of the 9th internode in the submerged plant increased markedly after 3 days and corresponded to the accumulation of dry matter. Comparing each value in the submerged plants with the control, the distribution of photoassimilates to the uppermost 9th internode increased considerably, while there was a decline in the 8th internode. These changes were in agreement with the changes in activities of AI and /or SS. Sucrose/hexose ratio of the 9th internode also declined under submergence. These results suggest that the changes in the activities of the enzymes involved in sucrose metabolism may be related to the changes in the distribution of photoassimilates to the sink organs of submerged floating rice plants via the increase in the magnitude of the sucrose concentration gradients which exist between source and sink.
Crop Science Society of Japan, 1996年, Japanese Journal of Crop Science, 65 (3), 540 - 548, 日本語[査読有り]
研究論文（学術雑誌）
- THE ROLE OF ETHYLENE IN SOMATIC EMBRYOGENESIS FROM LEAF DISCS OF COFFEA-CANEPHORA
The role of ethylene in the formation of somatic embryos from leaf discs of Coffea canephora was studied on a medium that contained a cytokinin, iso-pentenyladenine, as the sole plant growth regulator. During incubation under these conditions, explants always produced a small amount of ethylene. Removal of this ethylene by an absorbent reduced the number of somatic embryos induced by the cytokinin, Application of inhibitors of the production of ethylene (Co2+ ions) and of the action of ethylene (Ag+ ions) inhibited the formation of embryos. Exogenous ethylene gas (12 mu l/l) partially overcame the effect of Co2+ ions. These results indicate that ethylene plays an important role in regulating somatic embryogenesis in leaf cultures of Coffea canephora.
ELSEVIER SCI PUBL IRELAND LTD, 1995年06月, PLANT SCIENCE, 107 (2), 199 - 204, 英語[査読有り]
研究論文（学術雑誌）
- 1995年, 16TH INTERNATIONAL SCIENTIFIC COLLOQUIUM ON COFFEE, VOLS I & II, 839 - 844Amino acids on somatic embryogenesis in Coffea arabica
浮稲は深水下で節間の伸長が著しく促進される.急激に伸長が促進されている節間への同化産物の供給の増加は, 深水下で生育する浮稲にとって欠かすことができない.我々の目的は, トレーサーとして13Cを用いて, 深水直後の各器官のシンク能と同化産物の分配パターンの変化を明らかにすることである.さらに, シュクロースの形成率を測定することにより, ソース能に及ぼす深水の影響も調査した.今回の研究では, ソースとしての葉身が最上位節間上にある葉に限定された植物体を使用した.最上位節間への炭素の転流は, 深水処理後すぐに促進された.対照的に, 深水処理により, 低位の器官における乾物重とラベルした炭素の分配率の増加が抑制された.よって, 浮稲は深水下での生育に有利なように同化産物の分配パターンを変化させ, それらの特性により, 浮稲は深水下で生存するための同化産物の効率的な利用を可能にしていることが明らかとなった.最上位節間上にある葉身のシュクロース/デンプン比は, 深水処理により著しく増加した.この結果から, 深水処理により水面上にある上位葉のソース能は増加することが示唆され, 以前報告された水面上の上位葉における単位面積当たりの光合成能力が深水により増加することと一致した.
Japanese Society for Tropical Agriculture, 1995年, 熱帯農業, 39 (3), 177 - 183, 英語Submergence induces rapid internodal elongation in floating rice (Oryza sativa L.). The involvement of abscisic acid (ABA) in such internodal elongation has been examined. Application of ABA to stem sections reduced the extent of internodal elongation induced by submergence, ethylene, or gibberellic acid (GA3). Submergence and treatment with ethylene decreased the levels of ABA in plants and stem sections. This result indicates that a decrease in levels of ABA is involved in the internodal elongation induced by ethylene, the level of which increases in internodes during submergence. However, when plants or stem sections were treated with ethylene at low relative humidity, the levels of ABA decreased but internodes barely increased in length. Moist surroundings, such as submerged conditions, may be necessary if the decrease in levels of ABA is to lead to internodal elongation in floating rice. © 1995, Gustav Fischer Verlag, Stuttgart. All rights reserved.
1995年, Journal of Plant Physiology, 146 (3), 323 - 328, 英語[査読有り]
研究論文（学術雑誌）
- ASSOC SCIENTIFIQUE INT CAFE, 1995年, 16TH INTERNATIONAL SCIENTIFIC COLLOQUIUM ON COFFEE, VOLS I & II, 16, 790 - 797, 英語Effect of plant hormones on somatic embryogenesis of Coffea canephora
研究論文（国際会議プロシーディングス）
浮稲 (Habiganj Aman II) を深水条件下で栽培すると, 内生のエチレンとジベレリン含量が増加し, 節間が著しく伸長する.本研究では, この二つの植物ホルモンの関係について着目し, 節間組織でのエチレン合成の促進にジベレリンが関与しているかどうかを調査した.気中条件や水中条件で茎切片をジベレリン酸 (GA3) で処理すると, 節間の伸長促進とエチレン発生量の増加が認められた.また, GA3処理により, 1-アミノシクロプロパン-1-カルボン酸合成酵素とエチレン合成酵素の活性が増大した.ジベレリン生合成の阻害物質であるアンシミドール溶液 (100μM) で茎切片を深水処理すると, 蒸留水で深水処理したものに比べて, 節間の伸長量は1/2, 節間内エチレン濃度は2/3に減少した.以上により, 浮稲節間組織において, ジベレリンはエチレンの合成を促進する作用のあることが判明した.
Japanese Society for Tropical Agriculture, 1994年, 熱帯農業, 38 (1), 78 - 82, 英語[査読有り]
- Oxford University Press (OUP), 1991年03月, Plant and Cell Physiology, 32 (2), 307 - 309
[査読有り]
研究論文（学術雑誌）
深水下での浮稲節間の急速な伸長における各種植物ホルモンの役割を調べる目的で, バングラデシュの浮稲品種Habiganj Aman IIの茎切片を用いて, 異なる濃度のジベレリン酸 (GA3) ・アブシジン酸 (ABA) ・ベンジルアデニン (BA) ・インドール酢酸 (IAA) で処理した時の節間の伸長量の変化, 並びに深水とエチレン処理による内生ジベレリン含量の変化について調査した.
Japanese Society for Tropical Agriculture, 1990年, Japanese Journal of Tropical Agriculture, 34 (4), 271 - 275, 英語
処理した植物ホルモンの中で, 単独のホルモン処理によって節間の伸長を促進したのは, GA3だけであった.IAAは, 10μMのGA3と共に与えると, 10μM以下の濃度でGA3による節間伸長を相乗的に促進した.高濃度のABA・BA・IAAはGA3による節間伸長促進作用を抑制した.
矮性イネ (短銀坊主) を用いる検定法で内生ジベレリン含量を測定した結果, 深水及びエチレン処理によって有意に節間の伸長が促進されたにも関わらず, 深水処理を行った茎切片の内生ジベレリン含量は増加したが, エチレン処理した茎切片での増加は認められなかった.
以上の結果より, 深水下での急速な節間伸長に関与する植物ホルモンとして, エチレンとジベレリン以外にIAAも考えられる.さらに, 深水下における浮稲の節間伸長において, ジベレリンとエチレンとは異なる作用過程を通じて関与していることが示唆される.[査読有り]
深水下における浮稲の節間伸長と内生エチレンとの関係について調べるために, バングラデシュの浮稲品種Habiganj Aman IIの茎切片を用いて, 深水処理の水位と節間空隙内のエチレン量及び節間・葉の成長との関係について調べた.
Japanese Society for Tropical Agriculture, 1990年, Japanese Journal of Tropical Agriculture, 34 (4), 265 - 270, 英語
まず水圧と節間伸長との関係を明らかにするために, 茎切片を横方向に固定し, 水位を100cmまで段階的に変えて深水処理を行った.深水処理により節間は伸長したが, 水深の程度に応じては伸長は促進されず, 節間伸長の促進の差は水中か気中にあるかによる違いだけであった.
茎切片を縦方向に固定し, 水位を段階的に変える処理を3日間行った.節間の伸長は, 処理開始時に茎切片が水面下にある区で著しい促進が認められた.節間空隙内のエチレン濃度は, 処理終了時に茎切片が水面下にある区で高くなった.
次に, 茎切片に5日間深水処理を行い, 節間と葉の伸長量および節間空隙内のエチレン濃度を経時的に調査した.深水処理により節間内のエチレン濃度は増加したが, 茎切片の一部が水面上に出ることによりエチレン濃度は減少した.一方節間の伸長は, 深水処理により促進されたが, 茎切片の一部が水面上に出て節間内のエチレン濃度が減少したにも関わらず節間の伸長促進は変化しなかった.
以上により, 深水下での浮稲の節間伸長の促進は, 水圧の影響は受けず, 水中でのガス拡散の低下による組織内でのエチレン濃度の増加が要因の一つと考えられる.また, 急激な節間伸長にとってエチレンは引金的役割をしているのかもしれない.[査読有り]
異なる水位上昇速度下で栽培した浮稲の主稈と分げつの乾物生産並びに葉面積の変化を調べた.深水により弱小な2次分げつの乾物生長速度が低下するのに対し, 主稈や1次分げつのそれはむしろ大きく, 稈への乾物分配も大きくなった.すなわち, 浮稲は個体の生長に最も有利になるようにシンク・ソースのバランスを変化させて深水条件に対応しているものと考えられた.
Japanese Society for Tropical Agriculture, 1989年, 熱帯農業, 33 (4), 253 - 260, 日本語[査読有り]
浮稲14品種および非浮稲3品種に, 約8.5葉期から1日当り4cmの速度で20日間水位上昇処理を行い, 処理開始時, 12日目および20日目に草丈, 最上位カラー部の高さ, 総節間長, 葉面積, 乾物重を測定した.得られた結果から生長関数を求め, 各部位の伸長速度とそれら関数との関係について検討した.相対生長率 (RGR) あるいは乾物生長速度 (GR) と葉面積に関する生長関数との間には, 全葉面積よりも水面上の葉面積を対象とした場合により有意な正の相関関係が認められた.RGRやGRとの間には, 純同化率 (NAR) はいずれの期間においても高い正の相関を示すが, 葉面積比や平均葉面積は水位が高くなった処理後半において相関が高くなった.NARと各部位の伸長速度とは無関係であるのに対し, 相対葉面生長率は節間長や最上位カラー部の高さの変化と密接な関係があった.
Japanese Society for Tropical Agriculture, 1989年, 熱帯農業, 33 (3), 164 - 172, 日本語[査読有り]
MISC
- 2013年09月09日, 日本作物學會紀事, 82, 342 - 243, 日本語浮稲冠根の成長方向に及ぼす光と重力の影響
- 2013年09月09日, 日本作物學會紀事, 82, 346 - 347, 日本語低酸素環境が誘導する浮稲節間の伸長反応
- 2012年09月09日, 日本作物學會紀事, 81, 310 - 311, 日本語イネの伸長成長に及ぼす重力の影響
- 2012年09月09日, 日本作物學會紀事, 81, 306 - 307, 日本語南米野生イネ Oryza glumaepatula と O. grandiglumis の洪水下での伸長反応におけるエチレンの関与
- 2012年09月09日, 日本作物學會紀事, 81, 308 - 309, 日本語イネ科作物の嫌気条件における重力屈性反応とエネルギー状態の関係
- 2012年09月09日, 日本作物學會紀事, 81, 312 - 313, 日本語水田雑草オモダカとウリカワの塊茎萌芽期の節間伸長を促進する要因
- 2011年08月30日, 日本作物學會紀事, 80, 244 - 245, 日本語南米野生イネの短期冠水に対する応答
- 2011年08月30日, 日本作物學會紀事, 80, 224 - 225, 日本語浮稲節間細胞壁におけるエクスパンシンの反応性に及ぼすフェノール化合物と多糖の影響
- 2010年09月03日, 日本作物學會紀事, 79, 252 - 253, 日本語南米野生イネ種 Oryza grandiglumis と O. glumaepatula の急速な水位上昇に対する応答
- 2010年09月03日, 日本作物學會紀事, 79, 250 - 251, 日本語禾穀類の茎葉部における嫌気条件下での重力屈性反応の比較
- 2010年09月03日, 日本作物學會紀事, 79, 398 - 399, 日本語塊茎からの出芽における水田雑草オモダカとウリカワの伸長器官の差異
- 2009年03月27日, 日本作物學會紀事, 78, 308 - 309, 日本語浮稲節間の伸長に及ぼす深水と光強度の影響
- 2009年03月27日, 日本作物學會紀事, 78, 304 - 305, 日本語Oryza grandiglumis および O. glumaepatula の浮稲性について
- 2009年03月27日, 日本作物學會紀事, 78, 300 - 301, 日本語浮稲節間の細胞壁におけるフェルラ酸およびジフェルラ酸の沈着がエクスパンシンに対する反応性に及ぼす影響
- 浮稲節間の伸長成長―植物ホルモンによる調節と細胞壁の変化
浮稲は，洪水環境で栽培可能な唯一の作物であり，それは主として深水状態で急速に節間を伸長させる能力に基づく。環境ストレスに対するこの浮稲の適応機構は，生態学や形態学，遺伝学，生理・生化学， 分子生物学などの様々な観点から研究がなされてきた。本稿では，浮稲節間の急速な伸長に関して，植物ホルモンによる調節と細胞壁の構造変化を中心に調査してきた著者のグループの研究について主に紹介したい。
日本作物學會, 2009年01月, 日本作物学会紀事, 78 (1), 1 - 8, 日本語[査読有り]
記事・総説・解説・論説等（学術雑誌）
- 日本作物学会, 2008年, 日作紀, 77 (2), 306 - 307, 日本語低酸素環境による浮稲茎葉の成長促進
- 日本作物学会, 2008年, 日作紀, 77 (2), 308 - 309, 日本語浮稲節間におけるエクスパンシンに対する細胞壁の反応性と壁構造の関係
- 日本熱帯農業学会, 2003年09月25日, 熱帯農業, 47 (2), 29 - 30, 日本語浮稲茎葉部の重力屈性反応について
- 日本作物学会, 2003年09月17日, 日本作物學會紀事, 72 (2), 304 - 305, 日本語浮稲節間の伸長とエチレンによる蒸散の促進(日本作物学会第216回講演会要旨・資料集)
- 日本作物学会, 2003年09月17日, 日本作物學會紀事, 72 (2), 306 - 307, 日本語浮稲節間の伸長に伴うエクスパンシンの活性と細胞壁反応性の変化(日本作物学会第216回講演会要旨・資料集)
- 日本作物学会, 2001年09月27日, 日本作物學會紀事, 70 (2), 193 - 194, 日本語低酸素濃度はエチレン発生と関係なく浮稲節間の伸長を促進する
- 日本作物学会, 2001年, 日作紀, 70 (2), 195 - 196, 日本語浮稲節間の伸長に伴う細胞壁中の (1->3), (1->4)-β-D-グルカン量とグルカナーゼ活性の変化
- Japanese Society of Plant Physiologists, 2001年, Plant and cell physiology, 42, s106, 英語POSTULATION OF NEW TYPE AGC-PROTEIN KINASE IN BOTH PLANT & ANIMAL :
- Japanese Society of Plant Physiologists, 2001年, Plant and cell physiology, 42, s93, 英語EFFECT OF OSMOLARITY, DEHYDRATION AND ABA ON AMOUNTS OF ATSRPK1 TRANSCRIPTS :
- 日本作物学会, 1998年04月02日, 日本作物學會紀事, 67, 104 - 105, 日本語イネ葉の加齢に伴うRubiscoの活性化状態の変化 : 特にRubiscoのカルバミル化サイト数と反応回転速度について
- 68 野生イネにおける有用光合成機能 : in vivoのRubisco活性
野生イネO.barthiiとO.meridionalisのin vivoのRubisco比活性は栽培種のそれより有意に高く, Rubiscoの活性比率とRubisco activase含量も高い。
日本作物学会, 1997年10月18日, 日本作物學會紀事, 66 (2), 135 - 136, 日本語 - 日本作物学会, 1997年04月02日, 日本作物學會紀事, 66 (1), 134 - 135, 日本語67 イネ葉切片のABA処理によるRubisco含量の特異的な減少とタンパク質分解酵素の関係
- 日本作物学会, 1997年04月02日, 日本作物學會紀事, 66 (1), 132 - 133, 日本語66 イネ葉の光合成活性化における緩和時間の加齢による変化とRubiscoに対するRubisco activaseの量比との関係
- 1997年03月, Plant and cell physiology, 38, s116, 英語ETHYLENE-INDUCED ELONGATION AND TRANSPIRATION IN INTERNODES OF FLOATING RICE
- 日本作物学会, 1996年10月02日, 日本作物學會紀事, 65 (2), 209 - 210, 日本語105 浮稲節間のジベレリンによる伸長促進と浸透調節
- 日本作物学会, 1996年10月02日, 日本作物學會紀事, 65 (2), 175 - 176, 日本語88 野生イネにおける有用光合成機能の探索
- 日本作物学会, 1996年04月03日, 日本作物學會紀事, 65 (1), 108 - 109, 日本語54 深水下における浮イネの急速な生長に伴う光合成産物の転流とシュクロース合成酵素活性の変化
- 日本作物学会, 1996年04月03日, 日本作物學會紀事, 65 (1), 84 - 85, 日本語42 イネ葉切片の老化による光合成能力の低下に及ぼす植物生長調節物質の影響 : 特にRubisco activase および Rubisco含量とタンパク質分解酵素について
- 1996年03月, Plant and cell physiology, 37, 144 - 144, 英語GIBBERELLIN-INDUCED ELONGATION AND OSMOREGULATION IN INTERNODES OF FLOATING RICE
- 48 イネ葉の加齢に伴う光合成能力の変化とRubisco activase含量との関係
イネ葉の加齢に伴う光合成速度の変化はRubisco activase含量との関係が最も密接で, in vivoの活性はRubiscoに対するRubisco activaseの比率が高いほど高い.
日本作物学会, 1995年04月03日, 日本作物學會紀事, 64 (1), 96 - 97, 日本語 - 1995年03月, Plant and cell physiology, 36, S84, 英語ETHYLENE AND GROWTH IN INTERNODES OFFLOATING RICE UNDER HYPOXIA
- 1995年03月, Plant and cell physiology, 36, S84, 英語OXYGEN AND GROWTH IN INTERNODES OFSUBMERGED FLOATING RICE
- 1995年03月, Plant and cell physiology, 36, S109, 英語ROLE OF ETHYLENE IN SOMATIC EMBRYOGENESISOF COFFEA CANEPHORA
- 70 イネ葉からの Ribulose-1,5-Bisphosphate Carboxylase/Oxygenase activaseの精製
ゲルろ過とイオン交換クロマトグラフィーにより, イネ葉より Rubisco activase を精製することができた. 12.5% SDS-PAGE の結果それは約40 kDa のペプチドであることがわかった.
日本作物学会, 1994年, 日本作物學會紀事, 63 (1), 140 - 141, 日本語
書籍等出版物
- 共著, 培風館, 2019年01月, 日本語, ISBN: 9784563078263熱帯農学概論
学術書
- 共著, 朝倉書店, 2017年07月, 日本語作物栽培体系７ 工芸作物の栽培と利用
学術書
- 共著, 文永堂出版, 2013年11月, 日本語作物学
学術書
- 共著, 農山漁村文化協会, 2010年03月, 日本語作物学用語事典
学術書
講演・口頭発表等
- 種子生理生化学研究会, 2018年11月, 日本語, 国内会議異なる窒素施与条件が根粒着生能の異なる3種の準同質系統ダイズの種子収量・品質に与える影響解析—完熟種子δ15N値に基づく窒素同化・固定量の評価
口頭発表（一般）
- 第31回植物脂質シンポジウム, 2018年11月, 日本語, 高知大学, 国内会議Vernonia galamensis DGAT1は他種のDGAT1より シロイヌナズナ種子油含量を上げることができる
ポスター発表
- The 14th International Symposium on Biocatalysis and Agricultural Biotechnology, 2018年10月, 英語, Kuala Lumpur, Malaysia, 国際会議Vernonia galamensis DGAT1 can increase Arabidopsis seed oil content more than other DGAT1s
ポスター発表
- 日本作物学会第246回講演会, 2018年09月, 日本語, 北海道大学農学部, 国内会議南米野生イネOryza glumaepatulaの浮稲反応の解析
ポスター発表
- 日本土壌肥料学会2018年度大会, 2018年09月, 日本語, 国内会議異なる窒素施与条件が根粒着生能の異なる3種の準同質系統ダイズの種子収量・品質に与える影響解析—完熟種子δ15N値に基づく窒素同化・固定量の評価
口頭発表（一般）
- 日本作物学会第246回講演会, 2018年09月, 日本語, 北海道大学農学部, 国内会議イネRubiscoのC4化と構造機能相関
口頭発表（一般）
- 日本作物学会第246回講演会, 2018年09月, 日本語, 北海道大学農学部, 国内会議アフリカイネOryza glaberrimaとその祖先種Oryza barthiiの洪水に対する応答
ポスター発表
- The 23rd International Symposium on Plant Lipids, 2018年07月, 英語, Yokohama, Japan, 国際会議Highly active Vernonia galamensis DGAT1 can effectively increase oil levels in yeast, soybean and Arabidopsis
ポスター発表
- 近畿作物・育種研究会 第185回, 2018年06月, 日本語, 国内会議根粒超着生系統ダイズの低収量の主因は、根粒自身ではない―根粒着生能の異なる三種の同質系統 ダイズへの窒素施与の影響比較―
口頭発表（一般）
- 近畿作物・育種研究会 第185回例会, 2018年06月, 日本語, 国内会議アフリカイネ Oryza glaberrima とその祖先種 O. barthii の洪水に対する応答
口頭発表（一般）
- 日本作物学会講演会, 2018年, 日本語, 国内会議シロイヌナズナにおける CRCT オーソログの機能解析
ポスター発表
- 日本作物学会講演会, 2018年, 日本語, 国内会議イネの Rubisco activase 様タンパク質 Rca2 は Rubisco activase の機能を阻害する
ポスター発表
- 日本光合成学会講演会, 2018年, 日本語, 国内会議イネRubisco activase様タンパク質OsRca2はRubiscoの活性化を阻害する
ポスター発表
- International Symposium on Photosynthesis and Chloroplast Biogenesis, 2018年, 英語, 国内会議Functional analysis of Rubisco small subunit, OsRbcS1, that is not expressed in photosynthetic organs in rice
ポスター発表
- 日本作物学会講演会, 2018年, 日本語, 国内会議C4植物の Rubisco 小サブユニットを高発現する形質転換イネの Rubisco 酵素特性
ポスター発表
- The 7th Asian Symposium on Plant Lipid, 2017年11月, 英語, Taipei, Taiwan, 国際会議Highly active Vernonia galamensis DGAT1 can effectively increase seed oil levels in soybean and Arabidopsis
ポスター発表
- 日本作物学会第244回講演会, 2017年09月, 日本語, 岐阜大学, 国内会議浮稲性遺伝子と冠水耐性遺伝子を併せ持つイネ品種の深水成長応答と関連遺伝子の発現
ポスター発表
- 日本作物学会第244回講演会, 2017年09月, 日本語, 岐阜大学, 国内会議南米野生イネOryza glumaepatulaの深水に対する応答とSNORKEL遺伝子の多様性
ポスター発表
- 日本作物学会第244回講演会, 2017年09月, 日本語, 岐阜大学, 国内会議深水環境下において浮稲節間の伸長を誘導する新規因子の探索
ポスター発表
- 日本作物学会 第244回講演会, 2017年09月, 日本語, 岐阜大学, 国内会議ベルノニアのDGAT1はシロイヌナズナにおいても他種のDGAT1より高い活性を示すか？
ポスター発表
- 第30回植物脂質シンポジウム, 2017年09月, 日本語, お茶の水大学, 国内会議シロイヌナズナにおけるベルノニアDGAT1の働き
ポスター発表
- Plant Biology 2017, 2017年06月, 英語, Honolulu, Hawaii, USA, Plant oils represent one of the world’s most important renewable resources. In addition to extensive food uses, vegetable oils also have value as renewable chemical derivatives and fuels, such as biodiesel. Worldwide production of plant oil has been increasing. Triacylglycerols (TAGs) are the major component of plant storage lipid. Acyl-CoA:diacylglycerol acyltransferase (DGAT), 国際会議Vernonia DGAT1 can increase Arabidopsis seed oil content more than other DGAT1s
ポスター発表
- 日本作物学会講演会, 2017年, 日本語, 国内会議マイクロアレイ法によるOsRbcS1発現抑制イネの遺伝子発現プロファイリング
ポスター発表
- 農芸化学会関西支部会, 2017年, 日本語, 国内会議ソルガム高活性型Rubiscoの小サブユニットを利用したイネの光合成能力の改良
口頭発表（一般）
- 農芸化学会関西支部会, 2017年, 日本語, 国内会議イネにおけるRubisco activase様タンパク質OsRca2の機能解析
口頭発表（一般）
- 日本作物学会 第242回講演会, 2016年09月, 日本語, 龍谷大学瀬田キャンパス, 国内会議浮稲性遺伝子と冠水耐性遺伝子を併せ持つイネ系統の深水伸長応答
ポスター発表
- 日本作物学会 第242回講演会, 2016年09月, 日本語, 龍谷大学瀬田キャンパス, 国内会議水田雑草オモダカとウリカワの塊茎萌芽期の節間伸長の酸素欠乏および二酸化炭素による促進
口頭発表（一般）
- 日本作物学会 第242回講演会, 2016年09月, 日本語, 龍谷大学瀬田キャンパス, 国内会議エチレンとジベレリンが誘導する浮稲節間の伸長促進に及ぼす重力方向と過重力の影響
ポスター発表
- 近畿作物・育種研究会 第181回例会, 2016年05月, 日本語, 国内会議浮稲性遺伝子と冠水耐性遺伝子を併せ持つイネ系統の生理特性
口頭発表（一般）
- 近畿作物・育種研究会 第181回例会, 2016年05月, 日本語, 滋賀県立大学 サテライト教室, 国内会議多年生水田雑草オモダカとウリカワの節間伸長はそれぞれ酸素欠乏と二酸化炭素によって促進される
口頭発表（一般）
- 日本作物学会 第240回講演会, 2015年09月, 日本語, 信州大学長野 (工学) キャンパス, 国内会議野生イネOryza altaおよびO. latifoliaの洪水適応
ポスター発表
- 日本作物学会 第240回講演会, 2015年09月, 日本語, 信州大学長野 (工学) キャンパス, 国内会議浮稲における冠水耐性遺伝子SUB1Aの存在とその機能
口頭発表（一般）
- 日本作物学会 第240回講演会, 2015年09月, 日本語, 信州大学長野 (工学) キャンパス, 国内会議アマゾン野生イネOryza glumaepatulaの深水適応
口頭発表（一般）
- 近畿作物・育種研究会 第179回例会, 2015年05月, 日本語, 奈良県立橿原考古学研究所, 国内会議アマゾン野生イネOryza glumaepatulaの浮稲性について
口頭発表（一般）
- 日本作物学会 第238回講演会, 2014年09月, 日本語, 愛媛大学 城北キャンパス, 国内会議浮稲茎葉部における重力屈性反応へのエクスパンシンの関与
ポスター発表
- 近畿作物・育種研究会 第177回例会, 2014年07月, 日本語, 神戸大学農学部, 国内会議浮稲不定根の成長方向と光の関係
口頭発表（一般）
- 近畿作物・育種研究会 第177回例会, 2014年07月, 日本語, 神戸大学農学部, 国内会議浮稲茎葉部の重力屈性におけるエクスパンシンの関与
口頭発表（一般）
- 近畿作物・育種研究会 第177回例会, 2014年07月, 日本語, 神戸大学農学部, 国内会議浮稲におけるSUB1A遺伝子の存在とその分類
口頭発表（一般）
- 近畿作物・育種研究会 第177回例会, 2014年07月, 日本語, 神戸大学農学部, 国内会議アマゾン野生イネOryza grandiglumisの浮稲性と冠水耐性
口頭発表（一般）
- 11th Conference of the International Society for Plant Anaerobiosis, 2013年10月, 英語, IRRI, Los Baños, Laguna, Philippines, Emergent plants Sagittaria trifolia and S. pygmaea are perennial Alismataceous weeds of paddy field. Those plants mainly propagate vegetatively by tubers. Their sprouting from tubers starts with irrigation for paddling of the rice fields and continues for several months. Sprouting finally leads to emergence of the shoot parts of those plants from the soil. In this study, we cha, 国際会議Tuber sprouting and emergence of Sagittaria trifolia and S. pygmaea: their physiological traits and regulatory mechanisms
ポスター発表
- 日本作物学会 第236回講演会, 2013年09月, 日本語, 鹿児島大学 郡元キャンパス, 国内会議浮稲冠根の成長方向に及ぼす光と重力の影響
ポスター発表
- 日本作物学会 第236回講演会, 2013年09月, 日本語, 鹿児島大学 郡元キャンパス, 国内会議低酸素環境が誘導する浮稲節間の伸長反応
ポスター発表
- 近畿作物・育種研究会 第175回例会, 2013年07月, 日本語, 近畿大学生物理工学部, 国内会議浮稲節間の伸長に及ぼす重力の影響とオーキシンの関与
口頭発表（一般）
- 近畿作物・育種研究会 第175回例会, 2013年07月, 日本語, 近畿大学生物理工学部, 国内会議イネ葉枕の重力屈性は嫌気環境で促進されるがコムギとエンバク葉枕では阻害される
口頭発表（一般）
- 日本作物学会 第232回講演会, 2011年09月, 日本語, 山口大学農学部, 国内会議浮稲節間細胞壁におけるエクスパンシンの反応性に及ぼすフェノール化合物と多糖の影響
ポスター発表
- 日本作物学会 第226回講演会, 2008年09月, 日本語, 神戸大学農学部, 国内会議浮稲節間におけるエクスパンシンに対する細胞壁の反応性と壁構造との関係
ポスター発表
- 日本作物学会 第226回講演会, 2008年09月, 日本語, 神戸大学農学部, 国内会議山口県の水田から見つかったスルホニルウレア抵抗性ミズマツバとアブノメ
口頭発表（一般）
- 種生物学会 第39回種生物シンポジウム, 2007年11月, 日本語, 六甲山YMCA, 国内会議浮稲の深水条件下での節間伸長におけるエクスパンシンの関与
ポスター発表
- 9th Conference of the International Society for Plant Anaerobiosis, 2007年11月, 英語, Matushima, Sendai, Japan, 国際会議Involvement of expansins in internodal elongation of submerged floating rice
ポスター発表
- 日本作物学会 第224回講演会, 2007年09月, 日本語, 金沢大学角間キャンパス, 国内会議浮稲節間の細胞壁におけるエクスパンシンに対する反応性とフェノール性化合物の沈着の関係
口頭発表（一般）
- 日本作物学会 第221回講演会, 2006年03月, 日本語, 東京大学農学部, 国内会議浮稲節間の伸長停止に伴うエクスパンシンの活性と細胞壁反応性の変化
口頭発表（一般）
- 近畿作物・育種研究会 第159回例会, 2005年07月, 日本語, 神戸大学農学部, 国内会議浮稲節間組織における酸が誘導する成長とエクスパンシンとの関係
口頭発表（一般）
- 第４６回日本植物生理学会, 2005年03月, 英語, 新潟, 国内会議Identification of Substrate Specificity and Downstream Events of Arabidopsis AtMEKK1
ポスター発表
- 日本植物生理学会2004年度年会, 2004年, 日本語, 日本植物生理学会, 東京都立大学, 国内会議塩ストレス下の塩生植物Atriplex nummulariaにおけるS-adenosylmethionine synthetaseの発現誘導
口頭発表（一般）
- 日本植物生理学会2004年度年会, 2004年, 日本語, 日本植物生理学会, 東京都立大学, 国内会議アカザ科の植物のグリシンベタイン合成に関わる酵素の転写誘導に関する研究
口頭発表（一般）
- 日本作物学会 第216回講演会, 2003年09月, 日本語, 島根大学生物資源科学部, 国内会議浮稲節間の伸長に伴うエクスパンシンの活性と細胞壁反応性の変化
口頭発表（一般）
- 日本熱帯農業学会 第94回講演会, 2003年09月, 日本語, 佐賀大学農学部, 国内会議浮稲茎葉部の重力屈性反応について
口頭発表（一般）
- 日本作物学会記事, 2003年, 日本語, 未記入, 未記入, 国内会議浮稲節間の伸長に伴うエクスパンシンの活性と細胞壁反応性の変化
口頭発表（一般）
- 日本作物学会記事, 2003年, 日本語, 未記入, 未記入, 国内会議浮稲節間の伸長とエチレンによる蒸散の促進
口頭発表（一般）
- 熱帯農業, 2003年, 日本語, 日本熱帯農業学会, 未記入, 国内会議浮稲茎葉部の重力屈性反応について
口頭発表（一般）