Research activity information

• Oct. 2016 日本作物学会, 日本作物学会 第２４２回講演会優秀発表賞, 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

  SASAYAMA DAISUKE

  Others


• Oct. 2015 日本作物学会, 日本作物学会 第２４０回講演会優秀発表賞, アマゾン野生イネOryza glumaepatulaの深水適応

  SASAYAMA DAISUKE

  Others

• Effects of loss of CO2-Responsive CCT Protein interaction with 14-3-3 proteins and its ectopic expression on starch synthesis in rice.

  Fumihiro Miyagawa, Mai Tohbe, Takumi Tomioka, Toshiki Kanemoto, Daisuke Sasayama, Tomoko Hatanaka, Tetsushi Azuma, Ryutaro Morita, Hiroshi Fukayama

  CO2-Responsive CCT Protein (CRCT) is a transcription factor that positively regulates the expression of starch synthesis-related genes in the vegetative organs of rice. CRCT interacts with 14-3-3 proteins. Yeast two-hybrid analysis showed that the CRCT with the S217A mutation was unable to interact with CRCT. This mutated CRCT was introduced into the CRCT knockout rice. The transcript of CRCT-S217A was detected significantly by qRT-PCR, but not by immunoblotting. Nevertheless, starch accumulation and the expression of starch synthesis-related genes in the leaf sheath of the transformants were higher than those of the CRCT knockout line. These results suggest the possibility that 14-3-3 proteins may stabilize CRCT through their interaction, while free unstable CRCT can promote starch synthesis. CRCT was shown to be highly expressed in the vascular bundle and is hypothesized to move to the starch-accumulating storage parenchyma cells in leaf sheaths. To investigate this hypothesis, we generated transgenic lines expressing CRCT ectopically in the CRCT knockout line background. Transgenic lines expressing CRCT using Sucrose transpor1 promoter, known to express specifically in vascular tissues, and the Chlorophyll a/b binding protein promoter, known to express highly in photosynthetic tissues, showed recovered starch accumulation in the leaf sheath. These results suggest that CRCT can move from an unspecified cell to storage parenchyma cells via the vascular bundle to regulate starch synthesis. This study can provide new insight into the regulation mechanism of starch biosynthesis in the vegetative organs.

  Jul. 2026, Plant science : an international journal of experimental plant biology, 368, 113157 - 113157, English, International magazine

  Scientific journal


• Responses of the Australian Wild Rice Oryza meridionalis to Complete Submergence

  Shangmin Yuan, Daisuke Sasayama, Tomoko Hatanaka, Hiroshi Fukayama, Tetsushi Azuma

  May 2026, Tropical Plant Biology, 19, 15, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• AtCRCT1 and AtCRCT2 , homologues of CO 2   Responsive CCT Protein in Arabidopsis thaliana , are involved in the regulation of starch synthesis-related gene expression

  Hiroshi Fukayama, Ryosuke Toge, Nozumu Chuuma, Asuka Masaki, Hikaru Hagiwara, Fumihiro Miyagawa, Daisuke Sasayama, Tomoko Hatanaka, Tetsushi Azuma, Ryutaro Morita

  Abstract CO2-Responsive CCT Protein (CRCT) is a transcription factor that regulates the expression of starch synthesis-related genes, and consequently starch content in the vegetative organs of rice. Two CRCT homologues, AtCRCT1 and AtCRCT2, were identified in the genome of Arabidopsis thaliana. AtCRCT1 and AtCRCT2 were expressed in most organs of the plant, and AtCRCT2 in particular was expressed in their vascular bundles. The expression of these genes was markedly upregulated by sucrose treatment and tended to increase under elevated CO2 condition. The overexpression or knockout of these genes did not have a notable effect on the growth of Arabidopsis. On the other hand, the expression of some starch synthesis-related genes, such as ADP-glucose pyrophosphorylase large subunit3 (AtAPL3) and glucose 6-phosphate/Pi transporter2 (AtGPT2) was significantly upregulated in the overexpression lines. Accordingly, the expression of AtAPL3 and AtGPT2 in the double knockout line was significantly lower than that in wild-type (Col-0) under sucrose treatment. In addition, the starch content of the double knockout line at the end of the night was slightly lower than that of Col-0. Yeast two-hybrid and BiFC analyses demonstrated that both AtCRCT1 and AtCRCT2 interact with Growth Regulation Factor 7, a 14-3-3 protein. These results suggest that AtCRCT1 and AtCRCT2 have similar molecular and physiological functions to CRCT in rice and regulate the expression of some starch synthesis-related genes. However, their effects are limited and cannot markedly affect starch content, unlike CRCT in rice.

  Oxford University Press (OUP), Jan. 2026, Plant and Cell Physiology

  Scientific journal


• Trampling-induced ethylene production delays spikelet initiation in spring wheat

  Akina Mizumoto, Daisuke Sasayama, Riona Osaki, Kota Nishimura, Tetsushi Azuma

  Corresponding, Elsevier BV, Sep. 2025, Crop and Environment, 4(3) (3), 168 - 172, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Submergence-Tolerant Rice Cultivar FR13A Harbors Floating Genes SNORKELs but Lacks Floating Ability

  Daisuke Sasayama, Natsuki Hayashi, Shunsuke Oe, Hiroshi Fukayama, Tomoko Hatanaka, Tetsushi Azuma

  Lead, Elsevier BV, Mar. 2025, Rice Science, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Difference in responsiveness of expressions of starch synthesis-related genes to CRCT among rice cultivars

  Fumihiro Miyagawa, Ryutaro Morita, Mai Tohbe, Daisuke Sasayama, Tomoko Hatanaka, Tetsushi Azuma, Hiroshi Fukayama

  Informa UK Limited, Apr. 2024, Plant Production Science, 27(3) (3), 221 - 228

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Effects of knockout of CO₂-responsive CCT protein, a regulator of starch synthesis on physiological characteristics of rice

  Fumihiro Miyagawa, Naoki Shibatani, Ryutaro Morita, Daisuke Sasayama, Tomoko Hatanaka, Tetsushi Azuma, Hiroshi Fukayama

  Informa UK Limited, Jul. 2023, Plant Production Science, 26(3) (3), 273 - 286, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Deepwater response in the African cultivated rice Oryza glaberrima

  Quanshu Luo, Daisuke Sasayama, Misaki Nakazawa, Tomoko Hatanaka, Hiroshi Fukayama, Tetsushi Azuma

  Lead, Informa UK Limited, Jan. 2023, Plant Production Science, 26(1) (1), 1 - 11, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Adaptive responses to flooding in wild rice species with various genomes other than AA

  Daisuke Sasayama, Mayuko Niikawa, Tomoko Hatanaka, Hiroshi Fukayama, Tetsushi Azuma

  Lead, Informa UK Limited, Jul. 2022, Plant Production Science, 25(3) (3), 350 - 358, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Control of growth direction in crown roots in rice germinated seedlings by light

  Kako Matsumoto, Daisuke Sasayama, Tomoko Hatanaka, Hiroshi Fukayama, Tetsushi Azuma

  Jul. 2022, Journal of Crop Research, 67, 51 - 55, English

  [Refereed]

  Scientific journal


• Internodal elongation under submergence in Oryza sativa/Oryza glumaepatula introgression lines

  Daisuke Sasayama, Shangmin Yuan, Tomoko Hatanaka, Hiroshi Fukayama, Tetsushi Azuma

  Lead, Jul. 2022, Journal of Crop Research, 67, 35 - 40, English

  [Refereed]

  Scientific journal


• Different DGAT1s vary widely in function and a targeted amino acid substitution enhances oil accumulation

  Tomoko Hatanaka, Yoshiki Tomita, Daisuke Matsuoka, Daisuke Sasayama, Hiroshi Fukayama, Tetsushi Azuma, Mohammad Fazel Soltani Gishini, David Hildebrand

  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 DGAT activity of Vernonia DGAT1 was distinctively higher than that of Arabidopsis DGAT1 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 to wild-type) followed by soybean and castor bean. Most Arabidopsis DGAT1 over-expressing lines did not show a significant increase. In addition to these four DGAT1s, 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 more than 10 times 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 performed by site-directed mutagenesis and substantially increased the TAG content.

  Oxford University Press (OUP), Mar. 2022, Journal of Experimental Botany, 73(9) (9), 3030 - 3043, English, International magazine

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Growth responses of seedlings under complete submergence in rice cultivars carrying both the submergence-tolerance gene SUB1A-1 and the floating genes SNORKELs

  Shunsuke Oe, Daisuke Sasayama, Quanshu Luo, Hiroshi Fukayama, Tomoko Hatanaka, Tetsushi Azuma

  Lead, Jan. 2022, Plant Production Science, 25(1) (1), 70 - 77, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• CO₂-responsive CCT protein interacts with 14-3-3 proteins and controls the expression of starch synthesis-related genes

  Hiroshi Fukayama, Fumihiro Miyagawa, Naoki Shibatani, Aiko Koudou, Daisuke Sasayama, Tomoko Hatanaka, Tetsushi Azuma, Yasuo Yamauchi, Daisuke Matsuoka, Ryutaro Morita

  Aug. 2021, PLANT CELL AND ENVIRONMENT, 44(8) (8), 2480 - 2493, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Responses to Complete Submergence in African Rice (Oryza glaberrima)

  Quanshu Luo, Misaki Nakazawa, Daisuke Sasayama, Hiroshi Fukayama, Tomoko Hatanaka, Tetsushi Azuma

  Jun. 2020, Journal of Crop Research, 65, 37 - 41, English

  [Refereed]

  Scientific journal


• Rubisco small subunits of C₄ plants, Napier grass and guinea grass confer C₄-like catalytic properties on Rubisco in rice

  Hiroshi Fukayama, Takashi Kobara, Keita Shiomi, Ryutaro Morita, Daisuke Sasayama, Tomoko Hatanaka, Tetsushi Azuma

  Informa UK Limited, Apr. 2019, Plant Production Science, 22(2) (2), 296 - 300

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Expression level of Rubisco activase negatively correlates with Rubisco content in transgenic rice

  Hiroshi Fukayama, Akina Mizumoto, Chiaki Ueguchi, Jun Katsunuma, Ryutaro Morita, Daisuke Sasayama, Tomoko Hatanaka, Tetsushi Azuma

  Sep. 2018, Photosynthesis Research, 137(3) (3), 465 - 474, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Internodal elongation under submergence in the Amazonian wild rice species Oryza glumaepatula: the growth response is induced by hypoxia but not by ethylene

  Daisuke Sasayama, Takuma Okishio, Tatsuya Hirano, Hiroshi Fukayama, Tomoko Hatanaka, Masahiro Akimoto, Tetsushi Azuma

  Lead, Springer Science and Business Media LLC, May 2018, Plant Growth Regulation, 85(1) (1), 123 - 132

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Promotion of first internode elongation in perennial paddy weeds Sagittaria trifolia and Sagittaria pygmaea tubers by oxygen depletion and carbon dioxide

  Daisuke Sasayama, Kenta Ikemachi, Hisateru Sakai, Hiroshi Fukayama, Kazuyuki Itoh, Tetsushi Azuma

  Lead, Dec. 2016, WEED BIOLOGY AND MANAGEMENT, 16(4) (4), 147 - 156, English

  [Refereed]

  Scientific journal


• The M3 Phosphorylation Site Is Required for Trafficking and Biological Roles of PIN-FORMED1, 2, and 7 in Arabidopsis

  Daeeun Ki, Daisuke Sasayama, Hyung-Taeg Cho

  Sep. 2016, FRONTIERS IN PLANT SCIENCE, 7, 1479, English

  [Refereed]

  Scientific journal


• Relationship between the temperature and the overwintering of water lettuce (Pistia stratiotes) at Kowataike, a branch of Yodogawa River, Japan

  Katsuya Tamada, Kazuyuki Itoh, Yuko Uchida, Shunsuke Higuchi, Daisuke Sasayama, Tetsushi Azuma

  Mar. 2015, WEED BIOLOGY AND MANAGEMENT, 15(1) (1), 20 - 26, English

  [Refereed]

  Scientific journal


• Ethylene is not involved in adaptive responses to flooding in the Amazonian wild rice species Oryza grandiglumis

  Takuma Okishio, Daisuke Sasayama, Tatsuya Hirano, Masahiro Akimoto, Kazuyuki Itoh, Tetsushi Azuma

  Lead, Feb. 2015, JOURNAL OF PLANT PHYSIOLOGY, 174, 49 - 54, English

  [Refereed]

  Scientific journal


• Growth promotion and inhibition of the Amazonian wild rice species Oryza grandiglumis to survive flooding

  Takuma Okishio, Daisuke Sasayama, Tatsuya Hirano, Masahiro Akimoto, Kazuyuki Itoh, Tetsushi Azuma

  Sep. 2014, PLANTA, 240(3) (3), 459 - 469, English

  [Refereed]

  Scientific journal


• The M3 phosphorylation motif has been functionally conserved for intracellular trafficking of long-looped PIN-FORMEDs in the Arabidopsis root hair cell

  Daisuke Sasayama, Anindya Ganguly, Minho Park, Hyung-Taeg Cho

  Lead, Nov. 2013, BMC PLANT BIOLOGY, 13(1) (1), 189, English

  [Refereed]

  Scientific journal


• Anoxia promotes gravitropic curvature in rice pulvini but inhibits it in wheat and oat pulvini

  Tetsushi Azuma, Yoshitaka Inoue, Yuma Hamada, Takuma Okishio, Daisuke Sasayama, Kazuyuki Itoh

  Sep. 2013, JOURNAL OF PLANT PHYSIOLOGY, 170(13) (13), 1158 - 1164, English

  [Refereed]

  Scientific journal


• Over-expression of MAP3Kδ4, an ABA-inducible Raf-like MAP3K that confers salt tolerance in Arabidopsis

  Nariko Shitamichi, Daisuke Matsuoka, Daisuke Sasayama, Tomoyuki Furuya, Takashi Nanmori

  May 2013, PLANT BIOTECHNOLOGY, 30(2) (2), 111 - 118, English

  [Refereed]

  Scientific journal


• MAP3Kδ4, an Arabidopsis Raf-like MAP3K, regulates plant growth and shoot branching

  Daisuke Sasayama, Daisuke Matsuoka, Mariko Oka, Nariko Shitamichi, Tomoyuki Furuya, Tetsushi Azuma, Kazuyuki Itoh, Takashi Nanmori

  Lead, Dec. 2011, PLANT BIOTECHNOLOGY, 28(5) (5), 463 - 470, English

  [Refereed]

  Scientific journal


• Involvement of Plant Hormones in the Gravitropic Response of Floating Rice Pulvini and Effect of Submergence on the Response

  東 哲司, Yoshitaka Inoue, Chiharu Kishida, 笹山 大輔, Takuma Okishio, 伊藤 一幸

  Sep. 2011, Tropical Agriculture and Development, 55, 113 - 117, English

  [Refereed]

  Scientific journal


• Characterization of gravitropic response of leaf-sheath pulvini in floating rice

  東 哲司, Yuko Takenaga, 笹山 大輔, Yoshitaka Inoue, Takuma Okishio, 伊藤 一幸

  Sep. 2011, Tropical Agriculture and Development, 55, 108 - 112, English

  [Refereed]

  Scientific journal


• Involvement of cell wall-bound phenolic acids in decrease in cell wall susceptibility to expansins during the cessation of rapid growth in internodes of floating rice

  Daisuke Sasayama, Tetsushi Azuma, Kazuyuki Itoh

  Lead, Jan. 2011, JOURNAL OF PLANT PHYSIOLOGY, 168(2) (2), 121 - 127, English

  [Refereed]

  Scientific journal


• A splice variant of Arabidopsis mitogen-activated protein kinase and its regulatory function in the MKK6-MPK13 pathway

  Wen-Yong Lin, Daisuke Matsuoka, Daisuke Sasayama, Takashi Nanmori

  Mar. 2010, PLANT SCIENCE, 178(3) (3), 245 - 250, English

  [Refereed]

  Scientific journal


• Changes in expansin activity and cell wall susceptibility to expansin action during cessation of internodal elongation in floating rice

  Daisuke Sasayama, Tetsushi Azuma, Kazuyuki Itoh

  Lead, Jan. 2009, PLANT GROWTH REGULATION, 57(1) (1), 79 - 88, English

  [Refereed]

  Scientific journal


• Suppression and promotion of growth by ethylene in rice seedlings depends on ambient humidity

  Tetsushi Azuma, Takenori Honda, Ayako Sadai, Daisuke Sasayama, Kazuyuki Itoh

  Dec. 2007, JOURNAL OF PLANT PHYSIOLOGY, 164(12) (12), 1683 - 1687, English

  [Refereed]

  Scientific journal


• Involvement of acid-induced growth and expansin action in the internodal elongation of submerged floating rice

  笹山 大輔, 東 哲司, 南森 隆司, 安田 武司

  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

  Lead, 日本熱帯農業学会, Sep. 2007, Japanese Journal of Tropical Agriculture, 51(3) (3), 95 - 101, English

  [Refereed]

  Scientific journal

• Regulation of the polarity of protein trafficking by phosphorylation

  Anindya Ganguly, Daisuke Sasayama, Hyung-Taeg Cho

  May 2012, MOLECULES AND CELLS, 33(5) (5), 423 - 430, English

  [Refereed]

  Book review


• Growth in Internodes of Floating Rice: Hormonal Regulations and Cell Wall Modifications

  Tetsushi Azuma, Daisuke Sasayama, Kazuyuki Itoh

  Floating rice is the only crop that can be grown in flood plains because of the capacity to elongate internodes rapidly under conditions of flooding. The mechanisms of growth adaptation to flooding stress have been investigated from ecological, morphological, genetical, physiological, biochemical and molecular biological points of view. In this review, we mainly describe our r

  Jan. 2009, Japanese Journal of Crop Science, 78, 1 - 8, Japanese

  [Refereed]

  Introduction scientific journal

• 日本・世界のイネコアコレクションにおける幼植物体の低温ストレス耐性

  高橋紗弥, 畠中知子, 深山浩, 東哲司, 笹山大輔

  日本作物学会第 256 回講演会, Sep. 2023, Japanese

  Poster presentation


• 日本在来イネ・コアコレクションにおける幼苗期の高温耐性品種の探索

  大橋麻羽衣, 畠中知子, 深山浩, 東哲司, 笹山大輔

  日本作物学会第 256 回講演会, Sep. 2023, Japanese

  Poster presentation


• 外生WRI1発現は種子油の含有量と脂肪酸組成に影響を及ぼす

  畠中知子, 冨田典希, 村上廣明, 福井花菜, 笹山大輔, 深山浩, 東哲司

  日本作物学会 第252回講演会, Sep. 2021, Japanese

  Oral presentation


• エチレンに依存しない浮稲節間の深水下での伸長

  有地菜緒, 笹山大輔, 深山浩, 畠中知子, 東哲司

  日本作物学会 第252回講演会, Sep. 2021, Japanese

  Oral presentation


• SNORKELs and Deepwater Responses in the African Cultivated Rice Oryza glaberrima

  Quanshu Luo, Misaki Nakazawa, Daisuke Sasayama, Tomoko Hatanaka, Hiroshi Fukayama, Tetsushi Azuma

  10th Asian Crop Science Association Conference, Sep. 2021, English

  Oral presentation


• Adaptive Responses to Flood in Wild Rice Species with Various Genomes Other Than AA

  Daisuke Sasayama, Mayuko Niikawa, Tomoko Hatanaka, Hiroshi Fukayama, Tetsushi Azuma

  10th Asian Crop Science Association Conference, Sep. 2021, English

  Oral presentation


• DGAT1s from Different Plant Species Show Different Triacylglycerol Biosynthesis Activities

  Tomoko Hatanaka, Wakana Miyashita, Kouki Shibutani, Daisuke Matsuoka, Daisuke Sasayama, Hiroshi Fukayama, Tetsushi Azuma, David F. Hildebrand

  10th Asian Crop Science Association Conference, Sep. 2021, English

  Poster presentation


• Highly Active Vernonia galamensis DGAT1 Can Effectively Increase Oil Levels in Yeast, Soybean and Arabidopsis

  Tomoko Hatanaka, Yoshiki Tomita, Choi-Wing Chau, Honoka Ito, Daisuke Sasayama, Hiroshi Fukayama, Tetsushi Azuma, David F. Hildebrand

  10th Asian Crop Science Association Conference, Sep. 2021, English

  Oral presentation


• A Challenge for the Improvement of Photosynthetic Capacity by the Introduction of C4-Like Rubisco in Rice

  Hiroshi Fukayama, Keita Shiomi, Yuri Taketani, Hiroki Yoshikawa, Daisuke Sasayama, Tomoko Hatanaka, Tetsushi Azuma, Takuya Yoshizawa, Shun-Ichi Tanaka, Hiroyoshi Matsuura

  10th Asian Crop Science Association Conference, Sep. 2021, English


• 浮稲性遺伝子SNORKEL1/2を持たない浮稲品種の特徴

  有地菜緒, 笹山大輔, 深山浩, 畠中知子, 東哲司

  近畿作物・育種研究会 第190回例会, Jun. 2021, Japanese

  Oral presentation


• Oryza sativa/Oryza glumaepatula染色体置換系統の浮稲性の解析

  笹山 大輔, 新川 麻由子, 遠藤 宏朗, 袁 尚民, 深山 浩, 畠中 知子, 東 哲司

  近畿作物・育種研究会 第 189 回例会, Dec. 2020, Japanese

  Oral presentation


• アフリカイネ Oryza glaberrima における冠水に対する応答

  羅 全淑, 中澤 美沙希, 笹山 大輔, 畠中 知子, 深山 浩, 東 哲司

  日本作物学会 第250回講演会, Sep. 2020, Japanese

  Oral presentation


• 高温前処理によるイネメソコチルの伸長促進反応 -植物ホルモンの関与と深播き耐性の改善-

  武村 友萌, 笹山 大輔, 深山 浩, 畠中 知子, 東 哲司

  日本作物学会 第248回講演会, Sep. 2019, Japanese, とりぎん文化会館, Domestic conference

  Poster presentation


• イネAAゲノム種の洪水適応 -Oryza longistaminataの洪水応答-

  藤原 将平, 笹山 大輔, 畠中 知子, 深山 浩, 東 哲司

  日本作物学会 第248回講演会, Sep. 2019, Japanese, とりぎん文化会館, Domestic conference

  Poster presentation


• AAタイプ以外のゲノムをもつ野生イネ種の洪水応答

  笹山 大輔, 新川 麻由子, 畠中 知子, 深山 浩, 東 哲司

  日本作物学会 第248回講演会, Sep. 2019, Japanese, とりぎん文化会館, Domestic conference

  Poster presentation


• Vernonia galamensis DGAT1 can increase Arabidopsis seed oil level more than other DGAT1s

  HATANAKA TOMOKO, 冨田 典希, 周 采穎, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI, DAVID F. HILDEBRAND

  第31回植物脂質シンポジウム, Nov. 2018, Japanese, 高知大学, Domestic conference

  Poster presentation


• Vernonia galamensis DGAT1 can increase Arabidopsis seed oil content more than other DGAT1s

  HATANAKA TOMOKO, YOSHIKI TOMITA, CHOI-WING CHAU, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI, DAVID F. HILDEBRAND

  The 14th International Symposium on Biocatalysis and Agricultural Biotechnology, Oct. 2018, English, Kuala Lumpur, Malaysia, International conference

  Poster presentation


• Analysis of Floating Response of South American Wild Rice Oryza glumaepatula

  NIIKAWA MAYUKO, ENDO HIROAKI, SASAYAMA DAISUKE, HATANAKA TOMOKO, FUKAYAMA HIROSHI, AZUMA TETSUSHI

  日本作物学会第246回講演会, Sep. 2018, Japanese, 北海道大学農学部, Domestic conference

  Poster presentation


• Structure-Function Relationship of Hybrid Rubisco Consisting of Sorghum RbcS and Rice RbcL

  SHIOMI KEITA, SASAYAMA DAISUKE, HATANAKA TOMOKO, AZUMA TETSUSHI, YOSHIKAWA HIROKI, MATSUMURA HIROYOSHI, FUKAYAMA HIROSHI

  日本作物学会第246回講演会, Sep. 2018, Japanese, 北海道大学農学部, Domestic conference

  Oral presentation


• Growth response of the African cultivated rice Oryza glaberrima and its wild ancestor Oryza barthii to flooding

  Luo Quanshu, NAKAZAWA MISAKI, SASAYAMA DAISUKE, HATANAKA TOMOKO, FUKAYAMA HIROSHI, AZUMA TETSUSHI

  日本作物学会第246回講演会, Sep. 2018, Japanese, 北海道大学農学部, Domestic conference

  Poster presentation


• Highly active Vernonia galamensis DGAT1 can effectively increase oil levels in yeast, soybean and Arabidopsis

  HATANAKA TOMOKO, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI, MATSUOKA DAISUKE, TOMITA YOSHIKI, CHAU CHOI-WING, MIYASHITA WAKANA, SERSON WILLIAM, LI RUNZHI, ARMSTRONG PAUL, YU KESHUN, PFEIFFER TODD, LI XI-LE, HILDEBRAND DAVID

  The 23rd International Symposium on Plant Lipids, Jul. 2018, English, Yokohama, Japan, International conference

  Poster presentation


• 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

  羅 全淑, 中澤 美沙希, SASAYAMA DAISUKE, HATANAKA TOMOKO, FUKAYAMA HIROSHI, AZUMA TETSUSHI

  近畿作物・育種研究会 第185回例会, Jun. 2018, Japanese, Domestic conference

  Oral presentation


• シロイヌナズナにおける CRCT オーソログの機能解析

  萩原輝, 中馬望, MATSUOKA DAISUKE, SASAYAMA DAISUKE, HATANAKA TOMOKO, AZUMA TETSUSHI, FUKAYAMA HIROSHI

  日本作物学会講演会, 2018, Japanese, Domestic conference

  Poster presentation


• イネの Rubisco activase 様タンパク質 Rca2 は Rubisco activase の機能を阻害する

  水本晃那, 小林亜希子, 山内靖雄, MATSUOKA DAISUKE, SASAYAMA DAISUKE, HATANAKA TOMOKO, AZUMA TETSUSHI, FUKAYAMA HIROSHI

  日本作物学会講演会, 2018, Japanese, Domestic conference

  Poster presentation


• イネRubisco activase様タンパク質OsRca2はRubiscoの活性化を阻害する

  水本晃那, 小林亜希子, MATSUOKA DAISUKE, YAMAUCHI YASUO, SASAYAMA DAISUKE, HATANAKA TOMOKO, AZUMA TETSUSHI, FUKAYAMA HIROSHI

  日本光合成学会講演会, 2018, Japanese, Domestic conference

  Poster presentation


• Functional analysis of Rubisco small subunit, OsRbcS1, that is not expressed in photosynthetic organs in rice

  小林 則之, 森田 耕一, SASAYAMA DAISUKE, HATANAKA TOMOKO, AZUMA TETSUSHI, FUKAYAMA HIROSHI

  International Symposium on Photosynthesis and Chloroplast Biogenesis, 2018, English, Domestic conference

  Poster presentation


• 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

  小原崇, SASAYAMA DAISUKE, HATANAKA TOMOKO, AZUMA TETSUSHI, FUKAYAMA HIROSHI

  日本作物学会講演会, 2018, Japanese, Domestic conference

  Poster presentation


• Highly active Vernonia galamensis DGAT1 can effectively increase seed oil levels in soybean and Arabidopsis

  HATANAKA TOMOKO, TOMITA YOSHIKI, Chau, Choi-Wing, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI, William Serson, Runzhi Li, Paul Armstrong, Keshun Yu, Todd Pfeiffer, Xi-Le Li, David F. Hildebrand

  The 7th Asian Symposium on Plant Lipid, Nov. 2017, English, Taipei, Taiwan, International conference

  Poster presentation


• 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

  尾江 俊祐, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, HATANAKA TOMOKO, AZUMA TETSUSHI

  日本作物学会第244回講演会, Sep. 2017, Japanese, 岐阜大学, Domestic conference

  Poster presentation


• 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

  遠藤 宏朗, 新川 麻由子, SASAYAMA DAISUKE, HATANAKA TOMOKO, FUKAYAMA HIROSHI, AZUMA TETSUSHI

  日本作物学会第244回講演会, Sep. 2017, Japanese, 岐阜大学, Domestic conference

  Poster presentation


• 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

  冨田 一嘉, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, HATANAKA TOMOKO, AZUMA TETSUSHI

  日本作物学会第244回講演会, Sep. 2017, Japanese, 岐阜大学, Domestic conference

  Poster presentation


• Does Vernonia DGAT1 show a higher activity than other DGAT1s in Arabidopsis seed?

  HATANAKA TOMOKO, TOMITA YOSHIKI, CHAU CHOI-WING, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI, David F. Hildebrand

  日本作物学会 第244回講演会, Sep. 2017, Japanese, 岐阜大学, Domestic conference

  Poster presentation


• シロイヌナズナにおけるベルノニアDGAT1の働き

  HATANAKA TOMOKO, TOMITA YOSHIKI, CHAU CHOI-WING, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI, David F. Hildebrand

  第30回植物脂質シンポジウム, Sep. 2017, Japanese, お茶の水大学, Domestic conference

  Poster presentation


• Vernonia DGAT1 can increase Arabidopsis seed oil content more than other DGAT1s

  HATANAKA TOMOKO, TOMITA YSHIKI, CHAU CHOI-WING, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI, HILDEBRAND, D. F

  Plant Biology 2017, Jun. 2017, English, 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), International conference

  Poster presentation


• 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

  森田 耕一, SASAYAMA DAISUKE, AZUMA TETSUSHI, FUKAYAMA HIROSHI

  日本作物学会講演会, 2017, Japanese, Domestic conference

  Poster presentation


• 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

  塩見慶太, 山本滉樹人, HATANAKA TOMOKO, SASAYAMA DAISUKE, AZUMA TETSUSHI, FUKAYAMA HIROSHI

  農芸化学会関西支部会, 2017, Japanese, Domestic conference

  Oral presentation


• イネにおけるRubisco activase様タンパク質OsRca2の機能解析

  水本晃那, 小林亜希子, HATANAKA TOMOKO, SASAYAMA DAISUKE, AZUMA TETSUSHI, FUKAYAMA HIROSHI

  農芸化学会関西支部会, 2017, Japanese, Domestic conference

  Oral presentation


• 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

  OE SHUNSUKE, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI

  日本作物学会 第242回講演会, Sep. 2016, Japanese, 龍谷大学瀬田キャンパス, Domestic conference

  Poster presentation


• 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

  SASAYAMA DAISUKE, FUKAYAMA HIROSHI, ITOH KAZUYUKI, AZUMA TETSUSHI

  日本作物学会 第242回講演会, Sep. 2016, Japanese, 龍谷大学瀬田キャンパス, Domestic conference

  Oral presentation


• 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

  NAKATANI YUMI, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI

  日本作物学会 第242回講演会, Sep. 2016, Japanese, 龍谷大学瀬田キャンパス, Domestic conference

  Poster presentation


• 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

  OE SHUNSUKE, SASAYAMA DAISUKE, FUKAYAMA HIROSHI, AZUMA TETSUSHI

  近畿作物・育種研究会 第181回例会, May 2016, Japanese, Domestic conference

  Oral presentation


• 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

  SASAYAMA DAISUKE, FUKAYAMA HIROSHI, ITOH KAZUYUKI, AZUMA TETSUSHI

  近畿作物・育種研究会 第181回例会, May 2016, Japanese, 滋賀県立大学 サテライト教室, Domestic conference

  Oral presentation


• 野生イネOryza altaおよびO. latifoliaの洪水適応

  平井 雄基, SASAYAMA DAISUKE, AZUMA TETSUSHI

  日本作物学会 第240回講演会, Sep. 2015, Japanese, 信州大学長野 (工学) キャンパス, Domestic conference

  Poster presentation


• 浮稲における冠水耐性遺伝子SUB1Aの存在とその機能

  岩見 裕太, SASAYAMA DAISUKE, AZUMA TETSUSHI

  日本作物学会 第240回講演会, Sep. 2015, Japanese, 信州大学長野 (工学) キャンパス, Domestic conference

  Oral presentation


• アマゾン野生イネOryza glumaepatulaの深水適応

  SASAYAMA DAISUKE, 平井 雄基, AZUMA TETSUSHI

  日本作物学会 第240回講演会, Sep. 2015, Japanese, 信州大学長野 (工学) キャンパス, Domestic conference

  Oral presentation


• アマゾン野生イネOryza glumaepatulaの浮稲性について

  SASAYAMA DAISUKE, AZUMA TETSUSHI

  近畿作物・育種研究会 第179回例会, May 2015, Japanese, 奈良県立橿原考古学研究所, Domestic conference

  Oral presentation


• 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

  田口 あみ, SASAYAMA DAISUKE, ITOH KAZUYUKI, AZUMA TETSUSHI

  日本作物学会 第238回講演会, Sep. 2014, Japanese, 愛媛大学 城北キャンパス, Domestic conference

  Poster presentation


• 浮稲不定根の成長方向と光の関係

  坪田 裕樹, SASAYAMA DAISUKE, ITOH KAZUYUKI, AZUMA TETSUSHI

  近畿作物・育種研究会 第177回例会, Jul. 2014, Japanese, 神戸大学農学部, Domestic conference

  Oral presentation


• 浮稲茎葉部の重力屈性におけるエクスパンシンの関与

  田口 あみ, SASAYAMA DAISUKE, ITOH KAZUYUKI, AZUMA TETSUSHI

  近畿作物・育種研究会 第177回例会, Jul. 2014, Japanese, 神戸大学農学部, Domestic conference

  Oral presentation


• 浮稲におけるSUB1A遺伝子の存在とその分類

  岩見 裕太, SASAYAMA DAISUKE, ITOH KAZUYUKI, AZUMA TETSUSHI

  近畿作物・育種研究会 第177回例会, Jul. 2014, Japanese, 神戸大学農学部, Domestic conference

  Oral presentation


• アマゾン野生イネOryza grandiglumisの浮稲性と冠水耐性

  置塩 琢磨, SASAYAMA DAISUKE, 平野 達也, 秋本 正博, ITOH KAZUYUKI, AZUMA TETSUSHI

  近畿作物・育種研究会 第177回例会, Jul. 2014, Japanese, 神戸大学農学部, Domestic conference

  Oral presentation


• Tuber sprouting and emergence of Sagittaria trifolia and S. pygmaea: their physiological traits and regulatory mechanisms

  笹山 大輔, Kenta Ikemachi, Hisateru Sakai, 伊藤 一幸, 東 哲司

  11th Conference of the International Society for Plant Anaerobiosis, Oct. 2013, English, 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, International conference

  Poster presentation


• Effect of gravity and light on growth direction in crown roots of floating rice

  坪田 裕樹, 笹山 大輔, 伊藤 一幸, 東 哲司

  日本作物学会 第236回講演会, Sep. 2013, Japanese, 鹿児島大学 郡元キャンパス, Domestic conference

  Poster presentation


• 低酸素環境が誘導する浮稲節間の伸長反応

  原田 翔平, 伊藤 俊輔, 笹山 大輔, 平野 達也, 伊藤 一幸, 東 哲司

  日本作物学会 第236回講演会, Sep. 2013, Japanese, 鹿児島大学 郡元キャンパス, Domestic conference

  Poster presentation


• 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

  石原 瑠璃子, SASAYAMA DAISUKE, ITOH KAZUYUKI, AZUMA TETSUSHI

  近畿作物・育種研究会 第175回例会, Jul. 2013, Japanese, 近畿大学生物理工学部, Domestic conference

  Oral presentation


• 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

  AZUMA TETSUSHI, 井上 義隆, 濱田 友馬, SASAYAMA DAISUKE, ITOH KAZUYUKI

  近畿作物・育種研究会 第175回例会, Jul. 2013, Japanese, 近畿大学生物理工学部, Domestic conference

  Oral presentation


• Arabidopsis Raf-like MAPKKK, MAP3Kδ4 regulates plant growth.

  MATSUOKA DAISUKE, 岡 麻里子, 下道 奈里子, 杉本 紘基, SASAYAMA DAISUKE, NANMORI TAKASHI

  第５４回日本植物生理学会年会, Mar. 2013, Japanese, 岡山大学, Domestic conference

  Oral presentation


• Long-looped PIN-FORMEDs Require the Conserved M3 Phosphorylation Motif for Regulation of Their Intracellular Trafficking in Arabidopsis

  笹山 大輔, Anindya Ganguly, Minho Park, Sang Ho Lee, Hyung-Taeg Cho

  4th International Auxin Meeting, Dec. 2012, English, Waikoloa Beach Marriott Resort & Spa, Hawai’i Island, USA, International conference

  Poster presentation


• The M3 Phosphorylation Code Has Been Functionally Conserved Among Long-looped PIN-FORMEDs for Regulation of Their Intracellular Trafficking in the Arabidopsis Root Hair Cell

  笹山 大輔, Anindya Ganguly, Minho Park, Sang Ho Lee, Hyung-Taeg Cho

  Korean Society for Molecular and Cellular Biology 2012 Annual Meeting, Oct. 2012, English, COEX, Seoul, KOREA, Domestic conference

  Poster presentation


• The M3 Phosphorylation Code Has Been Functionally Conserved Among Long-looped PIN-FORMEDs for Regulation of Their Intracellular Trafficking in the Arabidopsis Root Hair Cell

  笹山 大輔, Anindya Ganguly, Minho Park, Sang Ho Lee, Hyung-Taeg Cho

  10th International Congress on Plant Molecular Biology, Oct. 2012, English, ICC, Jeju Island, Republic of Korea, International conference

  Poster presentation


• シロイヌナズナMAP3Kδ4過剰発現体の塩ストレス耐性について

  SHITAMICHI NARIKO, MATSUOKA DAISUKE, SASAYAMA DAISUKE, NANMORI TAKASHI

  日本植物細胞分子生物学会 第30回大会, Aug. 2012, Japanese, 奈良先端科学技術大学院大学, Domestic conference

  Oral presentation


• シロイヌナズナMAP3Kδ4による枝分かれ制御について

  MATSUOKA DAISUKE, OKA MARIKO, SASAYAMA DAISUKE, NANMORI TAKASHI

  日本植物細胞分子生物学会 第30回大会, Aug. 2012, Japanese, 奈良先端科学技術大学院大学, Domestic conference

  Oral presentation


• 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

  太田 健介, SASAYAMA DAISUKE, ITOH KAZUYUKI, AZUMA TETSUSHI

  日本作物学会 第232回講演会, Sep. 2011, Japanese, 山口大学農学部, Domestic conference

  Poster presentation


• シロイヌナズナMAPKKK（MAP3Kδ4）の過剰発現は成長促進とストレス耐性を付与する

  SHITAMICHI NARIKO, SASAYAMA DAISUKE, MATSUOKA DAISUKE, NANMORI TAKASHI

  日本植物細胞分子生物学会 第29回大会, Sep. 2011, Japanese, 九州大学箱崎キャンパス, Domestic conference

  Oral presentation


• シロイヌナズナMAP3Kδ4の植物ホルモン応答性について

  岡 麻理子, SASAYAMA DAISUKE, MATSUOKA DAISUKE, NANMORI TAKASHI

  日本植物細胞分子生物学会 第29回大会, Sep. 2011, Japanese, 九州大学箱崎キャンパス, Domestic conference

  Oral presentation


• Regulatory role of N-terminal region of MEKK1 on its protein kinase activity

  古谷 朋之, MATSUOKA DAISUKE, SASAYAMA DAISUKE, 林 文勇, NANMORI TAKASHI

  21st International Conference on Arabidopsis Research 2010, Jun. 2010, English, パシフィコ横浜, International conference

  Poster presentation


• Involvement of MAP3Kδ4 in growth regulation and stress signaling in Arabidopsis thaliana.

  Daisuke Sasayana, Mariko OKA, Daisuke Matsuoka, Takashi Nanmori

  21st International Conference on Arabidopsis Research 2010, Jun. 2010, English, パシフィコ横浜, International conference

  Poster presentation


• シロイヌナズナMEKK1の活性制御機構と基質特異性について

  古谷 朋之, MATSUOKA DAISUKE, SASAYAMA DAISUKE, 林 文勇, NANMORI TAKASHI

  日本分子生物学会 第32回年会, Dec. 2009, Japanese, パシフィコ横浜, Domestic conference

  Poster presentation


• Arabidopsis thalianaの成長調節およびストレスシグナリングにおけるAtMAP3Kδ4の役割について

  SASAYAMA DAISUKE, MATSUOKA DAISUKE, 岡 麻理子, 住田 洋輔, NANMORI TAKASHI

  日本分子生物学会 第32回年会, Dec. 2009, Japanese, パシフィコ横浜, Domestic conference

  Poster presentation


• シロイヌナズナMAPK AtMPK13の選択的スプライシングとその産物の機能について

  林 文勇, MATSUOKA DAISUKE, SASAYAMA DAISUKE, NANMORI TAKASHI

  日本植物細胞分子生物学会 第27回大会, Jul. 2009, Japanese, 日本大学生物資源科学部湘南キャンパス, Domestic conference

  Oral presentation


• 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

  SASAYAMA DAISUKE, AZUMA TETSUSHI, ITOH KAZUYUKI

  日本作物学会 第226回講演会, Sep. 2008, Japanese, 神戸大学農学部, Domestic conference

  Poster presentation


• 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

  ITOH KAZUYUKI, 松本 晃, SASAYAMA DAISUKE, AZUMA TETSUSHI, 池尻 明彦, 平田 道弥

  日本作物学会 第226回講演会, Sep. 2008, Japanese, 神戸大学農学部, Domestic conference

  Oral presentation


• 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

  SASAYAMA DAISUKE, AZUMA TETSUSHI, ITOH KAZUYUKI

  種生物学会 第39回種生物シンポジウム, Nov. 2007, Japanese, 六甲山YMCA, Domestic conference

  Poster presentation


• Involvement of expansins in internodal elongation of submerged floating rice

  笹山 大輔, Tetsushi Azuma, Kazuyuki Itoh

  9th Conference of the International Society for Plant Anaerobiosis, Nov. 2007, English, Matushima, Sendai, Japan, International conference

  Poster presentation


• 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

  SASAYAMA DAISUKE, AZUMA TETSUSHI, ITOH KAZUYUKI

  日本作物学会 第224回講演会, Sep. 2007, Japanese, 金沢大学角間キャンパス, Domestic conference

  Oral presentation


• 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

  SASAYAMA DAISUKE, AZUMA TETSUSHI, NANMORI TAKASHI, 安田 武司

  日本作物学会 第221回講演会, Mar. 2006, Japanese, 東京大学農学部, Domestic conference

  Oral presentation


• 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

  SASAYAMA DAISUKE, AZUMA TETSUSHI, NANMORI TAKASHI, 安田 武司

  近畿作物・育種研究会 第159回例会, Jul. 2005, Japanese, 神戸大学農学部, Domestic conference

  Oral presentation


• 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

  SASAYAMA DAISUKE, AZUMA TETSUSHI, NANMORI TAKASHI, 安田 武司

  日本作物学会 第216回講演会, Sep. 2003, Japanese, 島根大学生物資源科学部, Domestic conference

  Oral presentation


• 浮稲茎葉部の重力屈性反応について

  武長 裕子, SASAYAMA DAISUKE, AZUMA TETSUSHI, NANMORI TAKASHI, 安田 武司

  日本熱帯農業学会 第94回講演会, Sep. 2003, Japanese, 佐賀大学農学部, Domestic conference

  Oral presentation

• 日本植物生理学会

  2015 - Present


• 日本作物学会

  2003 - Present

• 低酸素が誘導するイネ伸長成長のメカニズムとその制御による新規洪水耐性付与の可能性

  東 哲司, 笹山 大輔, 平野 達也

  日本学術振興会, 科学研究費助成事業, 基盤研究(C), 神戸大学, 01 Apr. 2025 - 31 Mar. 2028


• Adaptive responses to flooding in wild rice species with the CCDD genome

  笹山 大輔

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, Apr. 2022 - Mar. 2026, Principal investigator


• 高温前処理によるイネメソコチル伸長の制御メカニズムの解明と栽培への応用

  東 哲司, 笹山 大輔, 平野 達也

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, Apr. 2021 - Mar. 2025, Coinvestigator

  高温前処理によるメソコチル伸長誘導とジベレリン (GA) の関連について調査を行った。高温前処理によるメソコチル伸長誘導が見られない矮性品種 (短銀坊主) にGAを投与してもメソコチル伸長は見られないが，高温前処理後にGAを投与するとメソコチル伸長誘導がみられたことから，高温前処理によるメソコチル伸長誘導には一定量のGAが不可欠であると推察した。しかし，非矮性品種にGA生合成阻害剤パクロプトラゾールを処理することで，高温前処理しなかった植物体ではメソコチル伸長が有意に抑制されたのに対して，高温前処理を行った植物体ではメソコチル伸長の抑制はわずかであった。GA関連遺伝子の発現解析したところ，SD1，OsGA3ox2，OsGA2ox3 のGA生合成遺伝子は高温前処理により発現が増大し，GA不活性化関連遺伝子の中には高温前処理区で発現量が低下するものがあった。これらの結果より，高温前処理によるメソコチル伸長誘導には一定量のGAが不可欠であるが，GAの関与のみでは説明できず他の因子が関与する可能性が考えられた。 そこでエチレンとジャスモン酸の関与について調べた。エチレン反応阻害剤で処理することにより，高温前処理によるメソコチル伸長誘導効果の減少が見られた。また，ジャスモン酸生合成関連遺伝子の GAOGAO1 の発現は，日本型品種のメソコチルが短い品種で高発現していたが，高温前処理により発現が低下することがわかった。 高温前処理の実用性について調査した。高温前処理した種子を30℃と4℃で保存したところ少なくとも4ヶ月間はメソコチルの伸長誘導効果は持続し，保存温度による違いは見られなかった。高温前処理は畑状態での深播きに有効であることは以前に示したが，湛水直播においても品種によっては有効であることがわかった。


• 耐湿性の強いコムギ品種の特定とその食品利用の適正評価

  笹山大輔

  飯島藤十郎記念食品科学振興財団, 2020年度学術研究助成金, Apr. 2021 - Mar. 2022, Principal investigator


• Responses of wild rice species scarring both submergence-tolelance gene and deepwater rice gene

  Azuma Tetsushi

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, Apr. 2018 - Mar. 2021, Coinvestigator

  Sequence analysis revealed that many of the strains of the wild rice species Oryza rufipogon, O. longistaminata, and O. meridionaris, which belong to the A-genome group of the genus Oryza, have the submergence-resistance gene SUB1A and the floating rice gene SNORKEL1 / 2 (SK1 / 2). The amino acid sequence of SUB1A possessed by these wild species had a homology of 78% or more with the sequence of O. sativa, and the amino acid homology of SK1 / 2 was 77% or more. When the response to flood was investigated using these strains, many strains showed floating ability, but few strains showed flood resistance, and only one strain of O. rufipogon showed both traits.


• Study on internode elongation under submergence in Oryza glumaepatula

  SASAYAMA Daisuke

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), Grant-in-Aid for Young Scientists (B), Kobe University, Apr. 2017 - Mar. 2019, Principal investigator

  In one accession of O. glumaepatula (W1246), it was suggested that the factor causing internode elongation under submergence is induced not mainly by ethylene. For the purpose of further verifying this point, we prepared stem segments which include uppermost internodes from three accessions with SNORKEL gene known to control floating ability in cultivated rice species, Oryza sativa, and internode elongation by submergence or ethylene treatment was evaluated. As a result, ethylene treatment did not induce internode elongation as submergence in any accessions. Therefore, the result suggests that ethylene does not play a central role in internode elongation in O. glumaepatula.


• Adaptive responses of flooding in Amazonian wild rice species

  AZUMA Tetsushi, HIRANO Tatsuya, SASAYAMA Daisuke

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Kobe University, Apr. 2012 - Mar. 2015, Coinvestigator

  When subjected to gradual submergence, adult plants of the Amazonian wild rice species Oryza grandiglumis accessions showed enhanced internodal elongation with rising water level and their growth response closely resembled that of deepwater varieties. On the other hand, when subjected to complete submergence, seedlings of the accessions displayed reduced shoot growth and resumed normal growth after desubmergence, similar to the response of submergence-tolerant varieties of. Neither SUBMERGENCE1A (SUB1A) nor the SNORKEL (SK) genes were detected in the accessions. These results indicate that the O. grandiglumis accessions are capable of adapting successfully to flooding by activating two contrasting mechanisms and that each mechanism of adaptation to flooding is not mediated by SUB1A or the SK genes. 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.


• Factors of regulating internode elongation during sprouting of tubers in Sagittaria trifolia and S. pygmaea

  ITOH Kazuyuki, AZUMA Tetsushi, SASAYAMA Daisuke

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Grant-in-Aid for Challenging Exploratory Research, Kobe University, Apr. 2013 - Mar. 2014, Coinvestigator

  Internode elongation of Sagittaria trifolia plants was induced by submergence irrespective of cover soil or glass beads.On the other hand, submergence-induced internode elongation of S. pygmaea plants was dependent on the presence of cover soil or glass beads. We examined gaseous factors responsible for the enhanced internode elongation in these species, because gas accumulation easily occurs in submerged plant tissues. Treatment of the plant hormone ethylene, which is known to enhance elongation growth in many aquatic plant species, indeed stimulated leaf elongation but failed to promote internode elongation in both Sagittaria species. We found that hypoxia or anoxia generated by submergence serves as an initial growth-promoting factor for internode elongation in S. trifolia, and carbon dioxide accumulated during submergence trigger internode elongation in S. pygmaea.