水稲幼植物の生育におけるエチレンとジベレリンの相乗作用の解析と直播栽培への応用

乙烯与赤霉素对水稻幼苗生长的协同效应分析及其在直播栽培中的应用

• 批准号: 18780010
• 负责人: 渡邊 肇
• 金额: $ 2.3万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18780010/
• 关键词: 水稲; 直播栽培; エチレン; ジベレリン; 幼植物; 出芽

本年度では,エテホン(ET)とジベレリン(GA)が,イネ幼植物の各器官の伸長に及ぼす影響を圃場試験で検討した.その結果,中茎は対照区に比べ各ホルモン処理で有意に伸長し,中でもETとGAの併用区で最も長かった.鞘葉から第2葉までの伸長は,ETおよびGA単独区では,対照区と有意差がみられなかったが,ETとGAの併用区では,対照区,ETおよびGA単独区に比べて,有意に伸長が促進された.草丈も,ETとGAの併用区は,他の処理区に比べ有意に長かった.この圃場試験の結果は,室内試験の結果とほぼ一致した.さらに,茎葉の充実度は,各処理区で有意差は見られなかった.さらに,ETとGAの併用区では,出芽開始と出芽揃いが早く,しかも第1葉の伸長が他の処理区に比べて早く認められた.これらは,幼植物器官の伸長が速やかに進行することが必要とされる直播栽培では有利であると考えられる.さらに,ETとGAの相乗作用の機構を各種の遺伝子発現の点から検討した.その結果,細胞伸長に深く関与するエクスパンシン遺伝子(Exp)は,対照区に比べ,GAとETの単独区および併用区で発現量が増大した.しかし,GAとETの単独区と併用区では,発現量に顕著な差は認められなかった.Expは,多重ファミリーを形成することから,供試した以外のExpについて検討する必要がある.しかし,水稲の病害抵抗性誘導遺伝子の発現は,ETとGAの併用区で最も高かったことから,本処理は,直播栽培における病害抵抗性の付与に有効であると考えられた.以上より,本年度の圃場試験においてETとGAの併用処理は,両者の単独処理に比べ,幼植物器官の伸長を顕著に促進した.今後,イネ幼植物の伸長促進作用におけるETとGAの相乗作用のメカニズムを詳細に検討すると共に,本処理の圃場条件下における幼植物期以降の水稲生育に対する影響を検討する必要がある.

This year, the effects of growth and development of organs on young plants were investigated in the field. As a result, the length of the combined area of ET and GA was the longest. The elongation of the second leaf of the sheath leaves is opposite to that of the third leaf of the sheath leaves. The elongation of the second leaf of the sheath leaves is opposite to that of the third leaf of the sheath leaves. The grass,ET and GA are used together, and their treatment areas are intentionally longer than those of the grass. The results of field and indoor tests are consistent. In addition, the stem and leaf are full, and the treatment areas are intentionally different. In addition,ET and GA are used in the treatment area, and the budding starts early, and the elongation of the first leaf is earlier than that of the other treatment area. The elongation of young plant organs is necessary and beneficial to direct seeding cultivation. In this paper, the mechanism of interaction between ET and GA is discussed. As a result, the expression of Exp in cell elongation increased in comparison with that in the control region, and the expression of Exp in GA and ET increased in the single and combined regions. In addition to the test, the test results show that the test results are consistent with the test results and the test results are consistent with the test results. The highest occurrence of disease resistance inducers in the hybrid zone of ET and GA was observed in this treatment, and the highest occurrence of disease resistance inducers in direct seeding culture was observed. As mentioned above, the combination of ET and GA in this year's nursery trial promoted the elongation of young plant organs compared with the single treatment. In the future, the effect of ET and GA on the elongation of young plants should be discussed in detail. It is necessary to investigate the effect of ET and GA on the growth of young plants under the nursery conditions of this treatment.

项目成果

Cloning of a cytochrome P450 gene induced by ethylene treatment in deepwater rice (Oryza sativa L.)

深水稻 (Oryza sativa L.) 乙烯处理诱导的细胞色素 P450 基因的克隆

• 发表时间: 2008
• 期刊: Plant Production Science 11巻
• 作者: Watanabe;H.;H. Kende;T. Hayakawa and M;Saigusa
• 通讯作者: Saigusa

Improvement of rice growth in direct seeding cultivation by application of gibberellin in combination with ethylene-releasing agent ethephon

赤霉素与乙烯释放剂乙烯利配伍改良直播水稻生长

• 发表时间: 2006
• 期刊: Frontiers in Rice Science-from gene to field-. Abstracts
• 作者: Hajime Watanabe;Masahiko Saigusa
• 通讯作者: Masahiko Saigusa

SYNERGISTIC ACTIONS OF ETHYLENE WITH GIBBERELLIN IN THE GROWTH OF RICE

乙烯与赤霉素在水稻生长中的协同作用

• 发表时间: 2006
• 期刊: Book of abstract : 7^<th> International symposium on the plant hormone ethylene
• 作者: Hajime Watanabe;Masahiko Saigusa
• 通讯作者: Masahiko Saigusa