Molecular basis of Remobilization of cell wall components In culm

秆细胞壁成分再动员的分子基础

• 批准号: 08456008
• 负责人: AKITA Shigemi
• 金额: $ 5.06万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08456008/
• 关键词: rice; lodging; culm; hemicellulose; cell; wall; イネ; 倒伏; 細胞壁

The physiological and molecular base of decreased culm physical strength in ripening stage of rice was studied. Following results were obtained during three years research ;1. Cell wall thickness of the parenchyma was sharply decreased when the strength of culm was reduced.2. Clear difference among varieties were observed in this relation and the variety showing higher remorbilization of non-structural substances during ripening tended to show remarkable reduction in culm strength.3. Hemicellulose and pectin showed the drastic change of their content and the former was responsible for this remorbilization4. (1-3, 1-4) -beta-glucan and arabinoxylan showed sharp decrease during ripening period of rice.5. Gene expression of glucanase was examined and its expression was enhanced in correspondence with the reduced culm strength.Further studies on the molecular basis of varietal differences and the change with growth stage are required.

研究了水稻成熟期茎秆物理强度下降的生理和分子基础。经过三年的研究，取得了以下成果：1。薄壁组织细胞壁厚度随茎秆强度的降低而急剧减小.不同品种间的这种关系存在明显差异，成熟过程中非结构物质降解程度高的品种，其秆力往往会显著下降.半纤维素和果胶的含量变化较大，半纤维素是导致这种变化的主要原因。(1-3，1-4）-β-葡聚糖和阿拉伯木聚糖在水稻成熟期急剧下降.对葡聚糖酶基因的表达进行了检测，发现其表达量随着秆力的降低而增加，但品种间差异的分子基础及其随生育期的变化还有待进一步研究。

项目成果

石田嘉郎・藤本寛・馬場慶貴・秋田重誠: "水稲稈におけるグルカナーゼ遺伝子発現の登熟に伴う変化" 日作紀. (印刷中). (1999)

Yoshio Ishida、Hiroshi Fujimoto、Yoshiki Baba 和 Shigemasa Akita：“水稻成熟过程中葡聚糖酶基因表达的变化”Nissakuki（出版中）。

Nemoto, K.et al.: "Dynamics of cell wall components In rice culms and Its relation to the culm strength." Jpn.J.Crop Sci. 66 Extra issue. 1. 176-177 (1997)

Nemoto, K.等人：“稻秆中细胞壁成分的动态及其与秆强度的关系。”

Nemoto, K.et al.: "Gene expression of (1-3,1-4) -beta-glucanase in ripening stage of rice." Jpn.J.Crop Sci. 68 Extra issue. 1 (In press). (1999)

Nemoto, K.等人：“水稻成熟阶段 (1-3,1-4)-β-葡聚糖酶的基因表达。”

根本圭介・安藤悟志・谷本英一・藤本寛・石田嘉郎・秋田重誠: "水稲桿の細胞壁構成成分の変動と稈強度の関係" 日作紀. 66(別1). 176-177 (1997)

Keisuke Nemoto、Satoshi Ando、Eiichi Tanimoto、Hiroshi Fujimoto、Yoshio Ishida 和 Shigemasa Akita：“水稻茎细胞壁成分变化与秆强度之间的关系”Nissakuki 66（第 1 部分）。 ) )

秋田重誠: "イネの多収研究とフィールドサイエンス" 肥料. 79. 50-70 (1998)

秋田重政：《水稻高产研究与田间科学》肥料。79. 50-70 (1998)