タンパク質変異米水稲品種の米粒内における種子貯蔵タンパク質の分布

日本作物学会紀事

竹田 博之¹  大平 陽一¹  佐々木 良治¹ 

[1] 近畿中国四国農業研究センター

关键词: Digestible protein;    易消化性タンパク質;    Oryza Sativa L;    水稲;    Seed-protein mutant cultivar;    タンパク質変異米水稲品種;    Protein distribution;    タンパク質分布;    Seed protein;    貯蔵タンパク質;    Low glutelin content;    低グルテリン;    Milling percentage;    搗精歩合;    Rice grain;    米粒;   

DOI  :  10.1626/jcs.78.58

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The distribution of seed storage proteins in rice grain of three seed-protein mutant cultivars with low ratios of digestible protein were compared with that of the normal-type cultivar “Nihonmasari”. In seed-protein mutant cultivars and “Nihonmasari”, 44—45% of the total protein and 44—48% of the digestible protein were present in the 100->80% layers. The content of the digestible protein was highest in the 100->90% layer in seed-protein mutant cultivars, but it was highest in the 90->80% layer in “Nihonmasari”. This tendency was more pronounced in low-glutelin 26-kDa-globulin-deficient cultivar than in low glutelin cultivars. In “Nihonmasari”, the contents of 37-39 kDa glutelin α and 22-23 kDa glutelin β, which are major digestible proteins, were highest in the 90->80% layer. However, in seed-protein mutant cultivars, the contents of 57 kDa excess protein and 57 kDa protein, which occupy a high percentage of digestible protein, were highest in the 100->90% layer. Therefore, it was considered that the varietal difference in the digestible protein distribution was due to the differences in the distribution of each protein fraction. Up to 10% of digestible protein is distributed in the 80->70% layer and inner layers, which indicate that the effective milling percentage to decrease digestible protein content of rice grain is about 80%.

【 授权许可】

Unknown