Japanese Journal of Crop Science | |
Development of Endosperm and Synthesis of Starch in Rice Grain : I. Development of endosperm and distribution of 14C-labeled assimilates | |
Kiyoshi KOGURE1  Guang-Cen HE1  Hiroshi SUZUKI1  | |
关键词: Cell walls; 細胞å£; Lipids; 脂質; Low molecular materials; 水溶性多糖; Proteins; タンパク質; Radioactivity; 低分å物質; Rice grain; デンプン; Starch; 米粒; Water soluble polysaccharides; 放射活性; | |
DOI : 10.1626/jcs.58.246 | |
学科分类:农业科学(综合) | |
来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan | |
【 摘 要 】
Rice plant (Japonica c.v. Koshihikari) was exposed to 14CO2 during the ripening period. The autoradiography of brown rice grains showed that the 14C-labeled assimilates distributed throughout the whole grains fed till the 5th day after heading, then the reserve material accumulated first in the inner portion and late in turn to the outer layer. Total radioactivity rose from the 5th day before heading till the 18th day after heading, then dropped as the grains ripened. Most of the radioactivity was incorporated into starch with the maximum on the 18th day after heading. The incorporation of 14C into proteins, lipids and cell walls was more active in the early ripening stage for building the skeleton of endosperm cells and for preparation of starch synthesis. Radioactivity in the low molecular materials increased with ripening, because synthesis of the assimilates into starch slowed down.
【 授权许可】
Unknown
【 预 览 】
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RO201912010129968ZK.pdf | 844KB | download |