Root System Formation in Rice Plant : II. Development of lateral roots on the primary roots of tillers

Japanese Journal of Crop Science

Choji KAWASHIMA¹ 

关键词: Growth;    根系;    Rice plant;    水稲;    Root system;    生育;    Tiller;    分げつ;   

DOI  :  10.1626/jcs.57.19

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Following the previous paper on the development of lateral roots of the main stem, similar investigations were conducted on tillers. As in the main stem, lateral roots emerged acropetally along the primary root of the tiller, and their elongation ceased at or slightly after the primary root stopped its elongation. In the tiller VII whose appearance is considered as an average, the final length and the diameter of the laterals, the total number of the secondary roots per primary root, and the maximum density of the secondary roots on the primary root axis, all decreased towards the higher-positioned shoot units. On the contrary, the density of the tertiary roots (i.e., number per cm of the secondary root) increased towards the higher-positioned shoot units. These features were, in general, similarly found in the main stem for shoot units higher than the ninth. Lateral roots development of later-appeared tillers was similar to those found in the higher-positioned shoot units of the tiller VII and the main stem.

【 授权许可】

Unknown