Root System Formation in Rice Plant : IV. Difference among cultivars with different number of leaves on the main stem

Japanese Journal of Crop Science

Choji KAWASHIMA¹ 

关键词: Growth;    根系;    Rice plant;    水稲;    Root system;    生育;    Varietal difference;    品種間差;   

DOI  :  10.1626/jcs.57.37

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Differences in the root system formation among cultivars with different numbers of leaves on the main stem were compared. The roots studied were those from the second and the third highest shoot units with crown roots. The final lengths of the secondary and the tertiary roots of Ishikari [which had the least number of leaves on the main stem (11-12)] were longer than in Toyonishiki [with moderate number of leaves (15-16)] and Reiho [with most leaves (20-21)]. The number of the secondary roots per primary root was the largest in Ishikari, intermediate in Toyonishiki, and the smallest in Reiho. However, there was no clear difference in the density of the secondary roots along the primary roots. The density of the tertiary roots was higher in the upper primary roots of Toyonishiki and Reiho. The differences in the diameter of any kinds of lateral roots among the cultivars were unclear. The total number, total length, total volume and surface area of the lateral roots per primary root, all were the largest in Ishikari, the least in Reiho and intermediate in Toyonishiki. At specific time before heading, a high percentage of root system formation was attained in Reiho, whereas in Ishikari the percentage was low. Toyonishiki gave an intermediate value in this regard. The three cultivars completed their root system formation in the same order.

【 授权许可】

Unknown