Studies on Growth and Development of Tillers in Wheat : II. Reexamination of the emergence of tillers from the developmental relationships of leaves and roots

Japanese Journal of Crop Science

Jian-min LI¹  Koou YAMAZAKI¹  Jiro HARADA¹ 

关键词: Emergence;    環境条件;    Environmental conditions;    コムギ;    Leaf;    出現;    Root;    æ ¹;    Tiller;    葉;    Wheat.;    分げつ.;   

DOI  :  10.1626/jcs.62.534

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

In this study, the relationships between the emergence of tillers and the plant development, the emergence of leaves and roots were examined. Winter wheat (Triticum aestivum L.) plants, cv. Norin 61 grown under dry (D, notirrigated), wet (W, irrigated) conditions in a vinyl-house and under field (F) conditions were sampled at intervals of 10-14 days from seedling stage to maturity. The emergence and the numbers of leaves, roots, and tillers were observed and their relationships were examined and compared. The results are as follows. (1) Number of tillers per plant increased until the stem elongation stage, and the environmental conditions affected both the period of tillering and the emergence of tillers from the leaf axils at higher positions and orders. (2) Linear relationships were found between the number of leaves and roots on the main stem and the tillers. However, the tillers produced a smaller number of roots per phyllochron than main stems, as did the tillers at higher positions and orders compared to those at lower positions and orders, although the tillers at higher positions and orders produced root earlier. (3) Similar differences were also found in the main stems or primary tillers grown under different conditions. However, there were no differences among the individual plants grown under different conditions, because the differences in main stems and primary tillers were balanced by the differences caused by the number of tillers per plant. This result suggested that the emergence of tillers was connected with the developmental relationships of leaves and roots.

【 授权许可】

Unknown