Effect of High Water-Temperature on the Morphology of Crown Roots and Leaf in Rice Plants

Japanese Journal of Crop Science

Osamu SASAKI¹ 

关键词: Crown root;    冠根;    Developmental stage;    形態;    High water-temperature;    高水温;    Leaf blade;    水稲;    Leaf sheath;    発育段階;    Morphology;    葉鞘;    Rice plant;    葉身;   

DOI  :  10.1626/jcs.61.388

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

This study was undertaken to clarify the variation of the leaf sizes as well as the number and diameters of the crown roots in rice plant, that had been subjected to high water-temperature (35°C) at the different developmental stages of the leaf and crown roots primordia. Control plants were kept continuously at 30°C water-temperature. High water-temperature decreased both the length and the width of leaf blade. In this case, high water-temperature at the stage of emergence of a given leaf decreased exceedingly blade length of the adjacent younger leaf and blade width of the further adjacent younger leaf. High water-temperature did not show any significant variation in the sheath length. High water-temperature at each stage before the emergence of the crown root decreased the total number of crown roots that emerged, except at the stage of initiation of crown root primordia-which increased in their number. At the stage before the initiation of the crown root primordia, high water-temperature decreased the diameter of both the upper and lower roots that emerged. At the stage from the initiation to the emergence of the crown root primordia, high water-temperature decreased the diameter of the lower root, but increased the diameter of the upper root.

【 授权许可】

Unknown