Effect of Brassinolide on the Cultured Rice Root Growth as Modified by Figaron and Gibberellic Acid

Japanese Journal of Crop Science

Eizo MAEDA¹  Said Hassan RADI¹ 

关键词: Brassinolide;    イネ;    Figaron;    ジベレリン酸;    Gibberellic acid;    植物ホルモンによる制御;    Hormonal regulation;    根の生長;    Oryza sativa L.;    根培地;    Root growth;    胚盤培地;    Root medium;    フィガロン;    Scutellum medium;    ブラシノライド;   

DOI  :  10.1626/jcs.57.191

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The excised rice root was cultured by using two separate media. The root base was supplied with 12.5% of sucrose via scutellum, while the root tip was immersed in the inorganic nutrients of MS medium diluted 4 times. Different concentrations of brassinolide were supplied via either root tip (root medium) or root base via scutellum (scutellum medium). Brassinolide supplied to the scutellum medium stimulated the excised root growth at a concentration of 10-8 M, while application of the same concentration to the root medium was found to be drastically inhibitory. Although the single application of either brassinolide (10-8 M) or figaron (10-8 M) to the scutellum medium detectably stimulated root growth, a mixture of them applied to the scutellum medium was shown to be inhibitory for root growth, especially for primary root length while the lateral root length was stimulated. On the other hand when GA3 was supplied to the scutellum medium the primary root length showed a recovery from the slight inhibition observed when brassinolide was applied alone. Results revealed that dispite the observed superiority of the mixture of brassinolide and GA3 in stimulating root growth and the antagonistic effect in the case of brassinolide and figaron, their regulatory effects seemed to be through a different mode of actions.

【 授权许可】

Unknown