Function of Brassinolide in the Regulation of Root Development in Rice

Abstract: In brassinosteroids (BRs) compounds， brassinolide (BL) has the highest activity， and other significant characteristics of broad spectrum and non-toxic， improving the plant type and resistance， and so on. Root is the main organ of plants absorbing water and nutrients， therefore we will clarify the genetic， physiological and biochemical mechanisms of BRs on the regulation of root development， for the more effective use of BRs hormone， architecture design and implementation of the directional. In present study， we analyze the influence of brassinolide on root development by foliar spraying method. We analyze of effects of brassinolide on root system development by plant microscopy technique. Then， we detect the influence of brassinolide on the other phytohormones content by high pressure liquid chromatography. We also identify proteins regulated by brassinosteroid by proteomics methods and analyze the physiological mechanism of brassinolide on the regulation of root system development. The results show that brassinosteroids of certain concentration can promote seed root and lateral root. Root cytokinin and gibberellin content increased through regulation of growth-related enzymes to improve plant development. BRs can promote the growth of rice seed root and lateral root and root hair. It may enhance the plant resistant through regulation stress related proteins.

CSTR: 32200.14.cjcb.2016.10.0002