高等植物赤霉素代谢及其信号转导通路

Gibberellins Metabolism and Signaling Pathway in Higher Plant

赤霉素是一类重要的植物激素,对植物的生长发育,如种子的萌发、茎的延展、叶片的生长、休眠芽的萌发以及植物的花和种子的发育等生理具有重要的调控作用。从1926年被发现至今,阐明了赤霉素代谢机理及调控机制,明确了赤霉素在植物体内的信号转导途径。本文综述了赤霉素的生物合成途径及其平衡的调节;赤霉素受体GID1、DELLA蛋白在赤霉素信号转导途径中的作用及相关研究;泛素介导的DELLA蛋白降解在赤霉素信号转导中的研究进展。

Gibberellins （GA） plays an essential role in modulating plant growth and development including seed germination, stem elongation, flower development and bud germination. GA was originally identified by a Japanese scientist in rice in 1926, since then a lot of breakthroughs were achieved. Especially in the past decade, exciting progress has been made in GA metabolism and signaling transduction. This review elaborated the GA biosynthesis and homeostasis, highlighted the GA receptor （GID1） and DELLA proteins in signal transduc- tion pathway, and discussed recent advances in the understanding of the SCFtIDe/sLy1 E3 ubiquitin ligase-mediat- ed degradation of DELLA in the GA channel.