《植物生理学报》 2014, 50(10): 1435-1444

拟南芥下胚轴伸长与向光性的分子调控机理

姜楠, 王超, 潘建伟*

浙江师范大学化学与生命科学学院, 浙江金华321004

通信作者：潘建伟；E-mail: jwpan@zjnu.cn；Tel: 0579-82287105

摘　要：

下胚轴快速伸长和向光性是高等植物进行固着生活的重要适应性机制, 是子叶钻出土层进行光形态发生和光合作用的必要前提。拟南芥下胚轴因其简单的生理形态结构和特异的生理功能而成为剖析植物细胞伸长和向性生长的理想模式系统。本文主要介绍光和植物激素调控拟南芥下胚轴伸长和向光性弯曲的生理基础、遗传学功能及其分子调控机理的最新进展。

关键词：拟南芥; 下胚轴; 细胞伸长; 向光性; PIFs; 激素

收稿：2014-04-28   修定：2014-08-20

资助：国家自然科学基金(31370313、91317304和31171520)和浙江省科技厅公益性项目(2013C32010)。

Molecular Regulatory Mechanisms of Hypocotyl Elongation and Phototropism in Arabidopsis

JIANG Nan, WANG Chao, PAN Jian-Wei*

College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, China

Corresponding author: PAN Jian-Wei; E-mail: jwpan@zjnu.cn; Tel: 0579-82287105

Abstract:

Rapid elongation and phototropism of the hypocotyl, which are essential for the young seedling to perceive light and undergo photomorphogenesis and photosynthesis, are important adaptive mechanisms for plant sessile life. The Arabidopsis hypocotyl is an ideal model system to dissect cell elongation and tropic growth in plants due to its simple physiological and morphological structure and specific physiological roles. This review focused on physiological basis and genetic functions of light- and phytohormone-regulated hypocotyl elongation and phototropism, and recent progresses on their regulatory molecular mechanisms in Arabidopsis thaliana.

Key words: Arabidopsis thaliana; hypocotyl; cell elongation; phototropism; PIFs; hormones