过氧化氢酶在植物生长发育和胁迫响应中的功能研究进展

Research Advances in the Function of Catalase in Plant Growth, Development and Stress Response

摘要

过氧化氢酶(catalase, CAT)作为过氧化氢(hydrogen peroxide, H2O2)的清除酶在植物生长发育和胁迫响应中扮演着十分重要的角色。CAT的功能受到严格调控, 其在正常条件下维持适当浓度的H2O2作为信号分子以保证植物的生长发育; 在胁迫下保持H2O2稳态以增强植物耐逆性。本文对近年来CAT在植物生长发育和胁迫响应中的功能研究进展予以综述, 特别是翻译后修饰和亚细胞定位对CAT功能的调控, 并对植物CAT的调控机理研究进行了展望。

Abstract

Catalase (CAT) is a hydrogen peroxide (H2O2) scavenging enzyme and plays a central role in plant growth, development and stress response. Its function is strictly regulated to keep an appropriate concentra-tion of H2O2 as a signal molecule under normal conditions to ensure plant growth and development, and to maintain H2O2 homeostasis under stress conditions to enhance plant stress tolerance. This review summarized the recent research progress of CAT in plant growth, development and stress response, especially the regula-tion of CAT function by post-translational modification and subcellular localization. It also made suggestions for future research on the regulatory mechanism of CAT in plants.

关键词

过氧化氢酶(CAT) / 胁迫 / 生长发育 / 调控机制 / 植物

Key words

catalase (CAT) / stress / growth and development / regulatory mechanism / plant