《植物生理学报》 2015, 51(5): 633-641

植物钙调素结合转录因子CAMTA/SR功能的研究进展

曾后清¹, 王国平¹, 王慧中¹, 林金星^2,3, 杜立群^1,*

¹杭州师范大学生命与环境科学学院, 杭州310036; ²中国科学院植物研究所, 北京100093; ³北京林业大学生物科学与技术学院, 北京100083

通信作者：杜立群；E-mail: liqundu@hznu.edu.cn；Tel: 0571-28865199

摘　要：

在钙信号转导途径中, 钙调素(CaM)作为一种主要的钙感受器, 通过与下游靶蛋白结合调节植物一系列的生理活动。信号响应蛋白(SR)是一类广泛存在于多细胞真核生物中结构保守的钙调素结合型转录因子(CAMTA)。近年来, 人们在植物CAMTA/SR功能的研究上取得了重要的进展。CAMTA/SR在植物的生长发育、防卫反应、通用胁迫反应、抗冻性、抗旱性和激素信号途径等方面发挥了重要的调控作用。本文总结了植物CAMTA/SR的结构特征及生物学功能, 并展望了其研究前景。

关键词：CAMTA/SR; 钙信号; 钙调素; 转录因子; 逆境胁迫; 防卫反应

收稿：2015-01-23   修定：2015-04-27

资助：国家自然科学基金(U1130304和31201679)和浙江省自然科学基金(LY15C020006)。

Functions of Calmodulin-Binding Transcription Activators (CAMTAs) in Plants

ZENG Hou-Qing¹, WANG Guo-Ping¹, WANG Hui-Zhong¹, LIN Jin-Xing^2,3, DU Li-Qun^1,*

¹College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; ²Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; ³College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China

Corresponding author: DU Li-Qun; E-mail: liqundu@hznu.edu.cn; Tel: 0571-28865199

Abstract:

As a primary calcium sensor in all eukaryotes, calmodulin (CaM) regulates a wide range of cellular processes by binding to its effector proteins in plants. Among the target proteins of CaM, signal responsive proteins, also named as calmodulin-binding transcription activators (CAMTAs/SRs) comprise a conserved family of transcription factors in all the multicellular eukaryotes examined so far. In recent years, major progresses have been made in the functional analyses of CAMTAs in plants. In this review, we summarize the domain structures of CAMTAs and the functional significance of CAMTAs in defenses against pathogen and herbivore attacks, in regulation of general stress responses, in tolerance to abiotic stresses such as low temperature and drought, and in growth and development of plants. Perspective on future research is also suggested based on our understanding in this topic.

Key words: CAMTA/SR; Ca²⁺ signal; calmodulin; transcription factor; environmental stress; defense response