植物热激反应的信号转导机理  

Signal Transduction Mechanism of Plant Heat Shock Response

作　　者：李冰[1] 刘宏涛[1] 孙大业[1] 周人纲[2] 

机构地区：[1]河北师范大学生命科学学院,石家庄050016 [2]河北省农林科学院农业物理生理生化研究所,石家庄050051

出　　处：《植物生理与分子生物学学报》2002年第1期1-10,共10页Journal Of Plant Physiology and Molecular Biology

基　　金：国家自然科学基金 (No .39770 0 75 );国家重点基础研究专项经费(G19990 1170 0 );河北省自然科学基金 ( 30 14 4 7)资助项目

摘　　要：热刺激能诱导机体产生热激响应 (heatshockre sponse ,HSR)。在热激基因 (编码热激蛋白的基因 ,heatshockgene ,HSgene)表达之前许多信号转导组分已经发生了改变。已有一些直接或间接的证据表明Ca2 + 及CaM参与了植物HSR的信号转导。真核生物中热激基因的表达被热激转录因子 (heatshocktranscriptionfactor,HSF)所介导。热胁迫时 ,HSF被激活并结合到热激元件 (heatshockelement,HSE)上。在这篇综述中 ,主要介绍与植物热激信号转导途径 (包括基因调控过程 )中上游的Ca2 + CaM信号系统及下游的热激基因表达调控相关的一些研究进展 。Organisms respond to elevated temperatures by rapidly activating the expression of heat-shock genes. Heat shock causes rapid increase in some members of signal transduction pathway in cell.There has been some direct or indirect evidence indicating involvement of calcium and calmodulin in the regulation of heat shock respones. The activation of heat-shock gene transcription in eukaryotes during the stress response is mediated by the conserved heat shock transcription factor(HSF)which binds to the heat shock element(HSE) in the promoters of heat-shock genes. In this review, we briefly discuss the progress in studies on Ca 2+-CaM signal system of upstream and expression of heat-shock gene of downstream in heat shock signal transduction pathways, include author's work that keep upstream and downstream of signal transduction pathways into a whole chain.

关 键 词：热激反应 信号转导 CAM 基因表达 HSE HSF 植物 

分 类 号：Q942[生物学—植物学]