植物抗逆性与水杨酸介导的信号传导途径的关系

基因表达既受发育过程的调控又受外界环境的影响。无论是内因还是外因诱发一组基因表达时都涉及信号传导(signal transduction)问题。局部器官和组织所发生的生理变化的信息要传递到远处的组织,引起基因表达时间和空间上的协调。信号传导途径的研究是当今分子生物学的研究热点之一。 作为信号传递的分子主要是小分子物质,属于次生代谢产物。也发现某些小肽具有信号分子的功能。信号分子可以在胞间扩散,亦可通过输导组织传送到远处的器官。近年来研究甚多的一种信号

STRESS RESISTANCE OF PLANTS INDUCED VIA THE SALICYLIC ACID-MEDIATED SIGNAL TRANSDUCTION PATHWAY

In recent years there has been growing interests in plant response to environmental stress via the salicylic-acid (SA) -mediated signal transduction pathway. Significant advances have been achieved on SA metabolism in relation to phenylpropanoid pathway and the process involved in the breakdown of H2O2 by catalase, which can be inhibited by SA. Evidence from a large body of literature suggests the role of SA as a signal molecule and provids the biochemical and molecular biological basis for the link between pathogen infection and the induction of systemic acquired resistance.