应力刺激在植物细胞防卫反应中的作用  

Role of RGD-mediate Adhesion in Signal Transduction of Plant Resistance

作　　者：赵欢[1] 王伯初[1] 赵虎成[2] 席葆树[2] 戴传云[1] 

机构地区：[1]重庆大学生物工程学院生物力学与组织工程教育部重点实验室,重庆400030 [2]清华大学工程力学系生物力学实验室,北京100084

出　　处：《重庆大学学报（自然科学版）》2006年第3期116-118,共3页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(30270354)

摘　　要：在病原菌与植物初步接触并企图定植期间,有一系列的识别活动,其中包括物理学和生化识别等.二者的相互关系,将直接影响以后的侵染.在病原真菌侵染过程中,不仅对植物细胞有一个酶解的过程,还有一个物理挤压的过程.后者的应力刺激几乎总是能够引起细胞壁相关的防卫反应,诸如细胞外超氧化物的产生和胼胝质的沉积等.化学信号和力学信号诱导的有机结合才能引发完整的细胞防卫反应.和哺乳动物细胞相似,植物细胞对于力学信号的感知和传导依赖于细胞壁和细胞膜之间的粘附,该粘附是由包含RGD(Arg-G ly-Asp)序列多肽特异介导的,并且该粘附为植物细胞壁相关防卫基因表达所必需.During the period of the primary contact time, there are series of recognition between the Fungal and the plant cell ,which include physical and biochemical process of penetrating plant cell walls, there is not only an e pathogens recognition. The results affect the infection directly. In the mzymolysis to plant cell wall, but also a mechanical squeeze to the cell wall. The latter almost trigger cell-associated defense response, such as extracellular hy ation and caUose doposition The complete cell wall-related defence response will be induced by mechanical signal and chemical signal together. Being to with the mammalian cell, in plant cell wall intergrin-like proteins have response to perceive the mechanical signal, which is via RGD （Arg-Gly-Asp） motif, and the plasma membrane-cell wall adhesion is required for expression of plant defense responses during fungal penetration.

关 键 词：应力刺激 病原真菌 防卫反应 类整合素 力学信号传导 

分 类 号：Q947.8[生物学—植物学]