非生物及生物胁迫下脱水蛋白的研究进展  

Progress in Research of Dehydrins Response to Abiotic and Biotic Stresses

作　　者：代瑾然[1] 叶辉[2] 陈穗云[1] 

机构地区：[1]云南大学生命科学学院植物科学研究所,昆明650091 [2]云南大学农学院,昆明650091

出　　处：《生物技术通报》2013年第11期19-25,共7页Biotechnology Bulletin

基　　金：云南省烟草公司项目(2012YN36)

摘　　要：植物脱水蛋白(Dehydrins,DHNs)是高度亲水的无序蛋白,属于第2组胚胎发育晚期富集蛋白,在植物响应和适应水分胁迫过程中发挥基础功能。脱水蛋白通常在种子成熟过程中大量富集。此外,受盐、水分、低温胁迫的营养器官也表达脱水蛋白。根据脱水蛋白含有的不同保守结构的类型和数目将其分为五大类,其中由15个氨基酸残基组成的K片段最为保守。自20个世纪80年代报道第一个脱水蛋白至今,它们在非生物胁迫过程中发挥的重要功能得到广泛研究,但是它们确切的生理功能仍不清楚。近年来的研究表明脱水蛋白可能还参与了生物胁迫,在JA信号通路中发挥重要功能。概述近年来在脱水蛋白的结构、理化性质和功能的研究进展。Plant dehydrins, or group 2 late embryogenesis abundant proteins, are highly hydrophilic disordered protein. They play a fundamental role in plant response and adaptation to water stress. Dehydrins typically accumulate in maturing seeds or vegetative tissues under salinity, dehydration and cold stresses. Based on the conserved motifs, dehydrins are classified into five sub-classes. The K segment, which represents a highly conserved 15 amino acid motif, can be found in all dehydrins. Since the first dehydrins were discovered in 1980s, the important roles of dehydrins during cellular dehydration causing by abiotic stresses were widely discussed, but their precise function remains unclear. Recently, it has been reported that in addition to the contribution in water stress, dehydrins have a pleiotropic effect on biotic stress response. They may interfere with JA signal pathway, therefore dehydrins may relate to defense response. This review outline the current stnlctural, physico-chemical and functional characterization of plant dehydrins.

关 键 词：脱水蛋白 无序蛋白 非生物胁迫 生物胁迫 

分 类 号：Q51[生物学—生物化学]