microRNA在植物逆境胁迫应答中的作用  

The Roles of MicroRNA in Plant Stress Responses

作　　者：张玲瑞[1] 

机构地区：[1]华南师范大学生物光子学研究院激光生命科学研究所,暨激光生命科学教育部重点实验室,广东广州510631

出　　处：《激光生物学报》2010年第4期562-568,共7页Acta Laser Biology Sinica

基　　金：教育部"长江学者与创新团队计划"创新团队项目(IRT0829);国家高技术研究发展计划"863"项目资助(2007AA10Z204)

摘　　要：逆境胁迫严重影响着全世界范围内的作物产量。为减少逆境胁迫损伤,植物在长期的进化过程中形成了多级别(转录、转录后和翻译、翻译后)的基因表达调控应答机制。最近研究发现,内源microRNA(miRNA)在植物逆境胁迫应答中具有重要的调节作用。在逆境胁迫发生时,一些miRNA会表达上调,而另一些miRNA会表达下调;miRNA正是通过下调胁迫应答过程的负调节子靶基因和上调胁迫应答过程中的正调节子靶基因,来执行生理调控功能。通过综述miRNA在植物逆境应答中的作用,以期全面的了解逆境胁迫调控网络。All over the world, crop production is significantly reduced by biotic and abiotic stress factors. To reduce the losses caused by stress factors, plants have evolved multi-level regulator mechanism of gene expression at the transcriptional, post-transcriptional, translational and post-translational levels. Newly discovered endogenous microRNA （miRNA） has been known as important players in plant stress responses. In response to stress factors, some miRNA would be up-regulated, and others down-regulated, miRNA executing its roles by down-regulating their target genes that encode negative regulators of stress responses and causing the accumulation of their target mRNAs that contribute positively to the adaptation to stress. Here, the roles of plant miRNA in biotic and abiotic stress response were reviewed for understanding the regulatory networks involved in stress in depth.

关 键 词：MICRORNA 非生物胁迫 生物胁迫 营养亏缺 胁迫应答 

分 类 号：Q68[生物学—生物物理学]