miRNA在植物重金属胁迫应答中的作用  

Role of miRNA in Plant Heavy Metal Stress Response

作　　者：张林[1] 丁艳菲[1] 王熠[1] 朱诚[1] 

机构地区：[1]中国计量学院生命科学学院,杭州310018

出　　处：《植物生理学报》2014年第5期599-604,共6页Plant Physiology Journal

基　　金：浙江省自然科学基金项目(LY13C020002);浙江省大学生科技创新项目;国家自然科学基金项目(31170251);浙江省重点科技创新团队项目(2010R50028)

摘　　要：microRNA （miRNA）是一种新型的长度为20~24 nt的非编码RNA,通过对靶基因的表达调节进而参与调控植物体的多种生理代谢活动。重金属是一类重要的环境污染物,严重危害植物的生长发育,甚至导致植物死亡。植物在长期的进化过程中形成了抵御重金属胁迫的多种机制,如miRNA对特定基因转录后水平的调控就在逆境胁迫应答中发挥重要作用。本文综述了植物中参与重金属胁迫应答miRNA的种类及作用机制,为揭示重金属胁迫条件下基因表达调控机制,以及利用基因工程手段改良植物对重金属的耐受性提供了线索和依据。microRNAs （miRNAs）, a newly discovered class of 20-24 nt non-protein-coding small RNAs, have been reported to involve a broad range of metabolic and physiological processes in plants through the regula-tion of target gene expression. Heavy metals are an important class of environmental contaminants, seriously threatening the growth and development of plants and even causing plant death. In the long time of evolution-ary process, plants have formed various mechanisms of heavy metal stress resistance, in which the miRNA-guided post-transcriptional gene regulation plays an important role in environmental stress response. This arti-cle reviews recent progress in research on the miRNAs involved in heavy metal stress response and the regulatory mechanisms, which will help to reveal gene regulation mechanisms under heavy metal stress as well as provide evidence for the genetic improvement in plant heavy metal tolerance.

关 键 词：重金属胁迫 调节机制 植物 

分 类 号：X173[环境科学与工程—环境科学] Q945.78[生物学—植物学]