microRNA在植物次生代谢调控中的作用

MicroRNAs (miRNAs) are endogenous noncoding RNAs spreadingacross the eukaryotes involved in regulating a wide range of biological processes.Plant secondary metabolism is the consequence of plants adapting themselves to the enviroment and it is one of the main defense mechanism; Plant secondary metabolites have important value use in the pharmaceutical, food, light industry and other fields. According to the function of miRNAs' targets, the patterns of plant miRNAs mediatiatedregulation of plant secondary metabolism by acting on their targets include direct regulaiton and indirect regulation.Plant miRNAs directly regulate secondary metabolite biosynthesis by targeting synthetase or transcription factor and indirectly affect secondary metabolitebiosynthesis byfine-tuning signal transduction through the targets including the enzyme or transcription factorinvolved in the synthesis of signal moleculesorthe components of signal transduction pathways.This review provide new perspective for the research of regulation of plant secondary metabolism.