MicroRNA与药用植物

MicroRNA（miRNA）是一类长度约为19～25个核苷酸的内源性非编码小分子单链RNA，对植物生长发育、次生代谢产物的生物合成以及抗逆性等有重要作用.近年来关于植物中miRNA的研究进展异常迅速，尤其是药用植物，目前已从一些药用植物中鉴定出miRNA，并分析了其在药用植物中的调控作用，这对药用植物的研究具有重要意义.本文综述了miRNA在植物中的产生途径、作用机制，同时重点介绍了miRNA在药用植物中的研究情况，使人们对药用植物中miRNA有更深的认识，为药用植物研究拓展新思路.

MicroRNA in Medical Plants

MicroRNAs（miRNAs）are endogenous single-stranded non-coding small（19~25 nt）RNAs that play important roles in plant development, resistance, and biosynthesis of secondary metabolites. In recent years, studies on the role of miRNA in plants have made significant progresses,especially in medicinal plants．miRNA from some different medicinal plant species have been identified with regulatory effects. This review focused on the synthesis and mechanism of plant miRNAs in hope to provide references for the current research in medicinal plants．