论文部分内容阅读
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) are novel non-coding RNAs of 20-24 nt in length, which are involved in the regulation of various physiological and metabolic activities of plants by regulating the expression of target genes. Heavy metals are a kind of important environmental pollutants, which seriously endanger the growth and development of plants and even cause plant death. Plants in the long-term evolutionary process to form a variety of mechanisms to resist heavy metal stress, such as miRNA regulation of the transcription level of a particular gene plays an important role in stress response. This review summarizes the types and mechanisms of miRNAs involved in heavy metal stress in plants, and provides clues and basis for revealing the mechanism of gene expression under heavy metal stress and improving the tolerance of plants to heavy metals by genetic engineering.