中文摘要：

植物的转座元件对于植物基因组的组成、进化和基因表达都具有重要影响.植物绝大部分的转座元件都处于沉默状态.植物机体通过一套识别转座元件并进行表观遗传沉默的有效机制,可逆地调控着转座元件的激活与沉默.本文综述了转座元件沉默和激活的表观遗传机制.

英文摘要：

Transposable elements make up a substantial proportion of most plant genomes and have significant impact on plant genome composition,evolution and gene expression.Under most circumstances,the vast majority of transposons are inactive.If repression of transposable elements is inactivated,these elements will have a great influence on gene expression and genome stability.Plants have developed an effective mechanism for recognizing and silencing transposons.Epigenetic mechanisms for transposon silencing and activation are discussed.