植物DNA甲基化的表观遗传作用研究进展

Advances on Epigenetic Functions of Plant DNA Methylation

摘要:

表观遗传是指DNA序列不发生改变,而基因表达却发生可遗传的改变.表观遗传的现象很多,如DNA甲基化、基因组印记、基因沉默、核仁显性和休眠转座子激活等.DNA甲基化是表观遗传学最重要的研究内容之一,是调节基因功能的重要手段.笔者对植物甲基化的特征和表观遗传作用研究进行简单的叙述.

Abstract:

Epigenetic phenomena,heritable changes in phenotype,and hence in gene regulation,but not in DNA sequence,occur in the process of polyploidization in many plants.These phenomena include gene silencing,DNA methylation,nucleolar dominance,transposable elements activation and genomic imprinting.DNA methylation was considered as one of the common forms of DNA modification in plant cell genomes,and was a key regulator of plant development.In this review,the authors simply introduced the characteristics and role s...