DAM基因在植物芽休眠调控中的研究进展

Research advances in DAM gene in plant bud dormancy regulation

芽休眠是植物抵抗不良生长环境的一种重要适应策略,在多年生植物生长发育过程中有重要作用,解析植物芽休眠的机理有助于了解其形成、维持和解除机制,对探明植物的逆境适应机制、扩大植物的种植范围和保障植物的安全生产有重要意义。DAM(DORMANCY-ASSOCIATED MADS-BOX)是在桃无休眠突变株中鉴定的直接参与休眠调控的重要转录因子,归属MIKCC型MADS-box家族,与SVP(SHORT VEGETATIVE PHASE)和AGL24(AGAMOUS-LIKE 24)高度同源。随着研究的深入,DAM基因在多种植物生长发育,特别是休眠调控中的作用被不断揭示。本文结合国内外最新研究进展从DAM基因的结构、表达调控、功能鉴定和表观遗传修饰等方面对植物芽休眠分子调控机理进行了综述,为进一步探明DAM基因在植物芽休眠调控中的作用提供参考。

Bud dormancy is a crucial adaptive strategy for avoiding injury in unsuitable growing environment,playing important roles in growth and development processes of perennial plants.Mechanism analysis of bud dormancy is helpful for understanding the status transitions in dormancy formation,maintenance and release of overwintering buds,which is also of great significance to illuminate the adaptation mechanism,enlarge the planting area and guarantee the safety production of plants.DAM (DORMANCY-ASSOCIATED MADSBOX),initially identified as an important transcription factor in evergrowing peach mutant,is grouped into MIKCC type MADS-box family and highly homologous to SVP (SHORT VEGETATIVE PHASE) and AGL24 (AGAMOUS-LIKE 24).With in-deep study,the role of DAM gene in plant development,especially in dormancy regulation,has been revealed constantly.This paper summarizes recent advances in dormancy regulation of DAM gene in plants,including gene structure,expression patterns,functional identification and epigenetic modification,to provide useful information for further deciphering the role of DAM gene in plant bud dormancy regulation.