细胞分裂素调控种子发育、休眠与萌发的研究进展

Research Progress in Seed Development,Dormancy and Germination Regulated by Cytokinin

种子萌发是子代植株建立、生长和繁育的重要阶段,在种子植物生命周期中起重要作用。种子休眠是在发育过程中形成的,在生理成熟期达到峰值。种子休眠与萌发的植物激素调控可能是种子植物中一种高度保守的机制。细胞分裂素(CK)是植物体内的一种重要信号分子,调控植物生长发育的许多方面。生物活性CK的水平由其生物合成、活化、失活、再活化和降解之间的平衡所调控,种子的发育、休眠与萌发受生物活性CK的水平和信号转导途径调控。该文综述了CK的生物合成与代谢、信号转导以及对种子发育、休眠与萌发的调控作用,提出了在本领域需要进一步研究的科学问题,旨在为理解CK调控种子发育、休眠与萌发的分子机理提供参考。

Seed germination is an important stage in the establishment,growth and propagation of plants,and plays a critical role in the life cycle of seed plants.Seed dormancy is formed during development,and reaches its peak at physiological maturity.The phytohormone regulation of seed dormancy and germination may be a highly conserved mechanism in seed plants.Cytokinin(CK)is one of the most important signal molecules in plants,and regulates many aspects of plant growth and development.The bioactive CK levels are controlled by a balance among biosynthesis,activation,deactivation,re-activation and degradation,and seed development,dormancy and germination are regulated by bioactive CK levels and signaling pathways.Here,we mainly summarize the research progresses of CK biosynthesis and catabolism,signaling,and regulation on seed development,dormancy and germination.In addition,we also propose some scientific questions that need further addressed in this field to provide some information for understanding the molecular mechanism of seed development,dormancy and germination regulated by CK.