生长素合成、运输和信号转导调控植物胚胎早期发育

Auxin synthesis, transport and signal transduction regulate early development of plant embryos

生长素是调控植物生长发育最重要的激素之一。被子植物的胚胎发育从双受精开始到种子成熟要经历一系列事件,包括合子激活、细胞分裂与分化、极性建立、模式形成、器官发生、储藏物质积累等重要过程。本文综述了生长素的合成、运输和信号转导在植物早期胚胎发育过程中的作用,主要概括了生长素在胚胎发育早期的动态分布,以及生长素合成、运输和信号转导相关基因的突变对植物胚胎发育的影响。

Auxin is a key phytohormone that regulates plant growth and development.The embryo development of angiosperms,which starts with double fertilization and terminates with seed maturation,undergoes a series of events,including zygotic activation,cell division and differentiation,polarity establishment,pattern formation,organogenesis and accumulation of storage substances.In this paper,we review the role of genes involved in auxin synthesis,transport and signal transduction in early embryo development.We describe the dynamic distribution of auxin during early embryo development,and summarize the effects of mutants with defects in auxin synthesis,transport and signal transduction on embryo development.