激素调控植物成花机理研究进展
摘要：
开花是植物对环境的适应性表现,是在多种外源和内源信号形成的复杂成花调控网络下完成。植物激素作为最重要的内源信号参与者,在成花进程中扮演着重要角色。近年来,光周期等成花途径和表观遗传调控中激素的作用机理不断被解析。研究发现激素间存在协同和拮抗作用,并证实多种激素参与赤霉素(gibberellins, GA)途径中DELLA蛋白介导的多种成花调控途径。本文主要综述了GA在植物成花中的调控机理,同时探讨了脱落酸(abscisic acid, ABA)、生长素(auxin, IAA)、细胞分裂素(cytokinin, CTK)、水杨酸(salicylic acid, SA)、茉莉酸(jasmonic acid, JA)和乙烯(ethylene, ET)等其他内源激素在成花中的作用及其与DELLA、miRNAs和转录因子(transcription factor, TFs)等通路串联调控,为全面解析激素调控植物成花的网络提供参考。
关键词: 植物激素, 花芽分化, 成花调控, 信号传导
Abstract:
Flowering is the adaptability of plants in response to the environment, which is regulated by the complex flowering control network formed by a variety of exogenous and endogenous signals. Plant hormones, the most important endogenous signal participants, play important roles in the process of plant flowering. Recent reports reveal the pivotal roles of hormones in the epigenetic regulation and flowering promotion pathway. In addition, synergistic or antagonistic interaction has been observed among many hormones. Numerous hormones have been found to be involved in the regulation of the multiple flowering development regulation and signaling pathways mediated by DELLA protein in the gibberellin (GA) pathway. In this review, we summarize the recent advances ofthe flowering mechanisms related to GA pathway and discuss the effects of abscisic acid (ABA), auxin (IAA), cytokinin (CTK), salicylic acid (SA), jasmonic acid (JA), and ethylene (ET) on flowering, including their cross-regulation with DELLA, miRNAs, and transcription factor (TFs). This review provides a reference for further comprehensive analysis of the hormone-regulated network of plant flower formation.
Key words: plant hormone, flower bud differentiation, floral regulation, signal transduction
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