Department of Biological Sciences, National University of Singapore, Singapore, 117543, Singapore.
Temasek Life Sciences Laboratory, National University of Singapore, Singapore, 117604, Singapore.
J Integr Plant Biol. 2020 Jan;62(1):118-131. doi: 10.1111/jipb.12892. Epub 2020 Jan 8.
In angiosperms, floral transition is a key developmental transition from the vegetative to reproductive growth, and requires precise regulation to maximize the reproductive success. A complex regulatory network governs this transition through integrating flowering pathways in response to multiple exogenous and endogenous cues. Phytohormones are essential for proper plant developmental regulation and have been extensively studied for their involvement in the floral transition. Among various phytohormones, gibberellin (GA) plays a major role in affecting flowering in the model plant Arabidopsis thaliana. The GA pathway interact with other flowering genetic pathways and phytohormone signaling pathways through either DELLA proteins or mediating GA homeostasis. In this review, we summarize the recent advances in understanding the mechanisms of DELLA-mediated GA pathway in flowering time control in Arabidopsis, and discuss its possible link with other phytohormone pathways during the floral transition.
在被子植物中，花发育的转变是从营养生长到生殖生长的关键发育转变，需要精确的调控以最大限度地提高生殖成功。一个复杂的调控网络通过整合开花途径来响应多种内外源信号来调控这一转变。植物激素对于植物的正常发育调控是必不可少的，并且已经广泛研究了它们在花发育转变中的作用。在各种植物激素中，赤霉素（GA）在影响拟南芥开花中起着主要作用。GA 途径通过 DELLA 蛋白或调节 GA 稳态与其他开花遗传途径和植物激素信号途径相互作用。在这篇综述中，我们总结了近年来对 DELLA 介导的 GA 途径在拟南芥开花时间调控中的作用机制的理解，并讨论了它在花发育转变过程中与其他植物激素途径的可能联系。
