Toward a Molecular Understanding of Abscisic Acid Actions in Floral Transition.
Toward a Molecular Understanding of Abscisic Acid Actions in Floral Transition.
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DOI：
10.1093/pcp/pcy007
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发表时间：
2018-02
影响因子：
4.9
通讯作者：
K. Shu;Xiaofeng Luo;Y. Meng;Wenyu Yang
中科院分区：
文献类型：
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作者：
K. Shu;Xiaofeng Luo;Y. Meng;Wenyu Yang
从营养生长阶段到开花的过渡是植物繁殖和存活的关键检查点，特别是在环境胁迫条件下。许多因素调节开花时间，包括外源性环境线索，如白天的长度和温度，以及作为盐和干旱胁迫，和内源性植物激素信号级联。赤霉素和阿坝是一种典型的植物激素组合，其拮抗调节多种生物学过程，包括种子休眠和萌发、初生根生长和幼苗发育。赤霉素对开花时间的调控具有积极的作用，是调控花转变的重要途径。然而，在过去的几十年里，大量的研究表明，阿坝对开花过渡的贡献仍然是有争议的，因为积极和消极的影响都有记载。重要的是要确定为什么以及如何阿坝显示这种矛盾的影响开花时间。在这个最新的审查，主要是基于最近的出版物和新出现的数据，我们总结了不同的和对比的作用阿坝的花转变，而这些作用的详细分子机制进行了讨论。最后，在这个主题中的剩余的挑战和开放的问题。
The transition from the vegetative growth phase to flowering is a crucial checkpoint for plant reproduction and survival, especially under environmental stress conditions. Numerous factors regulate flowering time, including exogenous environmental cues such as day length and temperature, as well as salt and drought stresses, and endogenous phytohormone signaling cascades. Gibberellins and ABA are one classic combination of phytohormones which antagonistically regulate several biological processes, including seed dormancy and germination, primary root growth and seedling development. As regards control of flowering time, gibberellin exhibits a positive role, and represents an important pathway in the regulation of floral transition. However, over the past decades, numerous investigations have demonstrated that the contribution of the stress hormone ABA to floral transition is still controversial, as both positive and negative effects have been documented. It is important to determine why and how ABA shows this contradictory effect on flowering time. In this up to date review, primarily based on recent publications and emerging data, we summarize the distinct and contrasting roles of ABA on floral transition, while the detailed molecular mechanisms underlying these roles are discussed. Finally, the remaining challenges and open questions in this topic are presented.