Sasidharan Rashmi, Voesenek Laurentius A C J
Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584-CH Utrecht, The Netherlands
Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584-CH Utrecht, The Netherlands.
Plant Physiol. 2015 Sep;169(1):3-12. doi: 10.1104/pp.15.00387. Epub 2015 Apr 20.
Flooding is detrimental for plants, primarily because of restricted gas exchange underwater, which leads to an energy and carbohydrate deficit. Impeded gas exchange also causes rapid accumulation of the volatile ethylene in all flooded plant cells. Although several internal changes in the plant can signal the flooded status, it is the pervasive and rapid accumulation of ethylene that makes it an early and reliable flooding signal. Not surprisingly, it is a major regulator of several flood-adaptive plant traits. Here, we discuss these major ethylene-mediated traits, their functional relevance, and the recent progress in identifying the molecular and signaling events underlying these traits downstream of ethylene. We also speculate on the role of ethylene in postsubmergence recovery and identify several questions for future investigations.
淹水对植物有害，主要是因为水下气体交换受限，这会导致能量和碳水化合物短缺。气体交换受阻还会导致所有淹水植物细胞中挥发性乙烯迅速积累。尽管植物内部的一些变化可以表明淹水状态，但乙烯的普遍而快速积累使其成为早期且可靠的淹水信号。毫不奇怪，它是几种适应淹水的植物性状的主要调节因子。在这里，我们讨论这些主要的乙烯介导性状、它们的功能相关性，以及在确定乙烯下游这些性状背后的分子和信号事件方面的最新进展。我们还推测了乙烯在淹水后恢复中的作用，并提出了几个未来研究的问题。
