The impact of stress combination on reproductive processes in crops
The impact of stress combination on reproductive processes in crops
复制标题
胁迫组合对作物繁殖过程的影响
DOI：
10.1016/j.plantsci.2021.111007
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发表时间：
2021
期刊：
影响因子：
5.2
通讯作者：
Mittler, Ron
中科院分区：
文献类型：
--
作者：
Sinha, Ranjita;Fritschi, Felix B.;Zandalinas, Sara I.;Mittler, Ron
从历史上看，长期干旱加上热浪造成农作物产量严重减少，估计每年损失数十亿美元。由于全球变暖和气候变化正在推动缺水和热胁迫事件的频率和强度增加，因此了解这些事件如何影响产量对于我们开发气候变化适应性作物的努力至关重要。最近的研究表明，水分亏缺和热胁迫的组合加剧了水分亏缺或热胁迫对不同谷物和豆类生殖过程的影响，直接影响粮食产量。这些研究确定了几种不同的机制，潜在的影响花药，花粉，柱头发育和功能，以及受精胁迫组合。在这里，我们回顾了一些这些研究结果，重点是不平衡的活性氧积累，改变糖浓度，不同激素的相互冲突的功能，有助于减少产量在水分亏缺和热胁迫的组合。未来的研究重点是水分亏缺和热胁迫组合对不同作物繁殖的影响，可能会揭示更多的机制，并揭示开发胁迫组合抗性作物的新方法。这些措施可以减轻这种压力组合对农业的一些潜在破坏性影响。
Historically, extended droughts combined with heat waves caused severe reductions in crop yields estimated at billions of dollars annually. Because global warming and climate change are driving an increase in the frequency and intensity of combined water-deficit and heat stress episodes, understanding how these episodes impact yield is critical for our efforts to develop climate change-resilient crops. Recent studies demonstrated that a combination of water-deficit and heat stress exacerbates the impacts of water-deficit or heat stress on reproductive processes of different cereals and legumes, directly impacting grain production. These studies identified several different mechanisms potentially underlying the effects of stress combination on anthers, pollen, and stigma development and function, as well as fertilization. Here we review some of these findings focusing on unbalanced reactive oxygen accumulation, altered sugar concentrations, and conflicting functions of different hormones, as contributing to the reduction in yield during a combination of water-deficit and heat stress. Future studies focused on the effects of water-deficit and heat stress combination on reproduction of different crops are likely to unravel additional mechanisms, as well as reveal novel ways to develop stress combination-resilient crops. These could mitigate some of the potentially devastating impacts of this stress combination on agriculture.