The Circadian Clock Influences the Long-Term Water Use Efficiency of Arabidopsis.,Plant Physiology

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The Circadian Clock Influences the Long-Term Water Use Efficiency of Arabidopsis.
Plant Physiology ( IF 6.5 ) Pub Date : 2020-03-16 , DOI: 10.1104/pp.20.00030
Noriane M L Simon ₁ , Calum A Graham _{1,

2} , Nicholas E Comben ₁ , Alistair M Hetherington ₁ , Antony N Dodd ₃

Affiliation

In plants, water use efficiency (WUE) is a complex trait arising from numerous physiological and developmental characteristics. Here, we investigated the involvement of circadian regulation in long-term WUE in Arabidopsis (Arabidopsis thaliana) under light and dark conditions. Circadian rhythms are generated by the circadian oscillator, which provides a cellular measure of the time of day. In plants, the circadian oscillator contributes to the regulation of many aspects of physiology, including stomatal opening, rate of photosynthesis, carbohydrate metabolism, and developmental processes such as the initiation of flowering. We investigated the impact of the misregulation of numerous genes encoding various components of the circadian oscillator on whole plant, long-term WUE. From this analysis, we identified a role for the circadian oscillator in WUE. It appears that the circadian clock contributes to the control of transpiration and biomass accumulation. We also established that the circadian oscillator within guard cells can contribute to long-term WUE. Our experiments indicate that knowledge of circadian regulation will be important for developing crops with improved WUE.

中文翻译：

昼夜节律钟影响拟南芥的长期水分利用效率。

在植物中，水分利用效率（WUE）是由众多生理和发育特征产生的复杂性状。在这里，我们研究了昼夜节律调节在光照和黑暗条件下拟南芥（Arabidopsis thaliana）长期 WUE 的参与情况。昼夜节律由昼夜节律振荡器产生，它提供了一天中时间的细胞测量。在植物中，昼夜节律振荡器有助于调节生理学的许多方面，包括气孔开放、光合作用速率、碳水化合物代谢和发育过程（例如开花的开始）。我们研究了编码昼夜节律振荡器各种成分的众多基因的错误调节对整个植物的长期 WUE 的影响。通过此分析，我们确定了昼夜节律振荡器在 WUE 中的作用。生物钟似乎有助于控制蒸腾作用和生物量积累。我们还确定保卫细胞内的昼夜节律振荡器可以促进长期 WUE。我们的实验表明，昼夜节律调节知识对于开发提高 WUE 的作物非常重要。

更新日期：2020-05-01

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