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The nodulation and nyctinastic leaf movement is orchestrated by clock gene LHY in Medicago truncatula
Journal of Integrative Plant Biology ( IF 9.3 ) Pub Date : 2020-07-30 , DOI: 10.1111/jipb.12999 Yiming Kong 1 , Lu Han 1 , Xiu Liu 1 , Hongfeng Wang 1, 2 , Lizhu Wen 1 , Xiaolin Yu 1 , Xiaodong Xu 3 , Fanjiang Kong 2 , Chunxiang Fu 4 , Kirankumar S. Mysore 5 , Jiangqi Wen 5 , Chuanen Zhou 1
Journal of Integrative Plant Biology ( IF 9.3 ) Pub Date : 2020-07-30 , DOI: 10.1111/jipb.12999 Yiming Kong 1 , Lu Han 1 , Xiu Liu 1 , Hongfeng Wang 1, 2 , Lizhu Wen 1 , Xiaolin Yu 1 , Xiaodong Xu 3 , Fanjiang Kong 2 , Chunxiang Fu 4 , Kirankumar S. Mysore 5 , Jiangqi Wen 5 , Chuanen Zhou 1
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As sessile organisms, plants perceive, respond, and adapt to the environmental changes for optimal growth and survival. The plant growth and fitness are enhanced by circadian clocks through coordination of numerous biological events. In legume species, nitrogen‐fixing root nodules were developed as the plant organs specialized for symbiotic transfer of nitrogen between microsymbiont and host. Here, we report that the endogenous circadian rhythm in nodules is regulated by MtLHY in legume species Medicago truncatula. Loss of function of MtLHY leads to a reduction in the number of nodules formed, resulting in a diminished ability to assimilate nitrogen. The operation of the 24‐h rhythm in shoot is further influenced by the availability of nitrogen produced by the nodules, leading to the irregulated nyctinastic leaf movement and reduced biomass in mtlhy mutants. These data shed new light on the roles of MtLHY in the orchestration of circadian oscillator in nodules and shoots, which provides a mechanistic link between nodulation, nitrogen assimilation, and clock function.
中文翻译：
苜蓿时钟基因LHY调控结瘤和夜生叶片运动。
作为固着生物，植物可以感知，响应并适应环境变化，以实现最佳生长和生存。通过生物钟的协调，昼夜节律提高了植物的生长和适应性。在豆类物种中，固氮根瘤已发展成为专门用于微共生体与寄主之间氮共生转移的植物器官。在这里，我们报告说，豆科植物紫花苜蓿中的结节内源性昼夜节律受MtLHY调控。MtLHY的功能丧失导致形成的结节数量减少，导致吸收氮的能力下降。根瘤中产生的氮的可用性进一步影响芽中24小时节律的运转，从而导致夜生叶片运动失调，mtlhy突变体中生物量减少。这些数据揭示了MtLHY在根瘤和枝条中生物钟振荡器的编排中的作用，这提供了根瘤，氮同化和时钟功能之间的机械联系。
更新日期：2020-07-30
中文翻译：
苜蓿时钟基因LHY调控结瘤和夜生叶片运动。
作为固着生物，植物可以感知，响应并适应环境变化，以实现最佳生长和生存。通过生物钟的协调，昼夜节律提高了植物的生长和适应性。在豆类物种中，固氮根瘤已发展成为专门用于微共生体与寄主之间氮共生转移的植物器官。在这里，我们报告说，豆科植物紫花苜蓿中的结节内源性昼夜节律受MtLHY调控。MtLHY的功能丧失导致形成的结节数量减少，导致吸收氮的能力下降。根瘤中产生的氮的可用性进一步影响芽中24小时节律的运转，从而导致夜生叶片运动失调，mtlhy突变体中生物量减少。这些数据揭示了MtLHY在根瘤和枝条中生物钟振荡器的编排中的作用，这提供了根瘤，氮同化和时钟功能之间的机械联系。
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