The nodulation and nyctinastic leaf movement is orchestrated by clock gene LHY inMedicago truncatula
The nodulation and nyctinastic leaf movement is orchestrated by clock gene LHY inMedicago truncatula
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蒺藜苜蓿的结瘤和夜间叶运动是由时钟基因 LHY 精心策划的。
DOI：
10.1111/jipb.12999
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发表时间：
2020-09-07
影响因子：
11.4
通讯作者：
Zhou, Chuanen
中科院分区：
文献类型：
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作者：
Kong, Yiming;Han, Lu;Zhou, Chuanen
植物作为一种无根生物，能够感知、响应和适应环境的变化，从而获得最佳的生长和生存。生物钟通过协调多种生物事件，促进植物的生长和适应性。在豆科植物中，固氮根瘤是微共生体与寄主之间进行氮共生转移的专门器官。在这里，我们报道了豆科植物Medicago truncatula根瘤的内源性昼夜节律是由MtLHY调节的。MtLHY功能的丧失导致形成的结节数量减少，从而导致吸收氮的能力下降。根瘤产生的氮的有效性进一步影响了茎部24小时节律的运行，导致叶片动态运动失调和生物量减少。这些数据揭示了MtLHY在根瘤和芽的昼夜节律振荡器协调中的作用，它提供了根瘤、氮同化和时钟功能之间的机制联系。
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.