A mobile ELF4 delivers circadian temperature information from shoots to roots
A mobile ELF4 delivers circadian temperature information from shoots to roots
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DOI：
10.1101/612671
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
Wei Wei Chen-Wei;Nozomu Takahashi;Yoshito Hirata;Dmitri A. Nusinow;Steve A. Kay;Paloma Mas
中科院分区：
文献类型：
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作者：
Wei Wei Chen-Wei;Nozomu Takahashi;Yoshito Hirata;Dmitri A. Nusinow;Steve A. Kay;Paloma Mas
生物钟与环境信号同步，主要是光和温度。阐明植物生物钟对温度波动的反应对于了解植物对环境的响应至关重要。在这里，我们发现了根钟中普遍存在的拟南芥时钟成分ELF4(早花4)的温度依赖功能。微嫁接分析和数学分析表明，ELF4从茎中移动来调节根的节律。ELF4运动不传递光周期信息，但运输对于以依赖于温度的方式控制根钟的周期是必不可少的。在低温下，ELF4的移动性更受青睐，导致根时钟节奏较慢，而高温会降低移动性，导致时钟较快。因此，移动的ELF4传递温度信息，并建立一个从根到根的对话，在根中设定时钟的节奏。
The circadian clock is synchronized by environmental cues, mostly by light and temperature. Elucidating how the plant circadian clock responds to temperature oscillations is crucial to understand plant responsiveness to the environment. Here we found a prevalent temperature-dependent function of the Arabidopsis clock component ELF4 (EARLY FLOWERING 4) in the root clock. Micrografting assays and mathematical analyses show that ELF4 moves from shoots to regulate rhythms in roots. ELF4 movement does not convey photoperiodic information but trafficking is essential to control the period of the root clock in a temperature-dependent manner. At low temperatures, ELF4 mobility is favored and results in a slow-paced root clock while high temperatures decrease movement, leading to a fast clock. Hence, the mobile ELF4 delivers temperature information and establishes a shoot-to-root dialogue that sets the pace of the clock in roots.