Florigen trafficking integrates photoperiod and temperature signals in Arabidopsis
Florigen trafficking integrates photoperiod and temperature signals in Arabidopsis
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DOI：
10.1111/jipb.13000
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发表时间：
2020-08-22
影响因子：
11.4
通讯作者：
Yu, Hao
中科院分区：
文献类型：
--
作者：
Liu, Lu;Zhang, Yu;Yu, Hao
向开花的过渡是开花植物中最显着的阶段变化，对于繁殖成功至关重要。植物中复杂的调节网络已经进化到能够感知和整合内源信号和环境信号。这些感知到的信号（包括日长和温度）汇聚到调节开花轨迹 T（FT），它编码拟南芥花诱导所需的移动刺激。尽管发现环境温度可调节 FT 信使 RNA (mRNA) 的表达，但 FT 蛋白的运输是否因生长温度的变化而受到控制目前尚不清楚。在这里，我们表明从伴随细胞到筛元件的 FT 传输是以温度依赖性方式控制的。该过程由多个 C2 结构域和跨膜区蛋白 (MCTP) 以及可溶性 N-乙基马来酰亚胺敏感因子蛋白附着蛋白受体 (SNARE) 介导。我们的研究结果表明，环境温度调节 FTmRNA 表达和 FT 蛋白运输，以防止低温下早熟，并确保植物在有利的环境条件下繁殖成功。
The transition to flowering is the most dramatic phase change in flowering plants and is crucial for reproductive success. A complex regulatory network in plants has evolved to perceive and integrate the endogenous and environmental signals. These signals perceived, including day length and temperature, converge to regulateFLOWERING LOCUS T(FT), which encodes a mobile stimulus required for floral induction inArabidopsis. Despite the discovery of modulation ofFTmessenger RNA (mRNA) expression by ambient temperature, whether the trafficking of FT protein is controlled in response to changes in growth temperature is so far unknown. Here, we show that FT transport from companion cells to sieve elements is controlled in a temperature-dependent manner. This process is mediated by multiple C2 domain and transmembrane region proteins (MCTPs) and a solubleN-ethylmaleimide-sensitive factor protein attachment protein receptor (SNARE). Our findings suggest that ambient temperatures regulate bothFTmRNA expression and FT protein trafficking to prevent precocious flowering at low temperatures and ensure plant reproductive success under favorable environmental conditions.