拟南芥
茉莉酸
生长素
光敏色素
茉莉酸
拟南芥
形态发生
细胞生物学
转录因子
光形态发生
下胚轴
信号转导
植物
远红色
茉莉酸甲酯
生物
生物化学
红灯
基因
突变体
作者
Junling Huai,Nan Gao,Yuanyuan Yao,Yutong Du,Qiang Guo,Rongcheng Lin
标识
DOI:10.1093/plphys/kiae143
摘要
Light and temperature are two major environmental factors that affect growth and development of plants during their life cycle. Plants have evolved complex mechanisms to adapt to varying external environments. Here, we show that JASMONATE ZIM-domain protein 3 (JAZ3), a jasmonic acid signaling component, acts as a factor to integrate light and temperature in regulating seedling morphogenesis. JAZ3 overexpression transgenic lines display short hypocotyls under red, far-red, and blue light and warm temperature (28 °C) conditions compared to the wild type in Arabidopsis (Arabidopsis thaliana). We show that JAZ3 interacts with the transcription factor PHYTOCHROME-INTERACTING FACTOR4 (PIF4). Interestingly, JAZ3 spontaneously undergoes liquid-liquid phase separation (LLPS) in vitro and in vivo and promotes LLPS formation of PIF4. Moreover, transcriptomic analyses indicate that JAZ3 regulates the expression of genes involved in many biological processes, such as response to auxin, auxin-activated signaling pathway, regulation of growth, and response to red light. Finally, JAZ3 inhibits the transcriptional activation activity and binding ability of PIF4. Collectively, our study reveals a function and molecular mechanism of JAZ3 in regulating plant growth in response to environmental light and temperature.
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