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The EMBO Journal:低温响应调控子CBF1能够在环境温度下促进拟南芥下胚轴生长

已有 455 次阅读 2020-5-28 08:43 |个人分类:每日摘要|系统分类:论文交流

The cold response regulator CBF1 promotes Arabidopsishypocotyl growth at ambient temperatures

第一作者Xiaojing Dong

第一单位中国农业大学

通讯作者Jigang Li


 Abstract 


研究基础Light and temperature are two core environmental factors that coordinately regulate plant growth and survival throughout their entire life cycle.


提出问题:However, the mechanisms integrating light and temperature signaling pathways in plants remain poorly understood.


主要发现:Here, we report that CBF 1, an AP 2/ERF ‐family transcription factor essential for plant cold acclimation, promotes hypocotyl growth under ambient temperatures in Arabidopsis.


结果:We show that CBF 1 increases the protein abundance of PIF 4 and PIF 5, two phytochrome‐interacting bHLH ‐family transcription factors that play pivotal roles in modulating plant growth and development, by directly binding to their promoters to induce their gene expression, and by inhibiting their interaction with phyB in the light. Moreover, our data demonstrate that CBF 1 promotes PIF 4/PIF 5 protein accumulation and hypocotyl growth at both 22°C and 17°C, but not at 4°C, with a more prominent role at 17°C than at 22°C.


结论:Together, our study reveals that CBF 1 integrates light and temperature control of hypocotyl growth by promoting PIF 4 and PIF 5 protein abundance in the light, thus providing insights into the integration mechanisms of light and temperature signaling pathways in plants.

CBF 1, a key regulator of plant cold acclimation, enhances Arabidopsis hypocotyl growth under ambient temperatures by promoting light‐dependent accumulation of phytochrome‐interacting transcription factors PIF 4 and PIF 5. CBF 1 thus integrates light and temperature control of hypocotyl growth in Arabidopsis.


 摘  要 


光和温度是两个影响植物整个生命周期中生长和存活的关键环境因子。然而,植物中负责整合光和温度信号的通路还有待深入研究。本文中,作者发现一个作用于植物低温适应的AP2/ERF转录因子CBF1,能够促进拟南芥植株在环境温度下的下胚轴生长。作者的研究显示CBF1增加了两个光敏色素互作因子PIF4/5的蛋白丰度,这两个蛋白属于bHLH家族成员,在植物的生长和发育调控方面发挥重要作用。CBF1能够直接结合到这两个基因的启动子区,促进这两个基因的表达,并且能够在光下抑制其与phyB的互作。此外,作者还发现CBF1能够在17°C和24°C温度下促进PIF4/5蛋白积累和下胚轴生长,但是在4°C下不行。综上,本文的研究揭示了CBF1整合光和温度信号,通过促进光下PIF4/5的蛋白丰度来控制下胚轴的生长,从而为植物中的光和温度信号通路相关机制研究提供了新的视野。


 通讯作者 


**李继刚**


个人简介:

1997-2001年,华东理工大学,学士;

2001-2006年,北京大学,博士;

2007-2013年,美国耶鲁大学,博士后。


研究方向:

植物光形态建成与逆境应答:

    1. 光敏色素A信号传导途径的分子机理;

    2. 光信号传导与植物逆境应答反应的交互作用。


doi: 10.15252/embj.2019103630


Journal: The EMBO Journal

Published date: May 25, 2020


p.s. 植物CBF1往期相关研究:



http://blog.sciencenet.cn/blog-3158122-1235290.html

上一篇:Nature Plants:拟南芥和独脚金中绕过GA通路的种子萌芽机制
下一篇:PNAS:茄科植物单性结实基因Pad-1的功能鉴定

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