Shoot-to-Root Mobile Transcription Factor HY5 Coordinates Plant Carbon and Nitrogen Acquisition

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	Shoot-to-Root Mobile Transcription Factor HY5 Coordinates Plant Carbon and Nitrogen Acquisition
	Chen, Xiangbin ; Yao, Qinfang ; Gao, Xiuhua ; Jiang, Caifu ; Harberd, Nicholas P. ; Fu, Xiangdong
刊名	CURRENT BIOLOGY
	2016
卷号	26 期号:5 页码:640-646
关键词	SEEDLING DEVELOPMENT FLORAL INDUCTION LIGHT CONTROL FT PROTEIN ARABIDOPSIS NITRATE PHLOEM NUTRIENT SIGNAL DESTABILIZATION
ISSN号	0960-9822
中文摘要	Coordination of shoot photosynthetic carbon fixation with root inorganic nitrogen uptake optimizes plant performance in a fluctuating environment [1]. However, the molecular basis of this long-distance shoot-root coordination is little understood. Here we show that Arabidopsis ELONGATED HYPOCOTYL5 (HY5), a bZIP transcription factor that regulates growth in response to light [2, 3], is a shoot-to-root mobile signal that mediates light promotion of root growth and nitrate uptake. Shoot-derived HY5 auto-activates root HY5 and also promotes root nitrate uptake by activating NRT2.1, a gene encoding a high-affinity nitrate transporter [4]. In the shoot, HY5 promotes carbon assimilation and translocation, whereas in the root, HY5 activation of NRT2.1 expression and nitrate uptake is potentiated by increased carbon photoassimilate (sucrose) levels. We further show that HY5 function is fluence-rate modulated and enables homeostatic maintenance of carbon-nitrogen balance in different light environments. Thus, mobile HY5 coordinates light-responsive carbon and nitrogen metabolism, and hence shoot and root growth, in a whole-organismal response to ambient light fluctuations.
收录类别	SCI
原文出处	10.1016/j.cub.2015.12.066
语种	英语
公开日期	2016-05-12
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/9789]
专题	西双版纳热带植物园_文献共享
推荐引用方式 GB/T 7714	Chen, Xiangbin,Yao, Qinfang,Gao, Xiuhua,et al. Shoot-to-Root Mobile Transcription Factor HY5 Coordinates Plant Carbon and Nitrogen Acquisition[J]. CURRENT BIOLOGY,2016,26(5):640-646.
APA	Chen, Xiangbin,Yao, Qinfang,Gao, Xiuhua,Jiang, Caifu,Harberd, Nicholas P.,&Fu, Xiangdong.(2016).Shoot-to-Root Mobile Transcription Factor HY5 Coordinates Plant Carbon and Nitrogen Acquisition.CURRENT BIOLOGY,26(5),640-646.
MLA	Chen, Xiangbin,et al."Shoot-to-Root Mobile Transcription Factor HY5 Coordinates Plant Carbon and Nitrogen Acquisition".CURRENT BIOLOGY 26.5(2016):640-646.