Activation of HLS1 by Mechanical Stress via Ethylene-Stabilized EIN3 Is   Crucial for Seedling Soil Emergence

doi:10.3389/fpls.2015.01571

CORC > 北京大学 > 生命科学学院

	Activation of HLS1 by Mechanical Stress via Ethylene-Stabilized EIN3 Is Crucial for Seedling Soil Emergence
	Shen, Xing ; Li, Yanli ; Pan, Ying ; Zhong, Shangwei
刊名	FRONTIERS IN PLANT SCIENCE
	2016
关键词	seedling emergence soil mechanical pressure apical hook HLS1 ethylene signaling EBF1 and EBF2 EIN3/EIL1 APICAL HOOK DEVELOPMENT ARABIDOPSIS SEEDLINGS TRANSCRIPTION FACTOR DIFFERENTIAL GROWTH SIGNAL-TRANSDUCTION SHOOT GRAVITROPISM RESPONSE PATHWAY PLANT-RESPONSES LIGHT CONTROL GENE
DOI	10.3389/fpls.2015.01571
英文摘要	The seeds of terrestrial flowering plants often start their life cycle in subterranean darkness. To protect the fragile apical meristematic tissues and cotyledons from mechanical injuries during soil penetration, dicotyledonous seedlings form an elegant apical hook at the top of the hypocotyl. The apical hook has been considered as an adaption structure to the subterranean environment. However, the role of the apical hook in seedling emergence and the molecular mechanism of apical hook formation under real-life conditions remain highly speculative. Here, we find that HOOKLESS 1 (HLS1), a critical gene in apical hook formation in Arabidopsis thaliana, is required for seedling emergence from the soil. When grown under soil, hls1 mutant exhibits severe emergence defects. By contrast, HLS1 overexpression in the hls1 background fully restores emergence defects and displays better emergence capacity than that of WT. Our results indicate that HLS1 transcription is stimulated in response to the mechanical stress of soil cover, which is dependent on the function of the transcription factors ETHYLENE INSENSITIVE 3 (EIN3) and EIN3-LIKE 1 (EIL1). Soil-conferred mechanical stress activates the ethylene signaling pathway to stabilize EIN3 by repressing the activity of the F-box proteins EBF1 and EBF2. These combined results reveal a signaling pathway in which plant seedlings transduce the mechanical pressure of soil cover to correctly modulate apical hook formation during soil emergence.; National Key Research and Development Program of China [2016YFA0502900]; National Science Foundation of China [31570188]; China Postdoctoral Science Foundation [2016M591010]; SCI(E); ARTICLE; shangwei.zhong@pku.edu.cn; 7
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/458695]
专题	生命科学学院
推荐引用方式 GB/T 7714	Shen, Xing,Li, Yanli,Pan, Ying,et al. Activation of HLS1 by Mechanical Stress via Ethylene-Stabilized EIN3 Is Crucial for Seedling Soil Emergence[J]. FRONTIERS IN PLANT SCIENCE,2016.
APA	Shen, Xing,Li, Yanli,Pan, Ying,&Zhong, Shangwei.(2016).Activation of HLS1 by Mechanical Stress via Ethylene-Stabilized EIN3 Is Crucial for Seedling Soil Emergence.FRONTIERS IN PLANT SCIENCE.
MLA	Shen, Xing,et al."Activation of HLS1 by Mechanical Stress via Ethylene-Stabilized EIN3 Is Crucial for Seedling Soil Emergence".FRONTIERS IN PLANT SCIENCE (2016).