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	Salt modulates gravity signaling pathway to regulate growth direction of primary roots in arabidopsis
	Sun, Feifei1; Zhang, Wensheng1; Hu, Haizhou1; Li, Bao; Wang, Youning1,2; Zhao, Yankun1,2; Li, Kexue1; Liu, Mengyu1; Li, Xia1
刊名	Plant physiology
	2008
卷号	146期号:1页码:178-188
ISSN号	0032-0889
DOI	10.1104/pp.107.109413
通讯作者	Li, xia(xli@genetics.ac.cn)
英文摘要	Plant root architecture is highly plastic during development and can adapt to many environmental stresses. the proper distribution of roots within the soil under various conditions such as salinity, water deficit, and nutrient deficiency greatly affects plant survival. salinity profoundly affects the root system architecture of arabidopsis (arabidopsis thaliana). however, despite the inhibitory effects of salinity on root length and the number of roots, very little is known concerning influence of salinity on root growth direction and the underlying mechanisms. here we show that salt modulates root growth direction by reducing the gravity response. exposure to salt stress causes rapid degradation of amyloplasts in root columella cells of arabidopsis. the altered root growth direction in response to salt was found to be correlated with pin-formed2 (pin2) messenger rna abundance and expression and localization of the protein. furthermore, responsiveness to gravity of salt overly sensitive (sos) mutants is substantially reduced, indicating that salt-induced altered gravitropism of root growth is mediated by ion disequilibrium. mutation of sos genes also leads to reduced amyloplast degradation in root tip columella cells and the defects in pin2 gene expression in response to salt stress. these results indicate that the sos pathway may mediate the decrease of pin2 messenger rna in salinity-induced modification of gravitropic response in arabidopsis roots. our findings provide new insights into the development of a root system necessary for plant adaptation to high salinity and implicate an important role of the sos signaling pathway in this process.
WOS关键词	AUXIN TRANSPORT ; HYDROTROPIC-RESPONSE ; CAP CELLS ; GRAVITROPISM ; PLANTS ; TOLERANCE ; COLUMELLA ; STRESS ; EFFLUX ; PH
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
语种	英语
出版者	AMER SOC PLANT BIOLOGISTS
WOS记录号	WOS:000252093100016
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2389640
专题	中国科学院大学
通讯作者	Li, Xia
作者单位	1.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources, State Key Lab Plant Cell & Chromosome Engn, Shijiazhuang 050021, Hebei, Peoples R China 2.Grad Univ, Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Sun, Feifei,Zhang, Wensheng,Hu, Haizhou,et al. Salt modulates gravity signaling pathway to regulate growth direction of primary roots in arabidopsis[J]. Plant physiology,2008,146(1):178-188.
APA	Sun, Feifei.,Zhang, Wensheng.,Hu, Haizhou.,Li, Bao.,Wang, Youning.,...&Li, Xia.(2008).Salt modulates gravity signaling pathway to regulate growth direction of primary roots in arabidopsis.Plant physiology,146(1),178-188.
MLA	Sun, Feifei,et al."Salt modulates gravity signaling pathway to regulate growth direction of primary roots in arabidopsis".Plant physiology 146.1(2008):178-188.

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