SbHKT1;4, a member of the high-affinity potassium transporter gene family from Sorghum bicolor, functions to maintain optimal Na+/K+ balance under Na+ stress

doi:10.1111/jipb.12144

	SbHKT1;4, a member of the high-affinity potassium transporter gene family from Sorghum bicolor, functions to maintain optimal Na+/K+ balance under Na+ stress
	Wang, Tian-Tian ; Ren, Zhi-Jie ; Liu, Zhi-Quan ; Feng, Xue 3; Guo, Rui-Qi ; Li, Bao-Guo ; Li, Le-Gong ; Jing, Hai-Chun
	2014
发表期刊	JOURNAL OF INTEGRATIVE PLANT BIOLOGY
ISSN	1672-9072
卷号	56 期号:3 页码:315-332
摘要	In halophytic plants, the high-affinity potassium transporter HKT gene family can selectively uptake K+ in the presence of toxic concentrations of Na+. This has so far not been well examined in glycophytic crops. Here, we report the characterization of SbHKT1;4, a member of the HKT gene family from Sorghum bicolor. Upon Na+ stress, SbHKT1;4 expression was more strongly upregulated in salt-tolerant sorghum accession, correlating with a better balanced Na+/K+ ratio and enhanced plant growth. Heterogeneous expression analyses in mutants of Saccharomyces cerevisiae and Arabidopsis thaliana indicated that overexpressing SbHKT1;4 resulted in hypersensitivity to Na+ stress, and such hypersensitivity could be alleviated with the supply of elevated levels of K+, implicating that SbHKT1;4 may mediate K+ uptake in the presence of excessive Na+. Further electrophysiological evidence demonstrated that SbHKT1;4 could transport Na+ and K+ when expressed in Xenopus laevis oocytes. The relevance of the finding that SbHKT1;4 functions to maintain optimal Na+/K+ balance under Na+ stress to the breeding of salt-tolerant glycophytic crops is discussed.
关键词	High-affinity potassium transporter (HKT) Na+ K+ ratio Na+ stress salt tolerance Sorghum bicolor
学科领域	Biochemistry & Molecular Biology ; Plant Sciences
DOI	10.1111/jipb.12144
收录类别	SCI
语种	英语
WOS关键词	SALT TOLERANCE ; HKT TRANSPORTERS ; SODIUM-TRANSPORT ; SALINITY TOLERANCE ; K+ TRANSPORT ; PUCCINELLIA-TENUIFLORA ; ARABIDOPSIS-THALIANA ; CATION SELECTIVITY ; RICE OSHKT2/1 ; PLANTS
WOS研究方向	Biochemistry & Molecular Biology ; Plant Sciences
WOS记录号	WOS:000332522600010
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1744-7909
资助机构	One Hundred Talents Program of the Chinese Academy of Sciences [KSCX2-YW-G-067] ; National Science Foundation [Y4643A1001]
作者邮箱	lglii@mail.cnu.edu ; hcjing@ibcas.ac.cn
作品OA属性	Bronze
引用统计	被引频次：57[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/27170
专题	中科院北方资源植物重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing 100093, Peoples R China 2.Capital Normal Univ, Coll Life Sci, Beijing 100048, Peoples R China 3.China Agr Univ, Coll Resources & Environm Sci, Lab Soil & Water, Beijing 100193, Peoples R China 4.E China Normal Univ, Sch Life Sci, Shanghai Key Lab Urbanizat & Ecol Restorat, Shanghai 200062, Peoples R China
推荐引用方式 GB/T 7714	Wang, Tian-Tian,Ren, Zhi-Jie,Liu, Zhi-Quan,et al. SbHKT1;4, a member of the high-affinity potassium transporter gene family from Sorghum bicolor, functions to maintain optimal Na+/K+ balance under Na+ stress[J]. JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2014,56(3):315-332.
APA	Wang, Tian-Tian.,Ren, Zhi-Jie.,Liu, Zhi-Quan.,Feng, Xue.,Guo, Rui-Qi.,...&Jing, Hai-Chun.(2014).SbHKT1;4, a member of the high-affinity potassium transporter gene family from Sorghum bicolor, functions to maintain optimal Na+/K+ balance under Na+ stress.JOURNAL OF INTEGRATIVE PLANT BIOLOGY,56(3),315-332.
MLA	Wang, Tian-Tian,et al."SbHKT1;4, a member of the high-affinity potassium transporter gene family from Sorghum bicolor, functions to maintain optimal Na+/K+ balance under Na+ stress".JOURNAL OF INTEGRATIVE PLANT BIOLOGY 56.3(2014):315-332.

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