ZxNHX1 indirectly participates in controlling K+ homeostasis in the xerophyte Zygophyllum xanthoxylum

doi:10.1071/FP20185

	ZxNHX1 indirectly participates in controlling K+ homeostasis in the xerophyte Zygophyllum xanthoxylum
	Gao, Tian-Ge 1,4,5; Ma, Cui-Min 1,4,5; Yuan, Hui-Jun 1,3,4,5; Liu, Hai-Shuang 1,4,5; Ma, Qing 1,4,5; Flowers, Timothy J.2; Wang, Suo-Min 1,4,5
刊名	FUNCTIONAL PLANT BIOLOGY
	2021
卷号	48 期号:4 页码:402-410
关键词	K+ transport Na+ transport osmotic stress succulent xerophyte ZxNHX1 Zygophyllum xanthoxylum
ISSN号	1445-4408
DOI	10.1071/FP20185
英文摘要	The succulent xerophyte Zygophyllum xanthoxylum (Bunge) Engl. can absorb Na+ from the soil as an osmoticum in order to resist osmotic stress. The tonoplast Na+/H+ antiporter ZxNHX1 is essential for maintaining the salt-accumulation characteristics of Z. xanthoxylum by compartmentalizing Na+ into vacuoles. Previous results revealed that the silencing of ZxNHX1 greatly decreased Na+ accumulation in Z. xanthoxylum under 50 mM NaCl due to the weakened compartmentalisation; in addition, K+ concentration also significantly reduced in ZxNHX1-RNAi lines. Yet, whether the reduction of K+ concentration was directly triggered by the silencing of ZxNHX1 remains unclear. In this study, the growth parameters and expression levels of ZxSOS1, ZxHKT1;1, ZxAKT1 and ZxSKOR were measured in wild-type and ZxNHX1-RNAi lines under control or -0.5 MPa osmotic stress. The results showed that the silencing of ZxNHX1 inhibited the plant growth, decreased Na+ concentration in leaves, reduced the transcript abundance of ZxSOS1 and dramatically increased that of ZxHKT1;1 in roots of Z. xanthoxylum under osmotic stress; whereas tissue K+ concentrations and the expression level of ZxSKOR displayed no significant variations, and the expression of ZxAKT1 were significantly reduced in ZxNHX1-RNAi lines under osmotic stress, compared with the wild type. These results suggest that in Z. xanthoxylum, ZxNHX1 can maintain the normal growth by compartmentalizing Na+ into vacuoles, and regulate the spatial distribution of Na+ indirectly by affecting the expressions of ZxSOS1 and ZxHKT1;1. Moreover, the silencing of ZxNHX1 is not the main reason that led to the reduction of K+ concentration in ZxNHX1-RNAi lines under 50 mM NaCl, and ZxNHX1 might be indirectly involved in regulating K+ homeostasis.
WOS研究方向	Plant Sciences
语种	英语
出版者	CSIRO PUBLISHING
WOS记录号	WOS:000596034300001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148964]
专题	生命科学与工程学院
作者单位	1.Lanzhou Univ, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Peoples R China; 2.Univ Sussex, Sch Life Sci, Dept Evolut Behav & Environm, Brighton BN1 9QG, Sussex, England 3.Lanzhou Univ Technol, Sch Life Sci & Engn, Lanzhou 730050, Peoples R China; 4.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China; 5.Lanzhou Univ, Minist Agr & Rural Affairs, Key Lab Grassland Livestock Ind Innovat, Lanzhou 730020, Peoples R China;
推荐引用方式 GB/T 7714	Gao, Tian-Ge,Ma, Cui-Min,Yuan, Hui-Jun,et al. ZxNHX1 indirectly participates in controlling K+ homeostasis in the xerophyte Zygophyllum xanthoxylum[J]. FUNCTIONAL PLANT BIOLOGY,2021,48(4):402-410.
APA	Gao, Tian-Ge.,Ma, Cui-Min.,Yuan, Hui-Jun.,Liu, Hai-Shuang.,Ma, Qing.,...&Wang, Suo-Min.(2021).ZxNHX1 indirectly participates in controlling K+ homeostasis in the xerophyte Zygophyllum xanthoxylum.FUNCTIONAL PLANT BIOLOGY,48(4),402-410.
MLA	Gao, Tian-Ge,et al."ZxNHX1 indirectly participates in controlling K+ homeostasis in the xerophyte Zygophyllum xanthoxylum".FUNCTIONAL PLANT BIOLOGY 48.4(2021):402-410.