干旱区生态环境知识资源中心(Arid): NaCl stimulates growth and alleviates drought stress in the salt-secreting xerophyte Reaumuria soongorica

Arid

DOI	10.1016/j.envexpbot.2019.03.014
	NaCl stimulates growth and alleviates drought stress in the salt-secreting xerophyte Reaumuria soongorica
	He, Fang-Lan 1,2; Bao, Ai-Ke 1; Wang, Suo-Min 1; Jin, Hong-Xi 2
通讯作者	Bao, Ai-Ke ; Wang, Suo-Min
来源期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
EISSN	1873-7307
出版年	2019
卷号	162 页码:433-443
英文摘要	Reaumuria soongorica, a salt-secreting xerophytic shrub, is a dominant species in arid desert regions of northwest China. To investigate whether NaCl could stimulate the growth and alleviate drought stress in R. soongorica, the seedlings were treated with a range of different concentrations of 0-1.17 g kg(-1) NaCl, and also were withheld water for drought stress under without or supplementary 0.59 g kg(-1) NaCl. The results showed that 0.59 g kg-(NaCl)-Na-l (moderate NaCl) significantly stimulated the growth of R soongorica, and also effectively alleviated deleterious impacts of drought stress on its growth and leaf morphological structure. Further analysis showed that moderate NaCl significantly improved photosynthetic capacity and mitigated light suppression of drought stress on photosystem II in R. soongorica, concomitantly, decreased osmotic potential, enlarged turgor pressure as well as increased the relative water content in leaves under drought stress. Furthermore, moderate NaCl induced an obvious increase of Na+ accumulation in tissues of R. soongorica, which resulted in a significant increase of the contribution of Na+ to leaf osmotic potential from13 to 22% under drought stress. Additionally, moderate NaCl also promoted Na+ secretion via salt glands of leaf. These results suggest that the positive roles of NaCl on the growth and drought resistance of R. soongorica is due to the increase of Na+ accumulating in leaf tissues, facilitating plant to maintain higher photosynthetic activity and better water status in arid environment, simultaneously, salt secretion of salt glands protects plant from excess Na+ toxicity.
英文关键词	Reaumuria soongorica Growth Na+ Drought stress Osmotic adjustment Salt secretion
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000467507700043
WOS关键词	CHLORIDE IMPROVES PHOTOSYNTHESIS ; OSMOTIC ADJUSTMENT ; PHOTOSYSTEM-II ; WATER-STRESS ; SODIUM ; LEAF ; RESPONSES ; NA+ ; ULTRASTRUCTURE ; TOLERANCE
WOS类目	Plant Sciences ; Environmental Sciences
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215388
作者单位	1.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Gansu, Peoples R China; 2.Gansu Desert Control Res Inst, Lanzhou 733070, Gansu, Peoples R China
推荐引用方式 GB/T 7714	He, Fang-Lan,Bao, Ai-Ke,Wang, Suo-Min,et al. NaCl stimulates growth and alleviates drought stress in the salt-secreting xerophyte Reaumuria soongorica[J]. 兰州大学,2019,162:433-443.
APA	He, Fang-Lan,Bao, Ai-Ke,Wang, Suo-Min,&Jin, Hong-Xi.(2019).NaCl stimulates growth and alleviates drought stress in the salt-secreting xerophyte Reaumuria soongorica.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,162,433-443.
MLA	He, Fang-Lan,et al."NaCl stimulates growth and alleviates drought stress in the salt-secreting xerophyte Reaumuria soongorica".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 162(2019):433-443.