干旱区生态环境知识资源中心(Arid): Response of nodulation, nitrogen fixation to salt stress in a desert legume Alhagi sparsifolia

Arid

DOI	10.1016/j.envexpbot.2020.104348
	Response of nodulation, nitrogen fixation to salt stress in a desert legume Alhagi sparsifolia
	Li, Meimei; Petrie, Matthew D.; Tariq, Akash; Zeng, Fanjiang
通讯作者	Zeng, FJ (corresponding author), 818 South Beijing Rd, Urumqi 830011, Xinjiang, Peoples R China.
来源期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
EISSN	1873-7307
出版年	2021
卷号	183
英文摘要	Salinity has adverse effects on the nitrogen (N) metabolism of legumes in dryland ecosystems. Although the response of biological N fixation (BNF) to salt stress has received much research attention, less is known about how N fixing plants may adjust their N acquisition strategies in response to variation in salt stress. Alhagi sparsifolia, a perennial deep-rooted legume located in both riparian and desert environments of the hyperarid Taklimakan Desert, China, is a regionally important species due to its capacity for fixing atmospheric N and increasing soil stability. We investigated how groundwater biogeochemistry was related to seasonal differences in BNF of Alhagi sparsifolia located at terminal ends of a soil salinity gradient (high salinity riparian; inland low salinity sand dunes) in the Taklimakan Desert. Additionally, to elucidate the plasticity of A. sparsifolia nitrogen fixation to variation in soil salinity, we experimentally treated Alhagi seedlings from the same parental lineage with NaCl, Na2SO4, NH4NO3, and groundwater, and evaluated N fixation potential via root nodule development. We did not find evidence that mineral nitrogen concentrations influenced the varied N-2 fixation rates (indicated by foliar d15N value) in A. sparsifolia that we observed in the field. Instead, BNF of Alhagi plants was higher in high salinity riparian areas, whereas these plants utilized groundwater N when located in low salinity inland sand dunes. In our experimental treatments, salt addition did not significantly influence the nodulation of Alhagi seedlings, suggesting that nitrate assimilation instead of BNF is suppressed by salt stress. Thus, BNF in A. sparsifolia is tolerant to salt stress, and can be adjusted in response to variation in N availability and soil salinity. Relationships between salt tolerance and biological nitrogen fixation in A. sparsifolia explains how these species can increase soil nutrient availability across differing dryland environments, and illustrates a possible strategy whereby dryland legumes enhance their adaptability to saline environments by both building symbiotic associations with Rhizobium and utilizing readily available N when salt stress is less prohibitive.
英文关键词	Arid Dryland Taklimakan desert Riparian N-2 fixation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000608802700014
WOS关键词	PERENNIAL PLANTS ; RIVER OASIS ; SALINITY ; VEGETATION ; N-15 ; GROWTH ; METABOLISM ; SYMBIOSIS ; ENZYMES
WOS类目	Plant Sciences ; Environmental Sciences
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347845
作者单位	[Li, Meimei; Tariq, Akash; Zeng, Fanjiang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Desert Plant Roots Ecol & Vegeta, Urumqi 830011, Peoples R China; [Li, Meimei; Tariq, Akash; Zeng, Fanjiang] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Li, Meimei; Tariq, Akash; Zeng, Fanjiang] Cele Natl Stn Observat & Res Desert Grassland Eco, Qira 848300, Peoples R China; [Li, Meimei; Tariq, Akash] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, Meimei; Petrie, Matthew D.] Univ Nevada, Sch Life Sci, Las Vegas, NV 89154 USA
推荐引用方式 GB/T 7714	Li, Meimei,Petrie, Matthew D.,Tariq, Akash,et al. Response of nodulation, nitrogen fixation to salt stress in a desert legume Alhagi sparsifolia[J]. 中国科学院新疆生态与地理研究所,2021,183.
APA	Li, Meimei,Petrie, Matthew D.,Tariq, Akash,&Zeng, Fanjiang.(2021).Response of nodulation, nitrogen fixation to salt stress in a desert legume Alhagi sparsifolia.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,183.
MLA	Li, Meimei,et al."Response of nodulation, nitrogen fixation to salt stress in a desert legume Alhagi sparsifolia".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 183(2021).