Arbuscular Mycorrhizal Symbiosis Alleviates Salt Stress in Black Locust through Improved Photosynthesis, Water Status, and K+/Na+ Homeostasis

doi:10.3389/fpls.2017.01739

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	Arbuscular Mycorrhizal Symbiosis Alleviates Salt Stress in Black Locust through Improved Photosynthesis, Water Status, and K+/Na+ Homeostasis
	Zhang, Xinlu 1; Tang, M (reprint author), Northwest A&F Univ, Coll Forestry, Yangling, Peoples R China.; Chen, Jie 1,2; Zhang, Haoqiang 1; Tang, Ming 1
刊名	FRONTIERS IN PLANT SCIENCE
	2017
卷号	8
关键词	Arbuscular Mycorrhizal Fungi Black Locust Photosynthesis Water Status Ion Homeostasis Salt Stress
ISSN号	1664-462X
DOI	10.3389/fpls.2017.01739
文献子类	Article
英文摘要	Soil salinization and the associated land degradation are major and growing ecological problems. Excess salt in soil impedes plant photosynthetic processes and root uptake of water and nutrients such as K+ Arbuscular mycorrhizal (AM) fungi can mitigate salt stress in host plants. Although, numerous studies demonstrate that photosynthesis and water status are improved by mycorrhizae, the molecular mechanisms involved have received little research attention. In the present study, we analyzed the effects of AM symbiosis and salt stress on photosynthesis, water status, concentrations of Na+ and K+, and the expression of several genes associated with photosynthesis (RppsbA, RppsbD, RprbcL, and RprbcS) and genes coding for aquaporins or membrane transport proteins involved in K+ and/or Na+ uptake, translocation, or compartmentalization homeostasis (RpSOS1, RpHKT1, RpNHX1, and RpSKOR) in black locust. The results showed that salinity reduced the net photosynthetic rate, stomatal conductance, and relative water content in both non-mycorrhizal (NM) and AM plants; the reductions of these three parameters were less in AM plants compared with NM plants. Under saline conditions, AM fungi significantly improved the net photosynthetic rate, quantum efficiency of photosystem II photochemistry, and K+ content in plants, but evidently reduced the Na+ content. AM plants also displayed a significant increase in the relative water content and an evident decrease in the shoot/root ratio of Na+ in the presence of 200 mM NaCl compared with NM plants. Additionally, mycorrhizal colonization upregulated the expression of three chloroplast genes (RppsbA, RppsbD, and RprbcL) in leaves, and three genes (RpSOS1, RpHKT1, and RpSKOR) encoding membrane transport proteins involved in K+/Na+ homeostasis in roots. Expression of several aquaporin genes was regulated by AM symbiosis in both leaves and roots depending on soil salinity. This study suggests that the beneficial effects of AM symbiosis on the photosynthetic capacity, water status, and K+/Na+ homeostasis lead to the improved growth performance and salt tolerance of black locust exposed to salt stress.
学科主题	Plant Sciences
URL标识	查看原文
出版地	LAUSANNE
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000412627200002
资助机构	National Natural Science Foundation of China [41671268]; Shaanxi Science and Technology Innovation Project Plan [2016KTCL02-07] ; National Natural Science Foundation of China [41671268]; Shaanxi Science and Technology Innovation Project Plan [2016KTCL02-07] ; National Natural Science Foundation of China [41671268]; Shaanxi Science and Technology Innovation Project Plan [2016KTCL02-07] ; National Natural Science Foundation of China [41671268]; Shaanxi Science and Technology Innovation Project Plan [2016KTCL02-07]
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7901]
专题	水保所科研产出--SCI_2017--SCI
通讯作者	Tang, M (reprint author), Northwest A&F Univ, Coll Forestry, Yangling, Peoples R China.
作者单位	1.Northwest A&F Univ, Coll Forestry, Yangling, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xinlu,Tang, M ,Chen, Jie,et al. Arbuscular Mycorrhizal Symbiosis Alleviates Salt Stress in Black Locust through Improved Photosynthesis, Water Status, and K+/Na+ Homeostasis[J]. FRONTIERS IN PLANT SCIENCE,2017,8.
APA	Zhang, Xinlu,Tang, M ,Chen, Jie,Zhang, Haoqiang,&Tang, Ming.(2017).Arbuscular Mycorrhizal Symbiosis Alleviates Salt Stress in Black Locust through Improved Photosynthesis, Water Status, and K+/Na+ Homeostasis.FRONTIERS IN PLANT SCIENCE,8.
MLA	Zhang, Xinlu,et al."Arbuscular Mycorrhizal Symbiosis Alleviates Salt Stress in Black Locust through Improved Photosynthesis, Water Status, and K+/Na+ Homeostasis".FRONTIERS IN PLANT SCIENCE 8(2017).