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Publication Type J
Authors Diao, F. W., Z. H. Dang, J. Xu, S. L. Ding, B. H. Hao, Z. C. Zhang, J. X. Zhang, L. X. Wang and W. Guo
Title Effect of arbuscular mycorrhizal symbiosis on ion homeostasis and salt tolerance-related gene expression in halophyte Suaeda salsa under salt treatments
Source Microbiological Research
Author Keywords Halophyte Arbuscular mycorrhizal fungi Ion homeostasis NHX1 SOS1 PIP
Abstract Halophytes can remove large quantities of salts from saline soils, so their importance in ecology has received increasing attention. Preliminary studies have shown that arbuscular mycorrhizal (AM) fungi can improve the salt tolerance of halophytes. However, few studies have focused on the molecular mechanisms and effects of AM fungi in halophytes under different salt conditions. A pot experiment was carried out to investigate the effects of Funneliformis mosseae inoculation on growth, nutrient uptake, ion homeostasis and the expression of salt tolerance-related genes in Suaeda salsa under 0, 100, 200 and 400 mM NaCl. The results showed that F. mosseae promoted the growth of S. salsa and increased the shoot Ca2+ and Mg2+ concentrations under no-salt condition and high-salt condition. In addition, AM fungi increased the K+ concentration and maintained a high K+/Na+ ratio at 400 mM NaCl, while AM fungi decreased the K+ concentration and reduced the K+/Na+ ratio at 0 mM NaCl. AM fungi downregulated the expression of SsNHX1 in shoots and the expression of SsSOS1 in roots at 400 mM NaCl. These effects may decrease the compartmentation of Na+ into leaf vacuoles and restrict Na+ transport from roots to shoots, leading to an increase in root Na+ concentration. AM symbiosis upregulated the expression of SsSOS1 in shoots and downregulated the expression of SsSOS1 and SsNHX1 in roots at 100 mM NaCl. However, regulation of the genes (SsNHX1, SsSOS, SsVHA-B and SsPIP) was not significantly different with AM symbiosis at 0 mM or 200 mM NaCl. The results revealed that AM symbiosis might induce diverse modulation strategies in S. salsa, depending on external Na+ concentrations. These findings suggest that AM fungi may play significant ecological roles in the phytoremediation of salinized ecosystems. Superscript/Subscript Available
Author Address [Diao, Fengwei; Dang, Zhenhua; Xu, Jing; Ding, Shengli; Hao, Baihui; Zhang, Zhechao; Zhang, Jingxia; Wang, Lixin; Guo, Wei] Inner Mongolia Univ, Inner Mongolia Key Lab Environm Pollut Control &, Key Lab Ecol & Resource Use Mongolian Plateau, Sch Ecol & Environm,Minist Educ, Hohhot 010021, Inner Mongolia, Peoples R China. Dang, ZH; Guo, W (corresponding author), Inner Mongolia Univ, 235 West Univ Rd, Hohhot 010021, Inner Mongolia, Peoples R China. zhdang_1982@aliyun.com; ndguowei@163.com
ISSN 0944-5013
ISBN 0944-5013
29-Character Source Abbreviation Microbiol. Res.
Publication Date Apr
Year Published 2021
Volume 245
Digital Object Identifier (DOI) 10.1016/j.micres.2020.126688
Unique Article Identifier WOS:000626148000006
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