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Arbuscular mycorrhizas improve plant growth and soil structure in trifoliate orange under salt stress

文献类型： 外文期刊

作者： Zhang, Yi-Can 1 ; Wang, Peng 3 ; Wu, Qing-Hua 4 ; Zou, Ying-Ning 1 ; Bao, Qian 1 ; Wu, Qiang-Sheng 1 ;

作者机构： 1.Yangtze Univ, Coll Hort & Gardening, Jingzhou, Peoples R China

2.Yangtze Univ, Inst Root Biol, Jingzhou, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Citrus Res, Taizhou, Peoples R China

4.Univ Hradec Kralove, Fac Informat & Management, Ctr Basic & Appl Res, Hradec Kralove, Czech Republic

5.Univ Hradec Kralove, Dept Chem, Fac Sci, Hradec Kralove, Czech Republic

关键词： Aggregate;arbuscular mycorrhizal fungi;citrus;glomalin;NaCl stress

期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：3.092； 五年影响因子：2.745 ）

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收录情况： SCI

摘要： Arbuscular mycorrhizal fungi (AMF) as a biostimulant enhance salt tolerance in plants, while the informations regarding AMF-induced changes in soil structure are only available to a limited degree. In this study, trifoliate orange (Poncirus trifoliata) seedlings were inoculated with Diversispora versiformis under 100 mM NaCl for 85 days. The salt stress considerably inhibited mycorrhizal colonization by 26%, compared with non-salt stress. Mycorrhizal inoculation significantly increased plant height, stem diameter, leaf number, shoot biomass, and root biomass, length, surface area, and volume in comparison to non-mycorrhizal inoculation under salt stress or non-salt stress. Mycorrhization induced significantly higher production of easily extractable glomalin-related soil protein (EE-GRSP), and total glomalin-related soil protein (T-GRSP), higher percentage of water-stable aggregates (WSAs) in 0.25-0.50, 0.50-1.00, and 1.00-2.00 mm size, and lower in 2.00-4.00 mm size, regardless of non-salt stress or salt stress. Mycorrhizal soils represented higher aggregate stability (in terms of mean weight diameter) under salt and non-salt stress, which was related with root colonization, root surface area, root volume, EE-GRSP, and T-GRSP. The better soil structure by mycorrhization provided higher leaf water potential under salt stress. It suggests that mycorrhizas had a positive contribution to improve plant growth and soil structure, thereby enhancing salt tolerance.

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