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Influence of VAM Fungi on Mineral Elements Concentration and Composition in Bromus inermis under Salinity Stress

Feng Gu Yang Maoqiu Bai Dengsha (Institute of Nuclear Technology and Biotechnology of Xinjiang Academy of Agricultural Sciences, Urumqi 830000)  
The influence of vesicular-arbuscular mycorrhizal fungi on the growth of and mineral elements accumulation in Bromus inermis under salt-caused stress conditions was studied at the levels of 0,1,2,3 g/kg NaCl added to the soil for the potted plant. It was shown that the biomass of the plant declined with an increased NaCl level, and, at a given NaCl level, the biomass of the individuals inoculated with VAM fungi was higher than that of the individuals without the inoculation treatment. The result indicated that VAM fungi had a promoting effect on the growth of the plant under salt-caused stress, and it seemed more so with an increased degree of the stress. It was also observed that the content of P in the plant under NaCl stress was increased by VAM fungi, while the content of Na and the ratios of Na/K, Na/Ca, Na/P and Cl/P were decreased. At a high NaCl level (2 g/kg) VAM fungi significantly increased the contents of N and K in the plant. It could be concluded that the mechanism of VAM fungi in improving the salt tolerance of Bromus inermis was in that the fungi can improve the nutritional condition of the plant by increasing the contents of N and P while decreasing the relative concentration of Na and Cl in the plant.
【Fund】: 国家自然科学基金
【CateGory Index】: S543.8
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