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Journal of Agronomy
Year: 2009  |  Volume: 8  |  Issue: 2  |  Page No.: 79 - 83

Effects of Arbuscular Mycorrhizal Fungus on the Mineral Nutrition and Yield of Trifolium alexandrinum Plants under Salinity Stress

S. Shokri and B. Maadi    

Abstract: The aim of this study was to evaluate the effects of arbuscular mycorrhizal fungus on the mineral nutrition and yield of Trifolium alexandrinum plants under different salinity levels (2.2, 5 and 10 dS m-1). A pot experiment was conducted under glasshouse conditions in 2007. The results showed positive effects of inoculation with mycorrhizal fungi on total dry weight, root length and nutrient uptake of the T. alexandrinum at high and low salinity levels. Mycorrhizal colonization increased Total Dry Weight (TDW) of mycorrhizal plants 5.29 times more than control plants. In shoot system of non-AM plants, Na+ concentration was increased while the concentrations of K+, Mg2+ and Ca2+ were decreased with raising salinity stress. The Na+ level in shoots of AM plants showed slight increase with raising salinity levels. This experiment showed that phosphorus levels in the plants were reduced with increasing salinity but the AM plants showed higher values of phosphorus at all salinity levels. Thus, it could be concluded that AM fungi increased phosphorus uptake and saline stress in plants was thereby alleviated.

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