Distribution of vesicular-arbuscular mycorrhizal fungi in the natural ecosystem |
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Authors: | S Bhardwaj S S Dudeja A L Khurana |
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Institution: | (1) Department of Microbiology, Chaudhary Charan Singh Haryana Agricultural University Hisar, 125 004, India |
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Abstract: | Natural occurrence of vesicular-arbuscular mycorrhizal (VAM) fungi in Haryana soils showed that VAM sporulation was more intensive
in the rhizosphere of nonlegumes than of legumes. Maximum number of spores (342 spores per 50 g of soil) was observed in the
rhizosphere of mustard, followed by chickpea, wheat, pearl millet and pigeonpea. Four VAM generaviz. Glomus, Gigaspora, Sclerocystis andAcaulospora, were present there. Soil pH, total soil P, available P, type of soil, soil moisture and cropping season all variables influenced
the VA mycorrhizal population in the natural ecosystem. Numbers of VAM spores highly correlated with the presence of total
soil P and soil pH indirectly affected the VAM population through the total soil P. The spore population was abundant in sandy
soils as compared to loamy sands. Drier soils had higher number of VAM spores. In summer, the VAM population in soil was less
as compared to winter season. |
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