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T hree well-known medicinally important plants of Solanac eae viz., Solanum nigrum, Solanum torv um and Nic otiana plumbaginifolia of Ballavpur W ildlif e Sanc tuary (BW LS) were ass es sed for determination of mycorrhizal association in terms of % root colonization, spore density, species richness and relative abundance.All three selected plants showed sufficient internal hyphae; however, the number of vesicles and arbuscules varies from plant to plant.Maximum root colonization percentage was recorded in Solanum nigrum (74%), followed by Solanum torvum (72%) and the lowest (67%) was noticed in Nicotiana plumbaginifolia.Of all three plants, spore density and species richness were noticed maximum in S. torvum, followed by S. nigrum and minimum in N. plumbaginifolia.Altogether, 15 different AM fungal species belonging to 6 genera viz., Glomus, Acaulospora,Scutellospora, Claroideglomus, Diversispora and Gigaspora,were isolated from all three selected plants; however, their isolation frequency, relative abundance and species richness were found to vary from plant to plant.Among all AM fungi, three species of Glomus viz., G. intraradices, G. fasciculatum, and G. mosseaeand three species of Acaulospora viz., A. nicolsonii, A. laevis and A. mella are commonly present in all three selected plant with high relative abundance (above 30) and is considered as dominant AM species of BW LS.The present investigation reveals that Glomus and Acaulospora predominate over Scutellospora, Claroideglomus, Diversispora and Gigaspora.A significant positive correlation between root colonization, spore density,and species richness was recorded, and the maximum mycorrhizal association supports better plant growth promotion.
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De et al. (2024) studied this question.