DIVERSITY OF ARBUSCULAR MYCORRHIZAL FUNGI IN THE RHIZOSPHERE SOILS OF FOUR AGROFORESTRY TREE SPECIES OF NORTH TELANGANAANUSHA DUVVA, DAYAKAR GOVINDU, SHARAT BELLAMKONDA AND SRINIVAS PODETIAbstract The present study is to investigate the abundance of AM fungal spores in different soils. Rhizosphere soil samples were collected from different locations and were examined to analyze the distribution of AMF. The root colonization and spore population were influenced by a wide range of environmental factors, which have the influence on host plants. Rhizosphere soil samples were collected along with young tender roots of four agroforestry tree species (Albizia lebbeck, Acacia nilotica, Azadirachta indica and Tamarindus indica). The AM fungal spores were extracted from rhizosphere soils and percentage of root colonization was analysed. The highest spore abundance was observed in Eturunagaram rhizosphere soils of Albizia lebbeck and least was found in Vikarabad soils of Tamarindus indica. Percentage of root colonization was recorded lowest in Vikarabad soils of Azadirachta indica and Tamarindus indica. On the other hand, Gigaspora, Scutellospora and Acaulospora were least in the soils of Bayyaram and Chikapelly. AMF species belonging to five genera (Glomus, Acaulospora, Gigaspora, Sclerocystis and Scutellospora) were identified. In all the rhizosphere soil samples the Glomus species was dominant followed by Gigaspora and Acaulopsora.
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