Seasonal Fluctuation of AM fungi on two hydrocarbon yielding plant species of Jatropha

Seasonal fluctuation of AM fungal colonization and spore count on two hydrocarbon yielding plants revealed, that the soil type and physico-chemical features of the soil do not play a role in distribution of spores in selected 12 sites. However, the higher spore number was determined during summer in both Jatropha curcas L. and Jatropha gossypifolia L. and per cent root colonization was significantly higher in rainy season. The spore population was moderately low in rainy season in Jatropa gossypifolia L. and Jatropha curcas L. AM fungi belonging to genera Glomus, Gigaspora, Acaulospora, Sclerocystis and Scutellospora were isolated in Dharwad district soils. During the study period Glomus was dominated over other remaining four genera. The ecological and edaphic characteristics have been discussed with respect to spore distribution and root colonization.