Abstract
Occurrence of the VA-mycorrhizal symbiosis in forest trees has been evaluated in 46 species selected for biomass energy plantation at Raipur. Seedlings were raised in nursery using both the nursery bed and polypot methods having vertisol type of the indigenous soil. Roots of the seedlings were examined for VAM colonization after 150-180 days of growth. Out of the 46 speceis tested all but Schrebera Swietenioides had the VAM colonization on their roots. It was found that the VAM colonization varied in % colonization from species to species which ranged from the least of 10% to the highest of 94% in Schleichera oleosa and Cassia fistula respectively. Occurrence of the VAM symbiosis in plants belonging to many families are well distributed in the tropical forest of India. The VAM fungi associated with these tree species mainly belonged to the species of Glomus, Acaulospora and Gigaspora.
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