Seasonality of endophytic fungi: reasoning of medicinal use

Vinu A.K and M.Jayashankar

A total of ten medicinal herb species were selected from different sacred grooves of MadikeriTaluk, Kodagu for the present study. Among the identified cultures, species of Penicillium, Cladosporium, Chaetomium, Curvularia, Aureobasidium were found to be dominant in specific hosts. Penicillium sp., was found more than one host revealing its wide range of host specificity. Among the herb species, the colonization frequency (CF %) of dominant endophytic fungi ranged from a minimum (17.1100%) of Peniciliumitalicum in Solanumnigrum to a maximum (43.5533%) of Penicilliumchrysogenum in Centella asiatica during the monsoon season. The colonization frequency (CF%) of dominant endophytic fungi irrespective of host was found to be higher during monsoon (29.6633%), least in summer (12.7747%) and moderate in winter (23.3280%).The Shannon diversity index (H”) showed maximum diversity during rainy season (H”2.26) and the least diversity was observed in winter (H”2.241). Maximum evenness was found in monsoon 0.9584 and least in winter. According to Simpson's diversity index, species abundance was high in monsoon (I/D=0.8912) and low in summer (0.8872).

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