Factors affecting growth and phenolic pigment production by Alternaria alternata (Fr.) Keissler

The effect of factors such as composition of medium, pH, temperature and inoculation time on the amount of mycelial mass quantity and nature of phenolic pigments produced by the fungus Alternaria alternata (Fr.) Keissler has been studied. Alternaria alternata had maximum mycelial growth when the basal synthetic medium at pH 5.5, a temperature of 25° and incubation period of 12 days was used. The production of total phenolic pigment was maximum at temperature of 35° when the fungus was incubated for 9 days using basal synthetic medium. Addition of phenolic compouns such as tyrosine and gallic acid to the medium markedly increased the mycelial mass production but resulted in a suppression of phenolic pigment production of the fungus while salicylic acid, cinnamic acid and catechol completely suppressed the growth.

Abstract licence: CC BY

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