Evaluation of Alternaria alternata Isolates for Metabolite Production Isolated from Different Sites of Varanasi, India

Twelve isolates of Alternaria alternata were isolated from various vegetable crops grown in different locations of Varanasi. There colony and conidial morphology on culture medium exhibited complete resemblance with Alternaria alternata. Each isolate was found positive for the production of a secondary metabolite in liquid medium. TLC and HPLC analysis further confirmed the presence of secondary metabolites in the samples prepared from the culture filtrate of different isolates.