Identification of citrinin as the defence metabolite of Penicillium corylophilum stressed with the antagonist fungus Beauveria bassiana.

Penicillium corylophilum isolated from mosquitoes was cultivated in liquid media leading to the first reported identification of citrinin (1a) as one metabolic component of this fungus. The produced amount of 1a indicated this compound as the most abundant secondary metabolite of this fungus. Stressing the culture of P.