The growth and conidiation of the aged Trichoderma viride culture grown in the dark, and after an induction by a light pulse, was examined in the presence of selected mono-, di(tri)saccharides, amino acids and alcohols as sole carbon sources. Hexoses and disaccharides, but not pentoses and amino acids, promoted proportionally both growth and conidiation induced by aging or light. All compounds but pentoses promoted the conidiation in aged cultures and photoconidiation in a close correlation. Ethanol, glycerol and ethylene glycol supported both growth and conidiation but these processes were not supported equally. Conidia formation with hexoses and amino acids as sole carbon sources seems to be a function of growth promotion, rather than of growth restriction (starvation, stress, aging). With glucose as sole carbon source the conidiation was not triggered by nutrient limitation, nor by the accumulation of waste metabolites. The aging-induced conidiation can be considered to be triggered by the genetic program of the microorganism rather than by its nutrient status.

Department of Biochemistry and Microbiology Slovak University of Technology 812 37 Bratislava Slovakia

See more in PubMed

Nucleic Acids Res. 1991 Dec 25;19(24):6883-6 PubMed

J Gen Microbiol. 1991 Nov;137(11):2605-9 PubMed

Genes Dev. 1992 Jun;6(6):1052-7 PubMed

Can J Microbiol. 1969 Jul;15(7):703-6 PubMed

Folia Microbiol (Praha). 1978;23(6):460-4 PubMed

Dev Biol. 1991 Nov;148(1):117-28 PubMed

FEBS Lett. 1989 May 8;248(1-2):185-7 PubMed

Benomyl-resistant mutant strain of Trichoderma sp. with increased mycoparasitic activity