Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 1 Issue 3-4, 1999; Page No.(191-194 )

PRODUCTION OF LIGNINOLYTIC ENZYMES BY IMPERFECT FUNGI AND YEAST INDUCED BY CULTURE ADDITIVES

A.A. SAFARI SINEGANI, G. EMTIAZI AND S. HAJRASULIHA

Abstract

Production of lignin-degrading enzymes by the imperfect fungi Aspergillus terreus and Trichoderma reesei and the yeast in the N-ethyl aniline, N, N-dimethyl aniline, benzyl alcohol, and benzaldehyde treated liquid culture media were assessed. Manganese-dependent peroxidase (MnP), lignin peroxidase (LiP) and laccase were produced more or less in all culture media of fungi, but the LiP activities of the imperfect fungi were negligible. In contrast to low biomass of the yeast, the MnP and Lip activities of this fungus were much higher than (1.8 and 3 times respectively) of the deutromycetes A. tereus, and T. rerrsei. Among the fungi A. terreus reduced pH of its' culture media significantly, grew very well and had the highest biomass. Laccase activity of A. terreus was higher than 2 and 1.35 time of T. terreus and the yeast respectively. All of the fungi had the highest MnP and LIP activities and biomasses in the benzaldehyde treated media. In contrast to it, MnP and LIP activities and fungal biomasses were significantly low in the N, N-dimethyl aniline treated media. Laccase activities in the N, N-dimethyl aniline treated media were also how, but in the N-ethyl aniline and benzyl alcohol were considerably high.

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