PRODUCTION OF LIGNINOLYTIC ENZYMES BY IMPERFECT FUNGI AND YEAST INDUCED BY CULTURE ADDITIVESA.A. SAFARI SINEGANI, G. EMTIAZI AND S. HAJRASULIHA
Production of lignin-degrading enzymes by the imperfect fungi Aspergillus terreus and Trichoderrna 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) deutromycetes A. tereus, and T. rerrsei. Among fungi A. teereus reduced pH media significantly, grew very well and had the highest biomass. Laccase activities of A. terreus were higher than 2 and 1.35 time of T. reesei and the yeast respectively. All of the fungi had the maximum MnP and LiP activities and biomass in the benzaldehyde treated media. In contrast to it, the 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 low, but in the N-ethyl aniline and benzyl alcohol were considerably high.
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