Comparative study of the degradative ability of autochthonous and standardized strains of wood decay fungi

IRG/WP 96-10178

F Llinares, D Muñoz-Mingarro, J E Garcia de los Rios, M T De Troya, M Yuste, F Rubio, F Alvarez, P Jiménez, C Rodríguez-Borrajo, A M Navarrete

This study is intended to assess the biomass, the extracellular protein production, and the carbohydrate degradating ability of three standarized (Chaetomium globosum, Trametes versicolor and Gloeophyllum trabeum) and six autochthonous wood decay fungi strains, with unknown degradating effects. The carbohydrate sources used were those that are usually found in wood cells (glucose, galactose, manose, arabino-galactan, xylan, pectin, cellulose, amylose). Media containing glucose dimethylsulfoxide and glucose-veratryl alcohol were also used as possible inducers of the production of ligninolitic enzimes. The results of the production of extracellular protein showed similar values, in both the autochthonous and the standarized strains, when arabino-galactan, pectin and cellulose were used as protein sources. The highest values in glucose dymethylsulfoxide and veratrilic glucose-alcohol were for Chaetomium globosum, although Pholiota aegerita in glucosedimethylsulfoxide and Lentinus edodes in veratrilic glucose alcohol do not show significant differences. In the production of reducting sugars, autochthonous strains present similar values to those shown by standarized strains. Such results would seem to indicate that most strains under survey belong to the groups of the fungi that cause mixed rot in wood.


Keywords: DECAY; FUNGI; CELLULASES; LIGNINASES; STRAINS; SPAIN

Conference: 96-05-19/24 Guadeloupe, France


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