DEPOLYMERIZATION OF CELLULOSE BY LOW MOLECULAR WEIGHT COMPOUNDS FROM BROWN-ROT FUNGI
褐腐真菌产生的低分子化合物对纤维素的解聚作用研究

Eight strains incuding Pleurotus ostreatus, Gloeophyllum trabeum and Lentinus lepideus were selected for degradation of filter paper.In initial incubation,fungal degradation of cellulose was characterized by the rapid decrease of polymerization and little weight loss of cellulose. Besides that, the filter.paper activities were not detected . All the tested strains had Fe3+-chelating ability and produced hydroxyl radical. Extracellular compounds of Gloeophllum trabeum were partially purified on Sephadex LH-20 and a fraction with low molecular weight was obtained. This fiaction could oxidize Cellulose and break it into short fibrils which resulted in the great reduction of cellulose polymerization degree.