Biotransformation of sodium lignosulfonates of different molecular weights by the fungus Pleurotus ostreatus.
Fractions of sodium lignosulfonates (NaLS) of varied molecular weight, obtained by gel-permeation chromatography on Sephadex G-50, were exposed to microbiological degradation using liquid cultures of Pleurotus ostreatus. The intensity of transformation observed during 4 weeks of growth (based on nitroso determinations) was inversely proportional to the molecular weight of the fractions studied. Degradation of lignosulfonates was accompanied by polymerization, particularly where low molecular weight fractions were involved. The activity of p-diphenol oxidase (laccase) was stimulated by the presence of lignosulfonates. This effect was especially noticeable in the case of high molecular weight components.
D000363:Agaricales / Q000378:metabolism*; D001711:Biotransformation; D042845:Laccase; D008031:Lignin / Q000031:analogs & derivatives* / Q000378:metabolism; D008970:Molecular Weight; D010088:Oxidoreductases / Q000378:metabolism; D011108:Polymers
D011108:Polymers; C001545:lignosulfuric acid; D008031:Lignin; D010088:Oxidoreductases; D042845:Laccase