Microbial Decomposition of Synthetic 14C-Labeled Lignins in Nature: Lignin Biodegradation in a Variety of Natural Materials
AUTOR(ES)
Hackett, W. F.
RESUMO
Lignin biodegradation in a variety of natural materials was examined using specifically labeled synthetic 14C-lignins. Natural materials included soils, sediments, silage, steer bedding, and rumen contents. Both aerobic and anaerobic incubations were used. No 14C-labeled lignin biodegradation to labeled gaseous products under anaerobic conditions was observed. Aerobic 14C-labeled lignin mineralization varied with respect to type of natural material used, site, soil type and horizon, and temperature. The greatest observed degradation occurred in a soil from Yellowstone National Park and amounted to over 42% conversion of total radioactivity to 14CO2 during 78 days of incubation. Amounts of 14C-labeled lignin mineralization in Wisconsin soils and sediments were significantly correlated with organic carbon, organic nitrogen, nitrate nitrogen, exchangeable calcium, and exchangeable potassium.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=170572Documentos Relacionados
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