Biological Delignification of empty 14 C-Labeled Lignocelluloses by Basidiomycetes: Degradation and Solubilization of the Lignin and Cellulose Components
- 1 November 1982
- Vol. 74 (6) , 943-951
- https://doi.org/10.2307/3792724
Abstract
Three basidiomycetes, NRRL 6464, Pleurotus ostreatus and Phanerochaete chrysosporium, were evaluated for their ability to solubilize and metabolize to CO2 differentially 14C-labeled, naturally complexed lignocellulosics (LC). The fungi were grown on 14C-lignin (L*C) or 14C-glucan (LC*) substrates for 20 days at 26.degree. C. Several nutrient N levels were employed to determine if this variable could influence these fungi to preferentially degrade the lignin or glucan component of LC. P. ostreatus and P. chrysosporium degraded 20% of the L*C component, whereas NRRL 6464 converted 40% of the 14C-lignin component to 14CO2 at 2 mM N or less. At 20 mM, N, lignin degradation was suppressed 15 and 60% for P. ostreatus and P. chrysosporium, respectively, after 20 days growth. NRRL 6464 was relatively unaffected by the N levels. With all 3 fungi, increasing levels of N yielded progressively higher 14CO2 evolution from the LC* substrates.This publication has 0 references indexed in Scilit: