Limited bacterial mineralization of fungal degradation intermediates from synthetic lignin.
The ability of selected bacterial strains and consortia to mineralize degradation intermediates produced by Phanerochaete chrysosporium from 14C-labeled synthetic lignins was studied. Three different molecular weight fractions of the intermediates were subjected to the action of the bacteria, which had been grown on a lignin-related dimeric compound. Two consortia isolated from wood being decayed naturally by a Ganoderma species of white rot fungus (the palo podrido system) mineralized 10 to 11% of the fraction with a molecular weight of approximately 500 but less than 4% of the higher- and lower-molecular-weight fractions. The consortia mineralized 5 to 9% of the original lignins. The ability of two pseudomonads isolated earlier from lignin-rich environments to mineralize the original lignins or fungus degradation products was much lower.
Rüttimann
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C
Laboratoria de Bioquimica, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago.
Vicuña
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R
Mozuch
M D
MD
Kirk
T K
TK
D001419:Bacteria / Q000378:metabolism*; D001487:Basidiomycota / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002245:Carbon Dioxide / Q000378:metabolism; D007700:Kinetics; D008031:Lignin / Q000138:chemical synthesis / Q000378:metabolism*; D008903:Minerals / Q000378:metabolism*
D008903:Minerals; D002245:Carbon Dioxide; D008031:Lignin