Abstract
Marasmius quercophilus is a white-rot fungus producing laccase, a polyphenoloxidase involved in lignin degradation. The 17 strains under study were isolated from an evergreen oak litter (La Gardiole-de-Rians, Var, France). All the isolates synthesised the same constitutive laccase. Copper and various aromatic compounds in the medium enhanced laccase activity to different degrees. A copper concentration of 5 mg L 1 seemed to be the optimal tested. Coniferyl alcohol appeared to have the most extensive inducing potential. Each aromatic compound induced different new isoenzymatic forms in the electrophoretic patterns. These isoenzymes were similar for every strain.
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