Fig. 3. Syringol (S) oxidation catalyzed by Agrocybe pediades (AH 40210) (white-rot humus basidiomycete) grown on MEA plate. Syringol was added alone (S) and in the
presence of hydrogen peroxide (S + H2O2) or catalase (S + catalase). The above three reactions were initiated at the same time and were tested in a single plate, first in front of
(A) and then within (B) the limits of the fungal colony, in the following order: (i) a1 and then a2 (in front of the edge of the colony); and (ii) b (within the colony). a2 reactions
were initiated with a 10 min delay with respect to the a1 onset and both were developed 5 min later. Syringol oxidation in a1 and a2 was faster in the presence of hydrogen
peroxide and slower in the presence of catalase. The a1 and a2 reactions are saturated in (B).