<i>Chondrostereum purpureum</i> Isolates Collected for Phase 1.

All C. purpureum strains were isolated from fruiting bodies on birch stumps (Betula pendula and B. pubescens) in Finland and were heterokaryotic. The two best strains in the laccase activity test are in bold. a 0: No color reaction, i.e., low laccase activity; 1: slight color reaction; 2: intermediate color reaction; 3: strong color reaction, i.e., high laccase activity on Petri plates. Chondrostereum purpureum Isolates Collected for Phase 1.