Abstract
Decay capacity of 14 strains of the brown-rot fungus Postia (≡Poria) placenta was determined using soil-wood block tests. One monokaryotic isolate, ME20, was identified as being unable to degrade wood. It retained the ability to produce extracellular carbohydrate-degrading enzymes, although levels of glycosidases and carboxymethylcellulase were atypical under certain cultural conditions. The electrophoretic protein profile of this isolate varied from degradative strains. It produced H2O2 and oxalic acid under a variety of carbon and nitrogen regimes and did not contain double-stranded RNA. An understanding of the physiology of this isolate would further our knowledge of decay mechanisms leading to safer preservation protocols.
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