Growth of Aureobasidium pullulans on ball-milled Aspen

Aureobasidium pullulans (de Barry) Arnaud, an ubiquitous fungus normally found associated with pectin-containing substances, is known to cause blue or black discolorations in wood structures in Europe and has been grouped with the blueing fungi . In eastern Canada it colonizes exposed wood surfaces and contributes to weathering. It often discolors paint surfaces or varnish coatings and in some cases contributes to their complete failure. Generally this fungus is considered a secondary organism metabolizing only simpler terminal compounds. The polymorphic nature of the organism under certain growth conditions is demonstrated by the occurrence of yeast-like forms and other variations including filamentous form