| Abstract: | Thalli of Armillaria mellea grew vigorously and produced abundant rhizomorph after 21 days of incubation on a glucose-L-asparagine medium supplemented with auxin, but grew poorly and failed to produce rhizomorphs on a non-supplemented medium or on one supplemented with either gibberellic acid or kinetin. Replacement of glucose in auxin-supplemented medium with arabinose, fructose, galactose, maltose, sucrose or starch resulted in poor thallus growth and a lack of rhizomorph development. The superiority of glucose as a carbon source for thallus growth appears to be related to its superiority as a substrate for metabolism by A. mellea. |
