Abstract
Fungi were isolated from soil under several vegetational types by an enrichment technique with vanillin or p-hydroxybenzaldehyde as sole source of carbon. Although similar morphologically, the isolates obtained are classified in two separate groups, yeasts and hyphomycetes. A study was made of the growth in pure culture of representative species, namely, Pullularia pullulans, Margarinomyces heteromorpha and M. mutabilis on several aromatic compounds related to lignin.

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