| Abstract | Yeasts were isolated from soils from citrus orchards and citrus waste disposal areas in California and Florida. Species of Trichosporon, Cryptococcus, and Rhoclotorula were predominant. Strains of Hansenula saturnus, Hansenula californica, Hansenula mrakii, Pichia kluyveri, Saccharomyces rosei, Saccharomyces cerevisiae, and some species of Candida and Torulopsis were also found. The cultures isolated were tested for the ability to use a number of flavonoids. These compounds were used by strains of Trichosporon cutaneum, Cryptococcus albidus and its variety diffluens, Cryptococcus terreus, Cryptococcus lanrentii, Rhodotorula glutinis, Rhodotorula minuta, Rhodotorula rubra, and Candida humicola, but not by the ascosporogenous species or the other Candida species. Contrary to expectations, most of the cultures which used flavonoids were isolated from the orchard soils rather than from the soils of the waste disposal areas. |
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