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The taxonomy of yeasts found in exudates of certain trees and other natural breeding sites of some species of Drosophila



The taxonomy of yeasts found in exudates of certain trees and other natural breeding sites of some species of Drosophila



Antonie van Leeuwenhoek 22(2): 117-130



A survey was made of the yeasts occurring in slime fluxes of Quercus kellogii (black oak), Abies concolor (red fir) and in certain mushrooms and dead logs in the mountains of the Yosemite regionof California. Most of the 134 isolates identified were found to be non-fermentative or poorly fermentative (fermenting glucose only and usually weakly). The isolates are placed in the following genera: Pichia (34), Debaryomyces (35), imperfect forms of Hansenula (39), Endomyces (3), Saccharomyces (2), Candida (11), Trichosporon (7), Torulopsis (1), Cryptococcus (1) and Sporo-bolomyces (1). Four new spp. are described: Pichia silvestris, P quercibus, P carsonii and Debaryomyces fluxorum, P. quercibus and P. carsonii are unusual representatives of the genus in that they form a very primitive pseudomycelium and lack pellicle on malt extract. To accommodate such spp., an emended diagnosis of the genus Pichia is proposed by Phaff in an accompanying paper. Saccharomyces pastori guillermond, of which 12 isolates were obtained, has been transferred to the emended genus Pichia as P pastori.

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Accession: 025952543

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PMID: 13340698



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