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Spectrophotometric analyses of some Candida species and related yeasts: significance in taxonomy

, : Spectrophotometric analyses of some Candida species and related yeasts: significance in taxonomy. Cellular and Molecular Biology 33(3): 313-323

Spectrophotometric analyses of whole-cell pastes were carried out with twelve species among the yeast genera Candida, Saccharomyces and Kluyveromyces. With the exception of C. intermedia, the species of the pseudotropicalis group showed strong similitudes in their low temperature cytochrome absorption spectra; in addition, the two species of each assumed pair of perfect and imperfect yeasts K. marxianus/C. macedoniensis and K. fragilis/C. pseudotropicalis were practically indistinguishable and considered as representative of the same taxon: K. marxianus/C. kefyr. In the "glabrata" group, C. glabrata appeared clearly as a distinct species; C. bovina and its assumed perfect form S. telluris were quite comparable in their cytochrome absorption spectra, while C. slooffii was considered as a variety of C. pintolopesii. Cytochrome profile of S. cerevisiae, and representative species of the "robusta" group, was distinct from those of the "pseudotropicalis" and "glabrata" groups, thus pointing out the suggested heterogeneity of the imperfect genus Candida. These data, in agreement with those obtained by other molecular approaches confirm the significance of low temperature absorption spectra of cytochrome in yeast taxonomy.

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