Abstract
Investigation of yeasts from Antarctic regions revealed that certain species ofCandida have heterobasidiomycetous life cycles. Two distinct but overlapping groups of species were found: heterothallic and self-sporulating species.Candida scottii is a heterothallic species with the following life cycle: opposite mating types will conjugate and develop a dikaryotic mycelium with clamp connections. Karyogamy occurs in the teliospore which germinates and produces a promycelium. Meiosis takes place in the promycelium, followed by development of haploid sporidia to complete the life cycle. In addition,C. scottii has a self-sporulating phase. From a single cell, in the apparent absence of mating, a uninucleate mycelium is produced that lacks clamp connections. Teliospores, promycelia and sporidia develop that appear similar to those produced from dikaryotic mycelium.
The self-sporulating species have life histories similar to the self-sporulating phase ofC. scottii; except that heterothallism has not been observed.
Based on these life histories the new genusLeucosporidium is proposed with two heterothallic species (Leu. scottii andLeu. capsuligenum) and five self-sporulating species (Leu. antarcticum, Leu. frigidum, Leu. gelidum, Leu. nivalis andLeu. stokesii. Leu. antarcticum) andLeu. stokesii have not been described under the genusCandida.
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Contribution No. 1138 from the Institute of Marine Sciences, University of Miami, Fla.
This study was supported by the National Science Foundation through the Office of Antarctic Programs, Grant GA-3957. The authors are grateful to Dr. E. Marelli for editing the Latin diagnosis.
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Fell, J.W., Statzell, A.C., Hunter, I.L. et al. Leucosporidium gen. n., the heterobasidiomycetous stage of several yeasts of the genusCandida . Antonie van Leeuwenhoek 35, 433–462 (1969). https://doi.org/10.1007/BF02219163
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DOI: https://doi.org/10.1007/BF02219163