Abstract
Three types of structure of the ascospore wall were found among the haploid Saccharomyces species examined: a warty wall (S. rouxii), a smooth wall with a single electron-light inner layer (S. bailii) and a smooth wall with a double light inner layer (S. montanus, S. florentinus). The latter type also occurred in Kluyveromyces thermotolerans and K. waltii. In K. fragilis spores the wall had a single light inner layer. The taxonomic implications of these findings were discussed.
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Kreger-van Rij, N.J.W. A comparative ultrastructural study of the ascospores of some Saccharomyces and Kluyveromyces species. Arch. Microbiol. 121, 53–59 (1979). https://doi.org/10.1007/BF00409205
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DOI: https://doi.org/10.1007/BF00409205