Abstract
This chapter studies the genus Schizoblastosporion. It provides a systematic discussion of the species and concludes with comments on the genus. The diagnosis of the genus is done on the basis of asexual, sexual, physiology and biochemistry, and phylogenetic placement. Asexual reproduction is by bipolar budding in basipetal succession on a broad base. Fermentation is absent. Acetic acid is not produced. Nitrate is not assimilated. The diazonium blue B reaction is negative. Coenzyme Q-6 is produced. The anamorphic genus Schizoblastosporion exhibits bipolar budding in common with the anamorphic genus Kloeckera, as well as with the Teleomorphic genera Hanseniaspora, Nadsonia, Saccharomycodes, and Wickerhamia. Schizoblastosporion differs from other kloeckera by lack of fermentation and by absence of acetic acid production. Comparisons of D1/D2 LSU rRNA gene sequences have shown that S. starkeyi-henricii is an ananamorphic member of the Nadsonia clade. Kreger-vanRij and Veenhuis examined the process of bipolar budding in Schizoblastosporion and in species of Hanseniaspora, Nadsonia, Saccharomycodes, and Wickerhamia in a comparative electron microscopic study.
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