Abstract
This chapter studies the genus Pseudozyma. In the determination of the asexual reproduction it is seen that yeast cells are variable in shape, fusoidal, ovoid, ellipsoidal, or somewhat cylindrical; hyphae occur, usually with retraction septa and with the cytoplasm retracted in cells separated by lysed cells; fusiform blastoconidia are formed on sterigma-like denticles and usually form an aerial mycelium made up of branched, acropetal chains of fusiform conidia; chlamydospores may be present; and ballistoconidia are absent. Sexual reproduction is unknown, but most likely many species of Pseudozyma represent anamorphic states of species belonging to Ustilaginales. The chapter also discusses physiology/biochemistry and phylogenetic placement of the genus. The type species accepted are Pseudozyma Antarctica, Pseudozyma aphidis, and so on. Key physiological characters of species in the genus Pseudozyma with Ustilago maydis as a reference are presented. In the systematic discussion of the species, synonyms, growth on 5% malt extract agar, growth on the surface of assimilation media (glucose), Dalmau plate culture on morphology agar, gene sequence accession numbers, type strain, cell carbohydrates, origin of the strains studied, systematics, ecology, and biotechnology are determined.
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