Abstract
This chapter studies the genus Ogataea. In the determination of the asexual reproduction, it is seen that cell division is by multilateral budding on a narrow base, and budded cells are spherical to ellipsoidal. Pseudohyphae, if formed, consist of a few elongated cells; true hyphae are not formed. In sexual reproduction it is found that asci are deliquescent and may be unconjugated or show conjugation between a cell and its bud or between independent cells. Asci produce one to four, or infrequently more, ascospores that may be hat-shaped, allantoid, or spherical with a ledge. Species are homothallic or infrequently heterothallic. The chapter also discusses physiology/biochemistry and phylogenetic placement of the genus. The type species taken is Ogataea minuta. The key characters of species assigned to the genus Ogataea are presented. In the systematic discussion of the species, growth in 5% malt extract broth, growth on 5% malt extract agar, growth on the surface of 5% malt extract, Dalmau plate culture on corn meal agar, formation of ascospores, gene sequence accession number, type strain, origin of the strains studied, systematics, and ecology are determined.
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