Chapter 117 - Kondoa Y. Yamada, Nakagawa & Banno emend. Á. Fonseca, Sampaio & Fell (2000)

Abstract

This chapter discusses the genus Kondoa. 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. In asexual reproduction yeast cells are formed by multilateral budding. Cells are globose, ovoid, ellipsoidal, or short-cylindrical. Pseudohyphae or true hyphae may be formed. Where known, septal pores in true hyphae are “simple” and uniperforate. Colonies on agar media are cream, pinkish-cream, or mauve, and old cultures may become more distinctly pink but never red or orange. In sexual reproduction basidiocarps are not produced and sexual structures form on agar media. In heterothallic species, cell–cell conjugation gives rise to true hyphae with clamp connections, whereas in homothallic species single cells give rise to true hyphae with incomplete clamp connections. Teliospores are not formed. Transversely septate (i.e., auricularioid) basidia arise directly on the hyphae. Single, forcibly discharged basidiospores (i.e., ballistospores) arise at the tip of sterigmata that form on basidial cells. Basidiospores germinate by budding. Multiple basidiospores (i.e., sporidia) may also form by budding on basidia. The genus Kondoa was erected to accommodate a single taxon, K. malvinella, which was transferred from the teliospore-forming genus Rhodosporidium on the basis of pronounced differences in partial SSU and LSU rRNA sequences with R. toruloides, the type species of the latter genus.