The biochemistry and immunology of yeasts that produce true mycelia: Ambrosiozyma, Hormoascus, and Hyphopichia.

Publisher Website
Google Scholar
Abstract
Ambrosiozyma, yeasts that produce true mycelia with transverse septa that communicate by a dolipore type septum, are compared with Hyphopichia and Hormoascus. This study includes intracellular oxidases, nitrite and nitrate reductases, guanine plus cytosine content in DNA (GC-content), cytochrome spectra (a + a3, b, c), coenzyme Q, and serological comparison by immunodiffusion and immunoelectrophoresis, with A. monospora and Hormoascus platypodis as references. The results support the division of the genus Ambrosiozyma into 2 groups based upon GC content, vitamin requirements, and serological homologies. Affinities btweeen Hormoascus platypodis and A. philentoma (vitamin requirements, intracellular nitrite and nitrate reductases, .beta.-galactosidase, serological homology, cytochrome spectra, and GC content) leads to the placing of Hormoascus platypodis in synonymy with Ambrosiozyma philentoma. Ambrosiozyma ambrosiae is compared with the other Ambrosiozyma and with the non-fermentative Picia, and Hansenula silvicola. Tyhese comparisons show that A. ambrosiae has more affinity with the other Ambrosiozyma than with Pichia or Hansenula. Hyphopichia burtonii differs from the other species in regard to vitamin requirements, coenzyme Q8, .alpha.2 band of cytochrome c and serological homologies.