Numerical Taxonomy of Various Genera of Yeasts

The taxonomy of Streptomyces and related genera.

The streptomycetes, producers of more than half of the 10,000 documented bioactive compounds, have offered over 50 years of interest to industry and academia. Despite this, their taxonomy remains somewhat confused and the definition of species is unresolved due to the variety of morphological, cultural, physiological and biochemical characteristics that are observed at both the inter- and the i...

Deoxyribonucleic acid base composition and numerical taxonomy of yeasts in the genus Trichosporon.

Numerical taxonomy of the genus Glycyrrhiza in the Hyrcanian region

Noticeable variation was observed in a number of morphological characters in the Glycyrrhiza specimens in various habitats in north of Iran. To study these variations, two taxa related to the Hyrcanian region from all four known taxa of this genus in Iran, including Glycyrrhiza echinata, and G. glabra var. glabra were studied by numerical taxonomy using morphological characters in three provinc...

Assimilation of melezitose among various industrial yeasts

When we performed melezitose assimilation test in industrial yeasts, most sake yeasts failed to assimilate melezitose, while the other industrial yeasts could. We therefore tried to elucidate differences for melezitose assimilation among industrial yeasts. Results showed industrial yeasts had no melezitose resolving power on the cell surface, but had this in the cell. Also, the sake yeasts had ...

On monospecific genera in prokaryotic taxonomy

A monospecific genus contains a single species ever since it was proposed. Though formally more than half of the known prokaryotic genera are monospecific, we pick up those which actually raise taxonomic problems by violating monophyly of the taxon within which it resides. Taking monophyly as a guiding principle, our arguments are based on simultaneous support from 16S rRNA sequence analysis an...