STUDIES ON THE CLASSIFICATION OF STREPTOMYCETES, PART XIII THE MICROSCOPIC MORPHOLOGY AND OTHER CHARACTERISTICS OF WHORL FORMING STRAINS

Abstract

The whorl forming strains have long straight or long wavy axial aerial mycelia which branch repeatedly in monopodial alternate, opposite and verticillate forms, and occasionally diverge from a filament into two or three branches. The long axial aerial mycelium does not break into spores, but gives rise to short side branches which grow in verticils and form whorls. The typical whorl is "Biverticils", namely compound verticils consisting of primary and secondary elements. And there are sometimes atypical whorls in some unfavourable cultural condition or in some strains. Atypical whorls contain "Monoverticils" consisting of only primary verticils, mixed verticils of mono- and bi-verticils and sometimes various more compound polyverticils.
The terminal hyphae of whorl are short straight or a little wavy in shape and break into spores.
The whorl forming strains employed have no spirals.
The description of each strain employed was also given.