Classification of thermophilic streptomycetes, including the description of Streptomyces thermoalcalitolerans sp. nov.

Streptomyces malaysiensis sp. nov., a new streptomycete species with rugose, ornamented spores

“…Manfio (1995) also found that representatives of the four validly described species can be distinguished from members of all of the other streptomycete taxa circumscribed in the numerical phenetic survey of Williams et al (1983) by means of a combination of phenotypic properties. These observations are in line with those from recent studies, which show that differential phenotypic properties, notably morphological and pigmentation features, highlighted in numerical phenetic studies can be reliably weighted for the differentiation of closely related streptomycete species (Kim et al, 1998(Kim et al, , 1999. The genotypic and phenotypic data show that strain ATB-1 lT forms a new centre of taxonomic variation within the genus Streptomyces.…”

“…Members of this genus are now known to share many phenotypic characteristics and to constitute a distinct phyletic line, and they are currently assigned to over 450 validly described species Embley & Stackebrandt, 1994;Goodfellow et al, 1997). It is also clear that minimal standards for the description of Streptomyces species need to be based on a judicious selection of genotypic and phenotypic properties Chun et al, 1997b;Labeda et al, 1997;Kim et al, 1996Kim et al, , 1998Kim et al, , 1999. Streptomycetes continue to be a rich source of novel bioactive compounds, including antibiotics, antitumour agents and enzymes (Berdy, 1995;Chun et al, 1997b;Labeda et al, 1997).…”

Streptomyces mexicanus sp. nov., a xylanolytic micro-organism isolated from soil

“…These values correspond to 11-20 nt differences out of 1450 nt positions. Nucleotide similarity values within this range have been reported for several described species of Streptomyces (Kim et al, , 2000 which can be separated from each other on the basis of DNA relatedness data and phenotypic properties (Goodfellow et al, 1987;Kim et al, 1999Kim et al, , 2000. A fuller phylogenetic tree showing the placement of strain CH-M-1035…”

“…Agar discs (8 mm) positive. Data for strain CH-M-1035 T are from this study; data for all other strains are from Kim, B. et al (1999Kim, B. et al ( , 2000. …”

“…These micro-organisms grow well at 50˚C , and can be distinguished from mesophilic streptomycetes on the basis of numerical phenotypic analyses (Goodfellow et al, 1987;O'Donnell et al, 1993). However, the thermophilic streptomycetes fall into distinct evolutionary clades, upon analyses based on 16S rDNA sequence data (Kim, D. et al, 1996;Kim, S. B. et al, 1998;Kim, B. et al, 1999).…”