AI Article Synopsis
- Two new species of actinomycetes, Rathayibacter caricis and Rathayibacter festucae, were discovered in specific environments associated with the plants Carex sp. and Festuca rubra.
- These species are classified within the genus Rathayibacter and show distinct chemotaxonomic and phenotypic characteristics compared to existing species.
- Rathayibacter caricis is unique for its fucose-containing cell wall, while Rathayibacter festucae is identifiable by its rose-orange colony color.
Article Abstract
Two novel species, Rathayibacter caricis sp. nov. (type strain VKM Ac-1799T = UCM Ac-618T) and Rathayibacter festucae sp. nov. (type strain VKM Ac-1390T UCM Ac-619T), are proposed for two coryneform actinomycetes found in the phyllosphere of Carex sp. and in the leaf gall induced by the plant-parasitic nematode Anguina graminis on Festuca rubra L., respectively. The strains of the novel species are typical of the genus Rathayibacter in their chemotaxonomic characteristics and fall into the Rathayibacter 16S rDNA phylogenetic cluster. They belong to two separate genomic species and differ markedly from current validly described species of Rathayibacter at the phenotypic level. The most striking feature differentiating Rathayibacter caricis sp. nov. from other species of the genus is the presence of fucose in its cell wall and Rathayibacter festucae sp. nov. can be easily recognized among other yellow-pigmented rathayibacters because of its rose-orange-coloured colonies.
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| http://dx.doi.org/10.1099/00207713-52-6-1917 | DOI Listing |
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D-rhamnan and teichuronic acid from the cell wall of Rathayibacter caricis VKM Ac-1799.
Carbohydr Res
January 2021
All-Russian Collection of Microorganisms (VKM), G.K. Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russian Federation.
The cell wall of Rathayibacter caricis VKM Ac-1799 (family Microbacteriaceae, class Actinobacteria) was found to contain both neutral and acidic glycopolymers. The first one is D-rhamnopyranan with main chain →2)-α-D-Rhap-(1 → 3)-α-D-Rhap-(1→, where a part of 2-substituted residues bears as a side-chain at position 3 α-D-Manp residues or disaccharides α-D-Araf-(1→2)-α-D-Manp-(1 → . The second polymer is a teichuronic acid with a branched repeating units composed of seven monosaccharides →4)-α-[β-D-Manp-(1 → 3)]-D-Glcp-(1 → 4)-β-D-GlcpA-(1 → 2)-β-[4,6Pyr]-D-Manp-(1 → 4)-β-L-Rhap-(1 → 4)-β-D-Glcp-(1 → 4)-β-D-Glcp-(1 → .
View Article and Find Full Text PDFArticle Synopsis
- Two new species of actinomycetes, Rathayibacter caricis and Rathayibacter festucae, were discovered in specific environments associated with the plants Carex sp. and Festuca rubra.
- These species are classified within the genus Rathayibacter and show distinct chemotaxonomic and phenotypic characteristics compared to existing species.
- Rathayibacter caricis is unique for its fucose-containing cell wall, while Rathayibacter festucae is identifiable by its rose-orange colony color.
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