Proposal of Crystallibacter gen. nov., Crystallibacter permensis sp. nov. and Crystallibacter degradans sp. nov. for the salt-tolerant and aromatics degrading actinobacteria, and reclassification of Arthrobacter crystallopoietes as Crystallibacter crystallifaciens comb. nov.

Four salt-tolerant and aromatics degrading strains used in this study were isolated from polluted technogenic soil on the territory of the Verkhnekamsk potash deposit (Russia). The strains were aerobic, Gram-stain-positive, non-motile, non-endospore-forming irregular rods, exhibiting a marked rod-coccus growth cycle. They contained lysine-based peptidoglycan, teichulosonic acid and poly(glycosyl phosphate) polymers in the cell walls.

New lactate- and pyruvate-containing polysaccharide and rhamnomannan with xylose residues from the cell wall of Rathayibacter oskolensis VKM Ac-2121.

The cell wall of endophytic strain Rathayibacter oskolensis VKM Ac-2121 (family Microbacteriaceae, class Actinomycetes) was found to contain neutral and acidic glycopolymers. The neutral polymer is a block-type rhamnomannan partially should be substitutied by xylose residues, [→2)-α-[β-D-Xylp-(1 → 3)]-D-Manp-(1 → 3)-α-D-Rhap-(1→] [→2)-α-D-Manp-(1 → 3)-α-D-Rhap-(1→]. The acidic polymer has branched chain, bearing lactate and pyruvate residues, →4)-α-D-[S-Lac-(2-3)-α-L-Rhap-(1 → 3)]-D-Manp-(1 → 3)-α-D-[4,6-R-Pyr]-D-Galp-(1 → 3)-β-D-Glcp-(1 →.

Auxin production and plant growth promotion by sp. nov. from the rhizoplane of leafless Seidenf. orchid.

The strains of the genus , with more than 150 species, inhabit diverse environments; plant-associated bacteria reveal their plant growth-promoting activities due to a number of beneficial characteristics. Through the performance of diverse techniques and methods, including isolation of a novel strain from the aerial roots of leafless epiphytic orchid, Seidenf., its morphological and biochemical characterization, chemotaxonomy, phylogenetic and genome analysis, as well as bioassays and estimation of its auxin production capacity, a novel strain of ET2 is described.

A highly branched novel galactofuranan in the cell wall of Clavibacter tesselarius VKM Ac-1406.

The structures of two cell wall glycopolymers were studied in the plant pathogenic bacterium Clavibacter tesselarius VKM Ac-1406 (family Microbacteriaceae, order Micrococcales, class Actinomycetes). The predominant polymer was a novel (1 → 6)-linked β-d-galactofuranan with a highly branched repeating unit, α-L-Rhap-(1 → 3)-α-D-Galp-(1 → 2)-[α-L-Rhap-(1 → 3)]-α-D-Fucp-(1 →, at O-2 on every second galactofuranose residue. The second polymer present in small amounts was acidic with the repeating unit, →3)-α-D-Galp-(1 → 3)-α-D-[4,6-S-Pyr]-Manp-(1 → 3)-α-D-Manp-[2OAc]-(1→, and was reported in all Clavibacter species investigated to date.

A novel cell wall galactofuranan in Clavibacter phaseoli VKM Ac-2641.

A glycopolymer of novel structure was found in the cell wall of plant pathogen Clavibacter phaseoli VKM Ac-2641 (family Microbacteriaceae, class Actinomycetes). The glycopolymer was (1 → 6)-linked β-d-galactofuranan with side branched trisaccharide, α-D-Manp-(1 → 2)-[α-D-Manp-(1 → 3)]-α-D-Ribf-(1→ at O-2 on every second galactofuranose residue. The galactofuranan structure was established by chemical and NMR spectroscopic methods using one- and two-dimensional techniques H,H COSY, TOCSY, ROESY and H,C HSQC, HMBC.