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1. (Article ID: 1611)
 
Fedonenko YP, Borisov IV, Konnova ON, Zdorovenko EL, Katsy SA, Konnova SA, Ignatov VV
Determination of the structure of the repeated unit of the Azospirillum brasilense SR75 O-specific polysaccharide and homology of the lps loci in the plasmids of Azospirillum brasilense strains SR75 and Sp245
Mikrobiologiia = Microbiology [Russian] 74(5) (2005) 626-632
 

The structural identity of the repeated unit in O-specific polysaccharides (OPSs) present in the outer membrane of strain SR75 of the bacterium Azospirillum brasilense, isolated from wheat rhizosphere in Saratov oblast, and the OPSs of previously studied A. brasilense strain Sp245, isolated from surface-sterilized wheat roots in Brazil, has been demonstrated. Plasmid profiles, DNA restriction, and hybridization assays suggested that A. brasilense strains SR75 and Sp245 have different genomic structures. It was shown that homologous lps loci of both strains was localized in their plasmid DNA. This fact allows us to state that, despite their different origin, the development of the strains studied was convergent. Presumably, the habitation of these bacteria in similar ecological niches influenced this process in many respects

LPS, structure, DNA, strain, structural, polysaccharide, determination, bacteria, O-specific, O-specific polysaccharide, Azospirillum brasilense, polysaccharides, plasmid, O-specific polysaccharides, homology, membrane, outer membrane, root, assay, origin, Plasmids, homologous, development, Azospirillum, P, profile, restriction, ecological, rhizosphere, wheat

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2. (Article ID: 4844)
 
Fedonenko YP, Sigida EN, Konnova SA, Ignatov VV
Structure and serology of O-antigens of nitrogen-fixing rhizobacteria of the genus Azospirillum
Russian Chemical Bulletin = Izvestiia Akademii nauk. Seriia khimicheskaia 64(5) (2015) 1024-1031
 

The review presents a discussion of the published data of 2002 to 2014 dealing with structural studies of O-specific polysaccharides, representatives of the Azospirillum diazotrophic rhizobacteria, summarizing the results of a series of authors? studies. Some general structures incorporated in O-specific polysaccharides responsible for classification of bacterial cultures into serogroups on the basis of immunochemical studies were characterized. The structures of O-specific polysaccharides of seven azospirillum strains identical to those of previously studied strains are presented in this review for the first time.

lipopolysaccharides, O-specific polysaccharides, Structures, Azospirillum, O-antigenic determinants

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