Diazotrophic bacteria of the genus Azospirillum are known widely, because they are ubiquitous in the rhizosphere and can promote the growth and performance of nonlegume plants. Recently, more Azospirillum species have been isolated from sources other than plants or soil. We report the structures of the O polysaccharides (OPSs) from the lipopolysaccharides of the type strains A. thiophilum BV-ST (1) and A. griseum L-25-5w-1T (2), isolated from aquatic environments. Both structures have a common tetrarhamnan in the repeating-unit, which is decorated with a side xylose in the OPS of A. thiophilum BV-ST

Lipopolysaccharide, O polysaccharide, bacterial polysaccharide structure, Azospirillum griseum, Azospirillum thiophilum

• Compound ID: 16753
  

  a-D-Xylp-(1-2)-+ | -3)-a-L-Rhap-(1-2)-a-L-Rhap-(1-2)-a-L-Rhap-(1-3)-a-L-Rhap-(1-

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  Structure type: polymer chemical repeating unit
  Compound class: O-polysaccharide, polysaccharide
  
   
  
  Azospirillum thiophilum BV-ST
  CSDB ID 15647 (all data & tools)
• Compound ID: 1445
  

  -2)-a-L-Rhap-(1-3)-a-L-Rhap-(1-3)-a-L-Rhap-(1-2)-a-L-Rhap-(1-

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  Structure type: polymer chemical repeating unit
  Trivial name: L-rhamnan, water-soluble EPS
  Compound class: EPS, O-polysaccharide, O-antigen, polysaccharide, rhamnan
  Reference(s) to other database(s): GTC:G60116ZJ, GlycomeDB:27349
  
   
  
  Azospirillum griseum L-25-5w-1T
  CSDB ID 15648 (all data & tools)