Acacia senegal and Prosopis chilensis-nodulating rhizobia Sinorhizobium arboris HAMBI 2361 and S. kostiense HAMBI 2362 produce tetra- and pentameric LCOs that are N-methylated, O-6-carbamoylated and partially sulfated.
Carbohydr Res
; 339(6): 1061-7, 2004 Apr 28.
Article
em En
| MEDLINE
| ID: mdl-15063192
Sinorhizobium arboris and S. kostiense are rhizobia that nodulate the tropical leguminous trees Acacia senegal and Prosopis chilensis. The lipochito-oligosaccharidic signalling molecules (LCOs) of S. arboris HAMBI 2361 and S. kostiense HAMBI 2362 were analyzed by mass spectrometry. The major LCOs produced by the strains were shown to be pentameric, acylated with common fatty acids, N-methylated, O-6-carbamoylated and partially sulfated, as are the LCOs characterized to date for other Acacia-nodulating rhizobia. Besides the major LCOs the two strains produced (i) tetrameric LCOs, (ii) LCOs acylated with fatty acids other than those commonly found, (iii) LCOs with only an acyl substituent and (iv) noncarbamoylated LCOs. Production of LCOs (i) to (iii) are novel among Acacia-nodulating rhizobia. The roles of the different structural characteristics of LCOs in the rhizobium-A. senegal symbiosis are discussed. Specific structural features of the LCOs are proposed to be important in the selection of effective nitrogen-fixing rhizobia by A. senegal.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Enxofre
/
Sinorhizobium
/
Prosopis
/
Acacia
Tipo de estudo:
Prognostic_studies
País/Região como assunto:
America do sul
/
Chile
Idioma:
En
Revista:
Carbohydr Res
Ano de publicação:
2004
Tipo de documento:
Article
País de afiliação:
Finlândia
País de publicação:
Holanda