This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Vázquez, M
Right arrow Articles by Quinto, C
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Vázquez, M
Right arrow Articles by Quinto, C

 Previous Article  |  Next Article 

J Bacteriol. 1991 February; 173(3): 1250-1258

research-article

Novel organization of the common nodulation genes in Rhizobium leguminosarum bv. phaseoli strains.

M Vázquez, A Dávalos, A de las Peñas, F Sánchez and C Quinto

Unidad de Biología Molecular y Biotecnologia Vegetal, Centro de Investigación sobre Fijación de Nitrógeno, UNAM, Morelos, Mexico.

ABSTRACT

Nodulation by Rhizobium, Bradyrhizobium, and Azorhizobium species in the roots of legumes and nonlegumes requires the proper expression of plant genes and of both common and specific bacterial nodulation genes. The common nodABC genes form an operon or are physically mapped together in all species studied thus far. Rhizobium leguminosarum bv. phaseoli strains are classified in two groups. The type I group has reiterated nifHDK genes and a narrow host range of nodulation. The type II group has a single copy of the nifHDK genes and a wide host range of nodulation. We have found by genetic and nucleotide sequence analysis that in type I strain CE-3, the functional common nodA gene is separated from the nodBC genes by 20 kb and thus is transcriptionally separated from the latter genes. This novel organization could be the result of a complex rearrangement, as we found zones of identity between the two separated nodA and nodBC regions. Moreover, this novel organization of the common nodABC genes seems to be a general characteristic of R. leguminosarum bv. phaseoli type I strains. Despite the separation, the coordination of the expression of these genes seems not to be altered.

J Bacteriol. 1991 February; 173(3): 1250-1258




This article has been cited by other articles:

  • Calderon-Flores, A., Du Pont, G., Huerta-Saquero, A., Merchant-Larios, H., Servin-Gonzalez, L., Duran, S. (2005). The Stringent Response Is Required for Amino Acid and Nitrate Utilization, Nod Factor Regulation, Nodulation, and Nitrogen Fixation in Rhizobium etli. J. Bacteriol. 187: 5075-5083 [Abstract] [Full Text]  
  • Aguilar, O. M., Riva, O., Peltzer, E. (2004). Analysis of Rhizobium etli and of its symbiosis with wild Phaseolus vulgaris supports coevolution in centers of host diversification. Proc. Natl. Acad. Sci. USA 101: 13548-13553 [Abstract] [Full Text]  
  • Zhang, X.-X., Turner, S. L., Guo, X.-W., Yang, H.-J., Debellé, F., Yang, G.-P., Dénarié, J., Young, J. P. W., Li, F.-D. (2000). The Common Nodulation Genes of Astragalus sinicus Rhizobia Are Conserved despite Chromosomal Diversity. Appl. Environ. Microbiol. 66: 2988-2995 [Abstract] [Full Text]  
  • Keenleyside, W. J., Whitfield, C. (1996). A Novel Pathway for O-Polysaccharide Biosynthesis in Salmonella enterica Serovar Borreze. J. Biol. Chem. 271: 28581-28592 [Abstract] [Full Text]  


Copyright © 2009 by the American Society for Microbiology.   For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»