Abstract
Congo red absorption is generally considered a contraindication of Rhizobium. However, R. leguminosarum takes up the dye on yeast extract-mannitol agar. The uptake of congo red varies among strains of R. leguminosarum, as shown elsewhere with strains of R. trifolii and R. meliloti. Congo red absorption does not distinguish rhizobia from other bacteria, but may be useful as a strain marker.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Bromfield E. S., Jones D. G. A strain marker in Rhizobium trifolii based on the absorption of congo-red. Zentralbl Bakteriol Naturwiss. 1980;135(4):290–295. doi: 10.1016/s0323-6056(80)80002-4. [DOI] [PubMed] [Google Scholar]
- Hahn N. J. The Congo red reaction in bacteria and its usefulness in the identification of rhizobia. Can J Microbiol. 1966 Aug;12(4):725–733. doi: 10.1139/m66-099. [DOI] [PubMed] [Google Scholar]