Rhizobium leguminosarum explained

Rhizobium leguminosarum is a bacterium which lives in a mutualistic symbiotic relationship with legumes, and has the ability to fix free nitrogen from the air.[1] R. leguminosarum has been very thoroughly studied—it has been the subject of more than a thousand publications.

Morphology

Rhizobium leguminosarum is a Gram-negative, motile, rod-shaped, aerobic bacterium.[2]

Common biovars

Rhizobium leguminosarum biovar trifolii, and R. leguminosarum biovar viciae are the most commonly studied biovars of R. leguminosarum, with certain studies seemingly treating R. trifolii as its own species.[3]

Fatty acid synthesis

Rhizobium leguminosarums acyl carrier protein differs from most ACPs by having a C-terminus extension. This ACP is also used in the synthesis of unusually long ACPs which themselves are then used in the synthesis of the R. leguminosarum nod factor.[4]

Uses

R. leguminosarum is widely used in the inoculation of legume seeds. The sv. trifolii strain U204 is commercially used to inoculate white and red clover in particular, but better strains for this purpose are being developed.[5]

Research has been carried out into the role that R. leguminosarum could play in promoting growth of canola and lettuce.[6]

External links

Notes and References

  1. The genome of Rhizobium leguminosarum has recognizable core and accessory components. Young. J Peter W. Crossman. Lisa C. Johnston. Andrew WB. Thomson. Nicholas R. Ghazoui. Zara F. Hull. Katherine H. Wexler. Margaret. Curson. Andrew RJ. Todd. Jonathan D. Poole. Philip S. Mauchline. Tim H. East. Alison K. Quail. Michael A. Churcher. Carol. Arrowsmith. Claire. Cherevach. Inna. Chillingworth. Tracey. Clarke. Kay. Cronin. Ann. Davis. Paul. Fraser. Audrey. Hance. Zahra. Hauser. Heidi. Jagels. Kay. Moule. Sharon. Mungall. Karen. Norbertczak. Halina. Rabbinowitsch. Ester. Sanders. Mandy. Simmonds. Mark. Whitehead. Sally. Parkhill. Julian. Genome Biology. 2006. 7. 4. R34. 10.1186/gb-2006-7-4-r34. 1557990. 16640791. free.
  2. Web site: Rhizobium leguminosarum. Biology Online Dictionary. 8 December 2015.
  3. An. JH. Kim. YS. A gene cluster encoding malonyl-CoA decarboxylase (MatA), malonyl-CoA synthetase (MatB) and a putative dicarboxylate carrier protein (MatC) in Rhizobium trifolii--cloning, sequencing, and expression of the enzymes in Escherichia coli. European Journal of Biochemistry. 15 October 1998. 257. 2. 395–402. 9826185. 10.1046/j.1432-1327.1998.2570395.x. free.
  4. 1 . 74 . 2005 . 791–831 . . . 0066-4154 . White . Stephen W. . Zheng . Jie . Zhang . Yong-Mei . Rock . Charles O. . The Structural Biology of Type II Fatty Acid Biosynthesis . 10.1146/annurev.biochem.74.082803.133524 . (COR ORCID 0000-0001-8648-4189).
  5. Irisarri . Pilar . Cardozo . Gerónimo . Tartaglia . Carolina . Reyno . Rafael . Gutiérrez . Pamela . Lattanzi . Fernando A. . Rebuffo . Mónica . Monza . Jorge . Selection of Competitive and Efficient Rhizobia Strains for White Clover . Frontiers in Microbiology . 23 April 2019 . 10 . 768 . 10.3389/fmicb.2019.00768 . free. 6489563 .
  6. Noel. TC. Sheng. C. Yost. CK. Pharis. RP. Hynes. MF. Rhizobium leguminosarum as a plant growth-promoting rhizobacterium: direct growth promotion of canola and lettuce. Canadian Journal of Microbiology. March 1996. 42. 3. 279–83. 8868235. 10.1139/m96-040.

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