Abstract
R. leguminosarum plasmids encode a large number of genes responsible for catabolism of a wide variety of sugars, amino acids and other carbon sources. Analysis of the role some of the catabolic genes play in influencing competition for nodulation, using isogenic mutant strains, has demonstrated that catabolism of rhamnose plays a significant role in the clover symbiosis, whereas catabolism of ribitol and sorbitol does not. Since chemotaxis towards carbon sources may also be important in competition, we have analysed a number of genes potentially encoding chemotaxis chemoreceptors, and shown that two of these do affect competitive success of a R. leguminosarum bv. viciae strain on pea plants. These chemoreceptor genes appear to be down regulated during symbiosis.
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© 1999 Springer Science+Business Media New York
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Hynes, M.F., Oresnik, I., Yost, C.K., Noel, T.C. (1999). Analysis of Factors Affecting Competition for Nodulation of Legumes by Rhizobium Leguminosarum . In: Martĺnez, E., Hernández, G. (eds) Highlights of Nitrogen Fixation Research. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4795-2_13
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DOI: https://doi.org/10.1007/978-1-4615-4795-2_13
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