Rhizobium-legume symbiosis and

Phenylpropanoids in Plant Defense and Plant-Pathogen Interactions Flavonoids and the Rhizobium-Legume Symbiosis... 

One feature of the rhizobium-legume symbiosis is the high degree of specificity that many legumes and their symbiotic partners exhibit. For example, Sinorhizobium meliloti, the well-characterized bacterial symbiont of alflalfa and related Medicago species, is unable to nodule its close relative Pisum sativum (Mendel s pea), and conversely pea symbionts do not nodulate Medicago species. It is now clear that there are multiple molecular determinants... 

The Rhizobium-legume symbiosis, an interaction between a prokaryote (Rhizobium) and a eukaryote (legume), requires a series of sequential induction and function of both bacterium-encoded (bac-teroidins) and host-encoded (nodulins) nodule-specific proteins. It has been shown that many plant (Peters et al., 1986 Firmin et al., 1986 Djordjevic et al., 1987 Sadowsky et al., 1988 see also Peters Verma,... 

It is a characteristic of the rhizobium-legume symbiosis that the bacteria exhibit great specificity in their choice of host, indeed the genus Rhizobium is divided into species on the ability of the strain to form nodules in specific plant species (Table 6.1). Inter-species and inter-strain nodulation may occur, although often the nodules produced are atypical and fail to fix nitrogen effectively. 

Linear Homotetrasaccharides.-The total synthesis of the rhizobium nodulation factor 18 and related compounds, which are critical in rhizobium legume symbiosis, have been completed by use of the glycosyl fluoride procedure. ... 

C. Freiberg, R. Fellay, A. Bairoch, W. J. Broughton, A. Rosenthal, and X. Perret, Molecular basis of symbiosis between Rhizobium and legumes. Nature 387 394-401 (1997). 

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