TABLE 8.
Effects of mutations in nonnodulation genes on Fix phenotypes in various legumes
| Rhizobium strain | Locus or gene(s) | Producta | Regulator | Phenotypea | Plant | Reference(s) |
|---|---|---|---|---|---|---|
| A. caulinodans ORS571 | dTDP-d-gluc. synth. | Deoxy sugars | Fix− | Sesbania rostrata | 56 | |
| B. japonicum USDA110 | exoP | EPS export | Fix− | Glycine max | 10 | |
| ndvC | Cyclic β-glucans | Fix− | Glycine max | 19 | ||
| ndvB | Cyclic β-glucans | Fix− | Glycine max | 65 | ||
| M. loti NZP2037 | EPS | Fix− | Leucaena leucocephala | 127 | ||
| Fix+ | Lotus pedunculatus | |||||
| NGR234 | exoY | EPS | Fix− | Leucaena leucocephala | 106 | |
| fixF | Rhamnose-rich SPS | nodD1 | Fix− | Vigna unguiculata | 130 | |
| R. etli CFN42 | lpsβ | LPS | Fix− | Phaseolus vulgaris | 92 | |
| R. leguminosarum strain 300 | lps | LPS | Fix− | Pisum sativum | 136 | |
| bv. trifolii AR5 | LPS | Fix− | Trifolium pratense | 100 | ||
| bv. trifolii 24.1 | EPS | Fix− | Trifolium pratense | 247 | ||
| bv. trifolii LPR5 | pssD | EPS | Fix− | Trifolium repens | 270, 271 | |
| bv. trifolii TA1 | pssD | EPS | Inf+ Fix− | Trifolium pratense | 147 | |
| R. meliloti 2011 | exoAMONP | EPS 1 | Fix− | Medicago sativa | 8 | |
| exoUVWTI | EPS 1 | Fix− | Medicago sativa | 9 | ||
| R. meliloti 1021 | exoY | SG | exoS, chv1 | Inf+ Fix− | Medicago sativa | 40, 41 |
| ndvA | β-(1→2)Glucan | Fix− | Medicago sativa | 262 | ||
| R. meliloti AK631 | rkpK | KPS | Fix+ | Medicago sativa | 138 | |
| rkpK1 | KPS | exoB (galE) | Fix− | Medicago sativa | 31 | |
| R. tropici CIAT899::Tn5 | EPS | Exo− Fix+ | Macroptilium atropurpureum | 176 |
a
Abbreviations: SPS, surface polysaccharide; SG, succinoglycans; Inf, formation of infection threads; Fix, nitrogen fixation; Exo, EPS synthesis.