Table 8.

Effects of mutations in nonnodulation genes on Fix phenotypes in various legumes

RhizobiumstrainLocus or gene(s)ProductaRegulatorPhenotypeaPlantReference(s)
A. caulinodansORS571dTDP-d-gluc. synth.Deoxy sugarsFixSesbania rostrata56
B. japonicum USDA110exoPEPS exportFixGlycine max10
ndvCCyclic β-glucansFixGlycine max19
ndvBCyclic β-glucansFixGlycine max65
M. lotiNZP2037EPSFixLeucaena leucocephala127
Fix+Lotus pedunculatus
NGR234exoYEPSFixLeucaena leucocephala106
fixFRhamnose-rich SPSnodD1FixVigna unguiculata130
R. etliCFN42lpsβLPSFixPhaseolus vulgaris92
R. leguminosarum strain 300lpsLPSFixPisum sativum136
 bv. trifolii AR5LPSFixTrifolium pratense100
 bv. trifolii 24.1EPSFixTrifolium pratense247
 bv. trifolii LPR5pssDEPSFixTrifolium repens270, 271
 bv. trifolii TA1pssDEPSInf+FixTrifolium pratense147
R. meliloti 2011exoAMONPEPS 1FixMedicago sativa8
exoUVWTIEPS 1FixMedicago sativa9
R. meliloti1021exoYSGexoS,chv1Inf+ FixMedicago sativa40, 41
ndvAβ-(1→2)GlucanFixMedicago sativa262
R. melilotiAK631rkpKKPSFix+Medicago sativa138
rkpK1KPSexoB(galE)FixMedicago sativa31
R. tropiciCIAT899::Tn5EPSExoFix+Macroptilium atropurpureum176
  • a Abbreviations: SPS, surface polysaccharide; SG, succinoglycans; Inf, formation of infection threads; Fix, nitrogen fixation; Exo, EPS synthesis.