Cross-inoculation Relationships of Psophocarpus tetragonolobus and its Rhizobium with other Legumes and Rhizobia.

Abstract

Representative strains of Rhizobium from six cross-inoculation groups were inoculated onto winged bean (P. tetragonolobus) and an isolate from P. tetragonolobus was inoculated onto legumes from five cross-inoculation groups. P. tetragonolobus was effectively nodulated by two isolates from itself and a Rhizobium of the Cowpea Group. It was ineffectively or partial.Jy effectively nodulated by Rhizobia of the Lupin, Medic, Pea and Clover cross-inoculation groups. Stylosanthes guianensis was effectively nodulated and Phaseolus vulgaris ineffectively nodulated by an isolate from P. tetragonolobus. The results show that P. tetragonolobus belongs to the cowpea crossinoculation miscellany and is promiscuous with regard to nodulation by Rhizobium.