Characterization of some non-fixing mutants of common bean (Phaseolus vulgaris L.)

biological differences color colour couleur crecimiento croissance enzymic activity genetic variation grafting greffage growth injerto nitrate nitrate reductase nitrates nitrato reductasa nitratos nodulation nudosidades radiculares nutrientes nutrients phaseolus vulgaris reduction rhizobium leguminosarum root nodulation root nodules strain differences substance nutritive