Effect of low rhizosphere on growth, nitrogen fixation and nodule morphology in lucerne [allocation, partitioning]

absorption de substances nutritives anoxia anoxie cell respiration crecimiento croissance ethylene etileno fixation de l'azote growth medicago sativa metabolism metabolisme metabolismo nitrate nitrates nitratos nitrogen fixation nudosidades radiculares nutrient uptake oxygen racine resistance to injurious factors respiration cellulaire rhizobium meliloti rhizosphere rizosfera root nodules roots stems tallo tige