Symbiotic N2 fixation response to drought

agua del suelo carbon carbone carbono drought drought stress eau du sol enzymic activity fisiologia vegetal fitomejoramiento fixation de l'azote floema genetic variation legumes leguminosas metabolism metabolisme metabolismo nitrogen fixation nitrogen metabolism nitrogenasa nitrogenase nudosidades radiculares phloem plant breeding plant physiology plant water relations relaciones planta agua relation plante eau rendement rendimiento root nodulation root nodules soil water turgencia turgescence turgor water stress yields