Regulation of aldehyde oxidase and nitrate reductase in roots of barley (Hordeum vulgare L.) by nitrogen source and salinity

aba ammonia ammoniac azote barley cebada enzimas enzyme enzymes enzymic activity hordeum vulgare mineral nutrients nitrate nitrate reductase nitrates nitrato reductasa nitratos nitrogen nutrientes minerales nutrition des plantes orge oxidoreductases oxidorreductasas plant growth substances plant nutrition racine roots salinidad salinity sustancias de crecimiento vegetal