Effects of P deficiency on assimilation and transport of nitrate and phosphate in intact plants of castor bean (Ricinus communis L.).

absorption de substances nutritives anabolism anabolisme anabolismo anion aniones anions azote deficiencia de minerales fisiologia vegetal floema fosfatos fosforo metabolism metabolisme metabolismo mineral deficiencies mineral nutrients nitrate nitrates nitratos nitrogen nutrient uptake nutrientes minerales nutrition des plantes phloem phosphate phosphates phosphore phosphorus plant nutrition plant physiology reduction ricinus communis xilema xylem