symbiose (1) sol (1) racine (1) phosphate (1) fixation de l'azote (1) azote (1) famille (1) exportation (1) taux (1) Control (1) Genes (1) Arabidopsis (1) Medicago (1) Transportation (1) Symbiosis (1) Soils (1) Scarcity (1) Play (1) Plants (1) Pi (1) Nitrogen--Fixation (1) Nitrogen (1) Legumes (1) Homeostasis (1) Growth (1) Families (1) Cells (1) Cardiovascular system (1) Blood-vessels (1) Addition (1)