Cation fluxes in the saps of Sinapis alba during the floral transition [partitioning]

brassica alba calcio calcium cell division division cellulaire exsudat exudados exudates feuille floraison induite fotoperiodismo hojas induced flowering leaves magnesio magnesium nutrient transport photoperiodicity potasio potassium racine roots sap savia transport des substances nutritives transporte de nutrientes