FITC-dextran for measuring apoplast pH and apoplastic pH gradients between various cell types in sunflower leaves

cells cellule colorant colorantes darkness dextranas dextrane dextrans dyes estoma feuille fluorescence fluorescencia helianthus annuus hojas leaves light luz nitrate nitrates nitratos nutrient transport obscuridad ph stomata stomate transpiration transport des substances nutritives transporte de nutrientes xilema xylem