Vacuolar Concentrations of K, P, and Ca Vary between Cell Types within Leaves of Arabidopsis.
(A) Scanning electron micrograph of a cryosectioned, 6-week-old Arabidopsis leaf, ecotype Col-0. UE, upper epidermis; PM, palisade mesophyll; SM, spongy mesophyll; BS, bundle sheath; LE, lower epidermis. Bar = 50 μm.
(B) Concentrations of Ca, P, and K in vacuoles of different cell types in leaf 8 of 6-week-old Arabidopsis ecotype Col-0, grown in BNS. Mean + se; n = 4 cells per cell type per leaf, across 12 plants. For calibration curves, see Supplemental Figure 1 online.