Mean relative concentrations (based on Ca) of Zn,
Mg, P, S, Cl, and K in different types of cells of mature leaves and
young leaves of
T. caerulescens. Plants were grown on
4000 μg Zn g
−1 for 6 weeks. Frozen, hydrated leaf
tissues were prepared for EDXMA spectrum analysis on central rectangles
of randomly selected cells. Relative concentrations were calculated
using the following formula:
The slopes were obtained from the multi-element
calibrations. Bars represent
ses (
n =
4–7).