Chemically specific concentration images of different parts of
A. bisulcatus. From left to right: optical micrograph;
effective tissue thickness; concentration of organoselenium;
concentration of selenate. Top to bottom: mature, intermediate and
young leaves, and roots. The mature leaves, young leaves, and roots
were taken from the same plant, the mature leaves from the lowest shoot
and the young leaves from the highest shoot of the same plant branch.