A, Photographs of external shape of elongating
stem and sections from each developmental region: 1, node; 2,
divisional zone at the basal region of internode; 3, elongating zone of
internode; and 4, elongated zone of internode. B, Differential
expression of XET-related genes in elongating stems.
Each lane contains 10 μg of total RNA from the regions designated in
A.