Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Shoot apices of juvenile and adult maize shoots. (a) Cleared specimen of the shoot apex of an 8-day-old maize seedling with two transition leaf primordia (leaves 6 and 7) and an adult leaf primordium (leaf 8). Plants at this developmental stage were used for clonal analysis. (b) Longitudinal section through the shoot apex of a plant with six adult leaf primordia (leaves 8–13). Plants at this developmental stage were used for apex culture. (Bar = 100 μm.)
