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.
(A), cross-section of a cell within its surrounding sheath. (B) longitudinal section of a trichome. Scale bar: 1 μm. s = sheath; t = thylakoids; n = nucleoplasm. Thylakoids are arranged more or less parallel in a parietal position.
