Scanning electron microscope image of Nicotiana alata stem cross section. Image shows outer epidermal layer, followed by the cortex and then large vascular bundles. The vascular bundles contain the phloem (nearest the cortex) and xylem.
Biological Process: Plant stem organization
See http://remf.dartmouth.edu:8080/EM-Wiki/36 for technical protocol
Author: Louisa Howard
Source: The Cell: An Image Library