Sweet Pea Stem #1
by Dr Keith Wheeler/science Photo Library
Title
Sweet Pea Stem #1
Artist
Dr Keith Wheeler/science Photo Library
Medium
Photograph - Photograph
Description
Sweet pea stem. Light micrograph of a transverse section through the stem of a perennial sweet pea (Salicornia europaea) plant. The stem has evolved two green wings (left and right) to increase photosynthesis. These wings contain spongy mesophyll (pink), similar to a leaf, and several small vascular bundles (dark spots). The main stem has a ring of collateral vascular bundles (dark pink blobs) each with an outer layer of supporting fibres (sclerenchyma, green-orange-blue). Under this are phloem sieve tubes (pink), metaxylem (large vessels, brownish-red), and protoxylem (small vessels, pink). Most of the pith parenchyma has broken down leaving a hollow stem (white, centre). Magnification: x14 when printed 10 centimetres wide.
Uploaded
October 24th, 2019
Embed
Share
Comments
There are no comments for Sweet Pea Stem #1. Click here to post the first comment.