Foxglove Root is a photograph by Dr Keith Wheeler/science Photo Library which was uploaded on September 24th, 2019.
Foxglove Root
Foxglove root. Light micrograph of a section through the root of a foxglove (Digitalis purpurea) plant, showing secondary thickening. From outer root... more
Title
Foxglove Root
Artist
Dr Keith Wheeler/science Photo Library
Medium
Photograph
Description
Foxglove root. Light micrograph of a section through the root of a foxglove (Digitalis purpurea) plant, showing secondary thickening. From outer root to centre: layers of cork cells (red); cork cambium (blue); phelloderm and cortex of parenchyma (blue); pericycle (blue ring); ring of outer (primary) and inner (secondary) phloem cells (blue), with sieve tubes and plates (blue); layer of cambium outside the xylem (blue); ring of xylem (red). In the centre of the root there is no pith, but xylem primary metaxylem and protoxylem. The primary cambium has produced secondary xylem, which has filled in-between the xylem arms to form a ring with very large xylem vessels, wood parenchyma and tracheid cells. Magnification: x37 when printed 10 centimetres wide.
Uploaded
September 24th, 2019
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