Pine Stem #15 is a photograph by Dr Keith Wheeler/science Photo Library which was uploaded on November 15th, 2019.
Pine Stem #15
Pine stem. Polarised light micrograph of a section through a growth ring in the stem of a Scot's pine (Pinus sylvestris) tree, showing thick-walled... more
Title
Pine Stem #15
Artist
Dr Keith Wheeler/science Photo Library
Medium
Photograph
Description
Pine stem. Polarised light micrograph of a section through a growth ring in the stem of a Scot's pine (Pinus sylvestris) tree, showing thick-walled tracheid cells (yellow-orange) of older autumn wood. There are thin files of parenchyma and tracheid cells (horizontal, dark) of the subsidiary medullary rays, which pass food substances radially. Many of the tracheid cell walls have bordered pits (circles, yellow-brown) that pass water and minerals side-ways. Magnification: x32 when printed 10 centimetres wide.
Uploaded
November 15th, 2019
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