Science Source Stock Photo - Pine stem, light micrograph

Pine stem, light micrograph

Description: Pine stem. Polarized light micrograph of a section through part of the stem of a pine (Pinus sp.) tree, showing the growth rings. From outer to inwards: outer layer of cork (brown); cortex - made up of parenchyma cells (red) with resin canals; ring of secondary phloem composed of sieve cells (blue), parenchyma and albuminous cells (red); vascular cambium cells (blue); xylem - with ten growth rings each made up of large thin-walled tracheid cells (light brown) of spring wood, and smaller thick-walled tracheid cells (dark brown) of autumn wood; thin files of parenchyma and tracheid cells (brown). The xylem includes large circular resin canals (lacunae, green) Magnification: x13 when printed 10 centimeters wide.

Credit:

Dr. Keith Wheeler/Science Source

Unique identifier: SS2598249

Legacy Identifier: SR6231

Type: Image

Size: 3829px × 4564px (~49 MB)

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