Transverse section through pine root

Transverse section through pine root

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Credit: J.C. REVY, ISM/SCIENCE PHOTO LIBRARY

Caption: Pine root. Light micrograph of a transverse (cross) section through the root of a pine tree, Pinus sp. At centre is a stele of conducting tissue containing five vascular bundles, surrounded by a thin outer cortex and epidermis. The conducting tissue of the stele consists largely of xylem vessels (blue) which transport water from root to stem and leaves. External to the xylem is phloem (small transparent cells) that conducts nutrients down to the root. Between the phloem and outer cortex is a thin blue band of sclerenchyma cells which support the stele. There is a pith at the centre of the pine root. Magnification: unknown.

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Keywords: botany, gymnosperm, light micrograph, nature, pine, pine root, pinus sp., plant, plants, root, roots, section, transverse, type, xylem

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