Yew tree leaf, light micrograph

Yew tree leaf, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Yew tree leaf. Light micrograph of a transverse section through the leaf (pinna) of a yew tree, (Taxus baccata). The structure has xerophytic (drought plants) characteristics. The lower and upper epidermal cells are covered in a thick waterproof cuticle layer. Under the upper epidermis are two layers of palisade mesophyll, below which are the irregular cells of the spongy mesophyll. The vascular bundle (centre) consists of upper xylem tracheid cells (red) and lower phloem sieve cells (blue). A cambium layer is in-between the xylem and phloem. Magnification: x106 when printed 10 centimetres wide.

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Keywords: biological, biology, botanical, botany, cambium, cell, cell biology, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, cytology, epidermis, flora, gymnosperm, gymnosperms, leaf, light micrograph, light microscope, lm, midrib, nature, palisade mesophyll, phloem sieve cells, plant, plant structure, sectioned, support, supportive, taxus baccata, tracheid, tracheids, transverse section, vascular bundle, white background, xerophyte, xerophytic characteristics, xylem, yew

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