Ginkgo leaf stalk, light micrograph

Ginkgo leaf stalk, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Ginkgo leaf stalk. Light micrograph of a transverse section through the leaf stalk (petiole) of a ginkgo tree (Ginkgo biloba). The outer epidermis (black-brown) surrounds the cortex, which consists of parenchyma cells (blue) with inter-cellular spaces and resin canals (white spacess) characteristic of gymnosperms. The kidney-shaped vascular cylinder (centre) is surrounded by a single-layer endodermis, inside which are the tracheid cells (red) of the xylem and the sieve cells (blue and light orange) of the phloem. Magnification: x14 when printed 10 centimetres wide.

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Keywords: biological, biology, botanical, botany, canals, cell, cell biology, cells, cortex, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, cytology, endodermis, epidermis, flora, gingko, ginkgo, gymnosperm, gymnosperms, inter-cellular space, leaf, light micrograph, light microscope, lm, maidenhair tree, nature, parenchyma, petiole, phloem, plant, plant structure, resin canal, sectioned, sieve cells, spaces, stalk, stem, support, supportive, tracheid, tracheids, transverse section, tree, vascular bundle, white background, xylem

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