Conifer needle, SEM

Conifer needle, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Conifer needle. Coloured scanning electron micrograph (SEM) of a section through a needle (leaf) from a conifer tree, showing the vascular bundle (large round cluster). The vascular bundle consists of xylem (small orange openings, centre) and phloem (pale yellow, surrounding the xylem) tissues. Xylem transports water and mineral nutrients from the roots throughout the plant and phloem transports carbohydrates and hormones around the plant. Magnification: x400 when printed 10 centimetres wide.

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Keywords: axial, biological, biology, botanical, botany, cell, coloured, conifer, coniferous, cross-section, evergreen, false-colour, false-coloured, flora, histological, histology, leaf, many, multiple, nature, needle, phloem, plant, scanning electron micrograph, scanning electron microscope, section, sectioned, sem, tissue, transverse, tree, vascular bundle, xylem

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