Reed stalk, light micrograph
Polarised darkfield light micrograph of a transverse section through the stalk of a reed plant showing vascular bundles (orange). Vascular bundles are composed of xylem and phloem tissues, which transport water and carbohydrates around the plant respectively. Magnification: x186 when printed at 10 centimetres wide., by MAREK MIS/SCIENCE PHOTO LIBRARY
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