Potato starch grains, light micrograph

Potato starch grains, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Potato starch grains. Polarised light micrograph of a transverse section through a potato tuber (Solanum tuberosum), showing the starch grains. A central cross, called the hilum, marks the highest point of a starch grain. When viewed by polarised light they exhibit double refraction (anisotrophy) and show the characteristic dark cross of colours (blue-red and yellow-green) traversing the starch grains. Magnification: x230 when printed at 10 centimetres wide.

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Keywords: anatomical, biological, biology, botanical, botany, cell, cells, cellular, close-up, cross-section, detail, flora, grain, grains, internal structure, light micrograph, light microscope, lm, nature, part, parts, plant, plant anatomy, polarisation, polarised, polarization, polarized, potato, section, sectioned, solanum tuberosum, starch, structural, tissue, transverse

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