Orchid starch grains, light micrograph

Orchid starch grains, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Orchid starch grains. Polarised light micrograph of a transverse section through an orchid tuber (Phaius grandifolius), showing the starch grains. Starch is made from sucrose, a sugar formed in the leaves during photosynthesis, which is then transported to the tuber (potato) by the phloem (vascular tissue). Starch is used as a source of energy for a growing plant. Magnification: x44 when printed at 10 centimetres wide.

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Keywords: anatomical, angiosperm, angiosperms, biological, biology, botanical, botany, cell, cells, cellular, close-up, cross-section, detail, energy reserve, flora, grain, grains, internal structure, light micrograph, light microscope, nature, nun orchid, nun's lily, nun's orchid, part, parts, phaius grandifolius, phaius tankervilleae, plant, plant anatomy, polarisation, polarised light micrograph, polarised light microscope, polarization, polarized, root, section, sectioned, starch, stored, structural, sugar, tissue, transverse, tuber

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