STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Starch grains. Coloured scanning electron micrograph (SEM) of starch grains (yellow) in the parenchyma of a Clematis sp. plant. Starch is synthesised from sucrose, a sugar produced by the plant during photosynthesis, and used as a source of energy. It is stored as grains in structures called amyloplasts (pink). Magnification: x800 when printed at 10 centimetres wide.
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