Etioplast, TEM

Etioplast, TEM

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Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Caption: Etioplast. Coloured transmission electron micrograph (TEM) of a section through a maize (Zea mays) leaf cell showing an etioplast (yellow). This is an immature chloroplast that forms when a seed is germinated in darkness. Chloroplasts are the cell organelles that convert sunlight to energy. The etioplast's membranes have formed a crystalline array, instead of the usual stacks of grana seen in a mature chloroplast, known as a prolamellar body. Normal chloroplast structure is generated from an etioplast within a few hours of the etiolated plant being exposed to light.

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Keywords: biological, biology, black background, botanical, botany, cell biology, chloroplast, coloured, corn, crystalline array, cytological, cytology, darkness, etiolated, etioplast, false-coloured, flora, immature, leaf, maize, microscope, nature, no-one, nobody, organelle, plant, plant cell, plastid, prolamellar body, structure, tem, transmission electron, transmission electron micrograph, zea mays

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