TEM of chloroplasts from Coleus blumei

TEM of chloroplasts from Coleus blumei

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Credit: DR.JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Caption: Transmission electron micrograph of green chloroplasts from a variegated leaf of the house plant Coleus blumei. Chloroplasts are the sites of photosynthesis in plants & green algae; a process whereby chlorophyll pigments, stimulated by light, initiate a chemical reaction, which leads to the formation of sugar from carbon dioxide. Chloroplasts are usually lens-shaped & bound by two membranes, the inner one of which is folded into a series of stacks called grana (threadlike). Chlorophyll pigments are stored on the grana. The large white regions in the chloroplasts are starch grains, a product of photosynthesis. Magnification X25,000 (at 8x10 size), X 3570 (at 35mm size).

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Keywords: botanical science, botany, cell, chloroplast, chloroplasts, electron micrograph, grana, photosynthesis, plant structure, plastid, plastids, starch, tem, transmission

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