Starch grains in cells of Jack bean

Starch grains in cells of Jack bean

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Caption: False-colour scanning electron micrograph of starch grains, or amyloplasts (large dark bodies, 4-6 per cell), in cells of a cotyledon (seed leaf) of a mature Jack bean, Canavalia ensiformis. Bean cotyledons are storage organs in the seed contain- ing reserves of starch, from which the germinating seed draws nourishment. Beans (legumes) are a source of protein in the human diet. The protein is stored in small vacuoles called protein bodies (tiny ovals). Air spaces are visible between cells. Magnification: X100 at 35mm size. Original is BW print B100/008.

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Keywords: amyloplast, botanical science, botany, canavalia ensiformis, cell, cells, cotyledon, jack bean, lectin poison, plant, plant structure, plastid, plastids, protein bodies, scanning electron micrograph, seed leaf, sem, starch grain, type

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