Cells in a fractured turnip leaf

Cells in a fractured turnip leaf

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Caption: False-colour scanning electron micrograph of a fractured leaf of the turnip, Brassica rapa. The horizontal lines of cells near top & bottom form the leaf's epidermis. The epidermis, particularly the under- side, is dotted with stomata: pores that regulate the leaf's exchange of gases with the atmosphere. The leaf interior contains mesophyll cells, some seen broken open. They consist of palisade mesophyll (top) & spongy mesophyll (bottom). The packed palisade cells contain chloroplasts, sites of photosynthesis. The spongy mesophyll cells are loosely packed, with few chloroplasts; they are more involved with gas exchange. Magnification: x94 at 6x4.5cm size.

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Keywords: botany, brassica rapa, chloroplast, epidermis, leaf, leaves, mesophyll, nature, palisade mesophyll, plant, plants, sem, spongy mesophyll, turnip

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