Stomata on epidermis of rose leaf

Stomata on epidermis of rose leaf

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Caption: Stomata on a rose leaf. Polarised light micrograph of the lower leaf surface of a Garden Rose Rosa sp., showing stomata. Variously shaped epidermal cells cover the leaf surface. At right are elongated cells which form a branching leaf vein. Scattered on the epidermis are stomata (singular: stoma), tiny pores each of which is bordered by two kidney-shaped guard cells. Guard cells serve to open and close the stoma: opening the pore allows gases to be exchanged by leaf tissues during photosynthesis; and closing the pore at night or during dry periods prevents water loss. In the rose, more stomata occur on the underside of leaves. Magnification: x108 at6x4.5cm size. Magnification: x63 at 35mm size.

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Keywords: botany, leaf, leaf surface, leaves, nature, of rose, plant, plants, rosa sp., rose, stoma, stomata

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