Stomatal pores on broad bean leaf

Stomatal pores on broad bean leaf

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Caption: Stomatal pores. Light micrograph of stomatal pores on the surface of a broad bean (Vicia Faba) leaf. The stomata are gaps between two kidney shaped guard cells (brown). Criss-crossed leaf epithelial cells surround these. Guard cells open and close the stomata depending on light, temperature and the internal water supply of the leaf. Open stomata allow gases to be exchanged by leaf tissues during photosynthesis. When closed, stomata can prevent water loss during dry periods. The broad bean, also called horsebean or Windsor bean, has been cultivated as food since prehistoric times. Magnification: x200 at 35mm size.

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Keywords: bean, botany, broad bean, guard cell, iris, leaf, leaf surface, leaves, light micrograph, nature, plant, plants, stoma, stomata

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