Brugmansia insignis (angel’s trumpet); confocal image

Stomata open and close pores on the surface of leaves and stems to allow plants to take in carbon dioxide and release oxygen as a byproduct of photosynthesis. The apertures are surrounded by bean-shaped parenchymatic cells (guard cells), which, through astonishingly complex signalling networks, control the size of the openings in order to regulate the gaseous exchange and control transpiration.

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#stomata
#botany