Pine needle stoma. Coloured environmental scanning electron micrograph (ESEM) of a stoma (red) on the surface of a pine needle (Pinus sp.). Stomata are pores that are the site of gaseous exchange in the plant. The opening and closing of the stomata is controlled by semicircular guard cells. When the guard cells are turgid the stomata are open and when they are flaccid the stomata are closed | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Berrod, Thierry / Mona Lisa Production |
Bildgröße: | 3427 px × 2579 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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