Daisy leaf. Coloured scanning electron micrograph (SEM) of the surface of a daisy leaf (family Asteraceae,formerly Compositae). Three stomata (leaf pores) can be seen. Stomata are the site of gaseous exchange in a plant. The opening and closing of the stomata is controlled by semi- circular guard cells,which swell and become turgid to close the openings | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Gschmeissner, Steve |
Taille de l’image : | 3500 px × 2345 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |