Open stomata on tobacco leaf
Bildnummer 11537129
| False-colour scanning electron micrograph (SEM) of open stomata on the surface of a tobacco leaf,Nicotiana tabacum. Stomata are breathing pores scattered over the surfaces of leaves,& sometimes stems; they regulate the exchange of gases between the leaf's interior & the atmosphere. Stomatal closure is a natural response to darkness & to drought (when it is a means of conserving water). Each pore is controlled by two guard cells on either side; when the guard cells are full of water the pore is open; when they lose turgidity,the pore closes. The jigsaw puzzle pattern around the stomata corresponds to the cells of the leaf epidermis. Magnification: x450 at 6x4.5 cm size | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Burgess, Dr. Jeremy |
| Bildgröße: | 4242 px × 3281 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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