SEM of open stoma on tobacco leaf
Bildnummer 11537122
| False colour scanning electron micrograph of an open stoma on the surface of a tobacco leaf Nicotiana tabacum. Stomata are breathing pores scattered over the leaf surface,and sometimes stem,that regulate the exchange of gases between the leaf's interior and the atmosphere. Stomatal closure is a natural response to darkness or drought as a means of conserving water. Each pore is controlled by the turgor of two guard cells on either side; when the guard cells are full of water the pore is open; when they lose turgor,the pore closes. The flecks on the pore are salts from dried water vapour; around it are epidermal cells. Magnification: X 343 at 35mm size. Original is BW print b745/171 | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Burgess, Dr. Jeremy |
| Bildgröße: | 3543 px × 2585 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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