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Home > All Images > 1993 > November > 3 Nov 1993

Images Dated 3rd November 1993

Choose from 11 pictures in our Images Dated 3rd November 1993 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Stomata on epidermis of Elder leaf Featured 3 Nov 1993 Image

Stomata on epidermis of Elder leaf

Stomata. Coloured scanning electron micrograph of the under surface of a leaf from an Elder tree, Sambucus nigra, showing an open stomata. Stomata (stoma) are breathing pores which regulate the exchange of gases between the leaf's interior and the atmosphere. Stomatal closure is a natural response to darkness or drought. Each stomata is controlled by the water content within a pair of guard cells flanking its central pore. When these guard cells increase in water content and turgidity their inner walls bow away from each other and the stomata widens. Conversely when the guard cells lose water the stomata closes. Magnification: x715 at 6x4.5cm size

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