Images Dated 24th July 2000

Spruce needle stomata

Spruce needle stomata. Coloured scanning electron micrograph (SEM) of two stomata (pores) on the surface of a needle of a sitka spruce (Picea sitchensis). The stomata are in sunken pits. Each stoma can be opened and closed by the two guard cells (light green) on either side of it. This allows the exchange of gases between the plant and the air to be controlled. The sunken stomata and the layer of wax (pale green) covering the surface of the needle minimise water loss from the tree. This conifer is native to North America, being most common in the north-west. Magnification: x670 at 6x7cm size

© POWER AND SYRED/SCIENCE PHOTO LIBRARY

Violet-toothed Polypore Mushroom on dead Beech (Trichaptum biformis), Red River Gorge

Violet-toothed Polypore Mushroom on dead Beech (Trichaptum biformis), Red River Gorge, KY, Kentucky

© Dennis, David M. / Animals Animals/Earth Scenes

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Venus Flytrap catches Fly (Dionaea muscipula), coastal North & South Carolina

© Dennis, David M. / Animals Animals/Earth Scenes

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