Stoma
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In botany, a stoma, also called a stomate, is a pore found in the epidermis of leaves, stems, and other organs, that controls the rate of gas exchange between the internal air spaces of the leaf and t
Stoma in a tomato leaf shown via colorized scanning electron microscope image
A stoma in horizontal cross section
The underside of a leaf. In this species (Tradescantia zebrina), the guard cells of the stomata are green because they contain chlorophyll while the epidermal cells are chlorophyll-free and contain red pigments.
Electron micrograph of a stoma from a bok choy (Brassica chinensis) leaf
Crassulacean acid metabolism
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Crassulacean acid metabolism, also known as CAM photosynthesis, is a carbon fixation pathway that evolved in some plants as an adaptation to arid conditions that allows a plant to photosynthesize duri
The pineapple is an example of a CAM plant.
Overnight graph of CO2 absorbed by a CAM plant
CAM is named after the family Crassulaceae, to which the jade plant belongs.
Cross section of a CAM (Crassulacean acid metabolism) plant, specifically of an agave leaf. Vascular bundles shown. Drawing based on microscopic images courtesy of Cambridge University Plant Sciences Department.