The guard cells are are two crescent-shaped cells on either side of the pore of a stoma in the epidermis of the stem or leaf. By changing shape, the guard cells are able to cover and uncover the pore of the stoma and let oxygen out and carbon dioxide into the stem or leaf. Changes in turgor pressure is the mechanism by which the shape of the guard cell is altered so as to cover and uncover the pore. DIAGRAMS: Stomata / Stomata PHOTOS: Leaf Cross Section
Specialized cells, occurring usually in pairs that surround the stomata of a plant and aid in the control of the stomatal pore size.
paired, specialized, epidermal cells that contain chloroplasts and surround a stoma
Epidermal plant cells found in pairs surrounding the stomata of leaves. By increasing or decreasing their size, guard cells regulate gas exchange by opening and closing individual stoma.
In plants, paired epidermal cells which surround and control the opening of a stoma (pore).
Control the opening and closing of the stomata.
Cells that control opening and closing of stomata in plants. 536
Specialized epidermal cells that flank stomates and whose opening and closing regulates gas exchange and water loss. PICTURE 1 | PICTURE 2
the two cells that open and close the stomata to allow gas exchange.
Pair of cells which surround a stomate and regulate its size by altering their shape.
Pair of specialised cells in a plant epidermis forming a pore or stomate