guard cell

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guard cell

[′gärd ‚sel]
(botany)
Either of two specialized cells surrounding each stoma in the epidermis of plants; functions in regulating stoma size.
References in periodicals archive ?
III depicts the healthy as well as damaged epidermal and guard cells of Bougainvillea spectabilis at control and polluted zones, respectively.
Stomata abaxial occur at the same level of the other epidermal cells; guard cells with periclinal thickened cell walls.
Ozone exposure reduced potassium ion flow into guard cells without affecting outward flow, which indicated that ozone inhibits pore openings.
The guard cells of the mutant plant were hypersensitive to the ABA hormone and therefore showed an enhanced ability for ABA to close the stomatal pores in leaves," said Schroeder.
3C, 3D, 4A, 4C, 4D), with two large guard cells surrounding the stoma on either side (Figs.
Stomata are lip-shaped pores surrounded by a pair of guard cells that control the size of the opening.
NO also increased chlorophyll content in pea leaves, mainly in guard cells (Leshem et al.
The light-sensitive pump occurs in the guard cells, which surround the gas-exchange pore.
Several types of cells in plant leaves contain carbonic anhydrases, including those responsible for photosynthesis, but Schroeder's team showed that the enzymes work directly within a pair of cells, called guard cells, that control the opening of each breathing pore.
Stomata slightly sunken; short terminal cells overarching guard cells.
The stomata are each flanked by two guard cells, which control these vitally important portals to the leaf.
Stomata superficial, arranged in rows at intercostal regions; short terminal cells overarching guard cells.