guard cells

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guard cells

one of a pair of specialized epidermal cells forming a pore (stoma) at the leaf surface. See STOMA for a description of how the stomatal aperture is regulated.
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In her first body paragraph, Bridget focused on each of the two cells in turn: firstly root hair cells and then guard cells.
The accumulation and release of potassium by stomata guard cells lead to changes in their turgid, resulting in stomata opening and closing (Fletcher et al.
After microscopically examining 70 different specimens of Agave and Yucca, it is apparent that the stoma and guard cell patterning of these two desert succulent genera are distinct.
NO also increased chlorophyll content in pea leaves, mainly in guard cells (Leshem et al.
The plant has the ability to modify water movement in various ways with a series of linked resistances; the most important of which is the guard cells on the leaf surface, which exerts stomatal regulation.
The light-sensitive pump occurs in the guard cells, which surround the gas-exchange pore.
Stomata respond to the concentration of ABA in the guard cell apoplast.
Miller-Rushing and colleagues found that stomatal density declined while guard cell length increased in oaks and hornbeams, although these changes were not dependent on the magnitude of changes in CO2 concentrations.
5 chloroplasts per guard cell are not known from nature, with a single exception.
In all treatments, in an environment with natural light, the stomata have guard cells with external periclinal walls that present a rather sharp thickening, forming a crest around the external atrium, and underdeveloped substomatic chambers (Figures 3A, E, 4A, C, D).
A variety of characters like epidermal cells, subsidiary cells, guard cells, trichomes, macro-hairs, micro-hairs and stomata were used as a tool for the taxonomic grouping of different species.