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 ?
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 light-sensitive pump occurs in the guard cells, which surround the gas-exchange pore.
Intrinsic water use efficiency did not change significantly over time, suggesting that it may not respond to changes in CO2 concentrations over the lifetimes of individual trees, possibly because of compensating changes in stomatal density and guard cell size.
In this paper, chloroplast numbers of stomatal guard cells are considered.
Stomatal opening increases the volume of guard cells as a result of increase in the water content and this may be due to the difference in the water potential (o w) between guard cells and adjacent cells as reported by Priyadarshan and Naidu (Priyadarsan, V.
Stomata of tetracytic type are present only in the intercostal region on abaxial surface, guard cells of 31-35 [?
They found that in young leaves, ZNT1 mRNA was abundant in the bundle sheath of the veins, adjacent mesophyll cells, and guard cells of the epidermis.
The stoma is an oval hole protected by two guard cells.
For isolated guard cells, she monitored potassium flow into and out of the cells.
Stomatal pores are surrounded by specialized cells called guard cells, which open and close the holes.