Ion uptake into guard cells causes stomatal opening : The opening of gas exchange pores requires the uptake of potassium ions into guard cells.
22.
The stomata are haplocheilic, monocyclic or dicyclic, usually depressed, with the guard cells occurring in the lowermost part of the stoma.
23.
The pore is bordered by a pair of specialized parenchyma cells known as guard cells that are responsible for regulating the size of the opening.
24.
The accumulation of these solutes within the guard cell decreases the solute potential, allowing water to enter the cell and promote aperture of the stomata.
25.
The interior of the broch contains a double cell in the side wall, and a " guard cell " at the foot of the stairs.
26.
ABA then translocates to the leaves, where it rapidly alters the osmotic potential of stomatal guard cells, causing them to shrink and stomata to close.
27.
"' Guard cells "'are specialized cells in the epidermis of leaves, stems and other organs that are used to control gas exchange.
28.
Malate, as a double anion, often accompanies potassium cations during the uptake of solutes into the guard cells in order to maintain electrical balance in the cell.
29.
They are produced in pairs with a gap between them that forms a turgid, and closed when water availability is critically low and the guard cells become flaccid.
30.
The epidermis tissue includes several differentiated cell types; epidermal cells, epidermal hair cells ( trichomes ), cells in the stomatal complex; guard cells and subsidiary cells.
