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chlorine
(klor-een)an extremely pungent gaseous element with antiseptic and bleaching properties. It is widely used to sterilize drinking water and purify swimming pools. In high concentrations it is toxic. ...
guard cell
A specialized type of plant epidermal cell (see epidermis), 2 of which surround each stoma. Changes in their turgidity cause stomatal opening and closing. This procees is not fully understood but ...
nasty
The response of a plant organ to a non-directional stimulus (e.g. the opening or closing of flowers in response to changes in light intensity or temperature). The plant may respond by changes in cell ...
osmosis
The movement of water or of another solvent from a region of low solute concentration to one of higher concentration through a semi-permeable membrane. It is an important mechanism in the uptake of ...
plasmolysis
Temporary shrinkage of the protoplasm of a plant or bacterial cell away from the cell wall, caused by the withdrawal of water from the cell.—plasmolyse vb.
pressure potential
The hydrostatic pressure to which water in a liquid phase is subjected. It was known formerly as wall pressure or turgor pressure. In a turgid plant cell, pressure potential is usually positive but ...
tropism
The directional growth of a plant organ in response to an external stimulus, such as light, touch, or gravity. Growth towards the stimulus is a positive tropism; growth away from the stimulus is a ...
turgor Quick reference
The Oxford Dictionary of Sports Science & Medicine (3 ed.)
The state of being distended and congested.
turgor pressure Quick reference
World Encyclopedia
Hydrostatic pressure generated in cells of plants and bacteria as a result of the uptake of water by osmosis.
wilting
The limpness found when plant tissues contain insufficient water to hold the cells rigid. This may occur when the rate of transpiration exceeds the rate at which water is able to enter the root ...
