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Question
Which one gives the most valid explanation for guard cell movements?
Which one gives the most valid explanation for guard cell movements?
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Solution
The correct option is B Potassium influx and efflux
Stomatal regulation means regulation opening and closing of guard cells.In the presence of light, potassium ion enters into guard cells thereby reducing the water potential while increasing the OP of cell sap. Thus endosmosis occurs, guard cells become turgid and the stomata opens.In absence of light, efflux of potassium ions from guard cells occurs and there is an increase in the concentration of CO2 inside the guard cells occurs. Due to this, guard cells lose their turgidity and stomata closes.So the correct answer is 'Potassium influx and efflux'.
Stomatal regulation means regulation opening and closing of guard cells.
In the presence of light, potassium ion enters into guard cells thereby reducing the water potential while increasing the OP of cell sap. Thus endosmosis occurs, guard cells become turgid and the stomata opens.
In absence of light, efflux of potassium ions from guard cells occurs and there is an increase in the concentration of CO2 inside the guard cells occurs. Due to this, guard cells lose their turgidity and stomata closes.
So the correct answer is 'Potassium influx and efflux'.
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