How do the guard cells regulate opening and closing of stomatal pores?

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Solution

$∙$ The opening and closing of stomatal pore is a function of guard cells, and is regulated by the entry of water inside guard cells.
$∙$ Guard cells swell when water flows into them, causing the stomatal pore to open. Similarly, pore closes if guard cells shrink.

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The opening and closing of the stomatal pores depends upon :
(a) oxygen (b) water in guard cells (c) temperature (d) concentration of $C O_{2}$ in stomata

(a) How do guard cells regulate opening and closing of stomata! pores ?
(b) Two similar green plants are kept separately in oxygen free containers, one in dark and the other in continuous light. Which one will live longer ? Give reasons.

How do the guard cells regulate opening and closing of stomatal pores? Explain with the help on diagram.

Q. Assertion: Opening and closing of stomata is controlled by guard cells.
Reason: Shrinking of guard cells results in the opening of stomatal pore.

Q. The opening and closing of the stomatal pore depends upon

(a) Oxygen
(b) Temperature
(c) Water in the guard cells

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How do the guard cells regulate opening and closing of stomatal pores?

∙ The opening and closing of stomatal pore is a function of guard cells, and is regulated by the entry of water inside guard cells. ∙ Guard cells swell when water flows into them, causing the stomatal pore to open. Similarly, pore closes if guard cells shrink.

$∙$ The opening and closing of stomatal pore is a function of guard cells, and is regulated by the entry of water inside guard cells.
$∙$ Guard cells swell when water flows into them, causing the stomatal pore to open. Similarly, pore closes if guard cells shrink.