Discuss opening and closing stomata 3 marks ans
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When the guard cells are swelled because of water absorption, it leads to opening of the stomatal pores. Once the water is lost, the guard cells become flaccid and the stomata closes. Also, during the daytime stomata generally remain open and during the night they remain closed.
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The opening and closing depends upon the turgor pressure in the guard cells. The swelling of guard cells due to absorption of water causes opening of stomatal pores while shrinking of guard cells closes the pores. Opening and closing of stomata occurs due to turgor changes in guard cells.
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