Explain the opening and closing mechanism in stomata?
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- The mechanism of the closing and opening of the stomata depends upon the presence of sugar and starch present in the guard cells.
- In the presence of light, the guard cells of the stomata contain sugar which is synthesized by their chloroplasts.
- The sugar is soluble and increases the concentration of guard cells.
- Due to higher concentration of the cytoplasm of guard cells, the water enters into these cells from the neighbouring cells by osmosis. Hence, the stomata remains open
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SolutionverifiedVerified by TopprThere are different mechanisms which are responsible for the opening and closing of the stomata. 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. When guard cells are turgid, stomatal pore is open while in flaccid conditions, the stomatal aperture closes. There are other theories which explains the opening and the closing of the stomatal pore.
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