Theory of photosynthesis for opening and closure of stomata
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it caused by the green pigment of leaf
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There are two theories about the opening and closing of stomata:
- Potassium ion concentration theory
- Sugar concentration theory
Potassium ion concentration theory:
This is the recent theory in which ATP is used to actively pump the potassium ions of the adjacent cells into the guard cells.
Sugar concentration theory:
This the old theory in which the guard cells become turgid and bulbs out words due to their thin outer wall, thus widening the stomatal opening lying in between.
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