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Opening and closing depend on potassium ion exchange theory |
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Answer» Guard cells are cells surrounding each stoma. They HELP to regulate the rate of transpiration by opening and closing the stomata. ... Notice that in figure A the guard cells are turgid, or swollen, and the stomatal opening is large. This turgidity is CAUSED by the ACCUMULATION of K+ (POTASSIUM ions) in the guard cells. |
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