Please tell

Asked by  | 17th Dec, 2008, 09:58: PM

Expert Answer:

Stomata generally opens at day and closes at night. It is due to the enzymatic starch to sugar conversion of the carbohydrates present in the guard cells. In light, the osmotically inactive starch present in the guard cells is hydrolysed to glucose - 1) -Phospate, which is osmotically active. As a result, the osmotic concentration of the guard cells increases, they absorb water from the surrounding cells, become turgid and the stomata opens.

Answered by  | 18th Dec, 2008, 02:40: PM

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