why are the stomata opened during the day and closed at night? I already know the answer but i want someone to answer it more clearly that is with more details. Thanks in advance.
2007-07-02 00:41:30 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Turgid guard cells open the stomata, while flaccid ones close them. The potassium (K+) ion is responsible for the stomatal action. Uptake of K+ causes the cell to become turgid decreasing its water potential.
The stomata open at dawn caused by the light inducing the cells to take in K+. An internal clock (circadian rhythm) will make them open even if in they are kept in the dark.
Guard cells will close due to water deficiency and high temperatures.
2007-07-02 01:54:46 · answer #1 · answered by ATP-Man 7 · 1⤊ 0⤋
The stomata open during the day to allow air exchange for photosynthesis. During the day the guard cells fill with water and swell. This causes the stomata to open. At night the guard cells lose some of this water and return to their original shape. This closes the stomata.
2007-07-02 01:30:19 · answer #2 · answered by physandchemteach 7 · 0⤊ 0⤋
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2016-11-07 22:32:59 · answer #3 · answered by ? 4 · 0⤊ 0⤋