A) Influx of potassium ions
B) Efflux of potassium ions
C) Influx of hydrogen ions
D) Influx of calcium ions
Correct Answer: A
Solution :
During day time, due to photosynthesis, malic acid forms which breaks to\[{{H}^{+}}\] and malate.\[{{H}^{+}}\] ions move out of guard cells and\[{{K}^{+}}\]ions enter forming potassium malate, which makes guard cells turgid and stomata opens.
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