Transport in Plants Question 42
42. Stomata of a plant open due to
[2003]
(a) influx of calcium ions
(b) influx of potassium ions
(c) efflux of potassium ions
(d) influx of hydrogen ions
Show Answer
Answer : b
Hints & Solutions
(b) During day time, due to photosynthesis, malic acid forms, which breaks into $H^{+}$and malate. $H^{+}$ions move out of guard cells and $K^{+}$ions enter forming potassium malate which makes guard cells turgid and stomata opens.
