NEET · BiologyHard
During the process of stomatal opening, which sequence of events correctly describes the change in guard cell physiology?
- A.K+ influx, decrease in solute potential, water influx, increase in turgor pressure
- B.K+ efflux, increase in solute potential, water efflux, decrease in turgor pressure
- C.H+ influx, increase in solute potential, water influx, increase in turgor pressure
- D.K+ influx, increase in solute potential, water efflux, decrease in turgor pressure
Show correct answer & step-by-step solution
Correct answer: A — K+ influx, decrease in solute potential, water influx, increase in turgor pressure
Solution
- Active transport of ions into guard cells occurs.
- This accumulation lowers the solute potential () of the guard cells.
- Water potential decreases, causing water to enter the cells via osmosis.
- Increased turgor pressure causes the guard cells to expand and open the stoma.
- Hence the answer is (A).
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