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NEET2015BotanyTransport in PlantsActual

Which one gives the most valid and recent explanation for stomatal movements?

Options

  1. ATranspiration.
  2. BPotassium influx and efflux.
  3. CStarch hydrolysis.
  4. DGuard cell photosynthesis.

Correct answer

B. Potassium influx and efflux.

Step-by-step solution

The most recent & valid explanation of stomatal movements is given by potassium influx & efflux/potassium ion pump theory which is also as the modern theory. The theory was given by Levitt in 1974. This theory states that the accumulation K+ ions leads to opening of stomata during the day while the reverse situation prevails during dark when the stomata are closed.

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