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NTA Abhyas NEET2020BotanyTransport in PlantsPractice

Which ion helps in opening and closing of stomata?

Options

  1. AM n +
  2. BM g 2 +
  3. CC a 2 +
  4. DK +

Correct answer

D. K +

Step-by-step solution

According to active K + theory of Levitt, opening of stomata occurs due to influx of K + into guard cells. The source of K + ions are nearby subsidiary and epidermal cells. The stomatal closure is considered to be brought about by exertion of K + a n d C l - from the guard cells to epidermal tissue.

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