Multiple choice

Which of the following nutrients increases drought tolerance in plants?

  1. Magnesium

  2. Calcium

  3. Sulphur

  4. Potassium

  5. Phosphorus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Potassium regulates the opening and closing of the stomata by a potassium ion pump. Since stomata are important in water regulation, potassium reduces water loss from the leaves and increases drought tolerance.

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