Transpiration · Botany

The 'Wilting Point' of a plant refers to the stage where:

  1. The plant begins to flower and set seed rapidly.
  2. The soil holds more water than the roots can absorb.
  3. The plant halts respiration but continues growing.
  4. Transpiration exceeds the rate of water absorption.
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Correct answer: Transpiration exceeds the rate of water absorption.

Wilting occurs when the plant cells lose turgor pressure. This happens when the water lost through transpiration cannot be replaced quickly enough by the roots from the soil.

Difficulty: Medium Question 14 of 19

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