Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following. [NEET 2019]
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Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following. [NEET 2019]
✓ Correct answer: c) Flaccidity of bulliform cells
ExplanationGrass leaves have bulliform cells (also called motor cells) located in grooves on the upper epidermis of the leaf.These cells are large and thin-walled and play a role in water conservation.During dry weather, water loss causes these bulliform cells to become flaccid.This loss of turgor pressure causes the leaf to curl inward, reducing the surface area exposed to sunlight and air, thereby minimizing water loss through transpiration.
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