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Which of the following facilitates opening of stomatal aperture?

  1. A
    Decrease in turgidity of guard cells
  2. B
    Radial orientation of cellulose microfibrils in the cell wall of guard cells
  3. C
    Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
  4. D
    Contraction of outer wall of guard cells

Solution & Step-by-step Explanation

Cellulose microfibrils are oriented radially rather than longitudinally, making it easier for the guard cells to expand outwards and open the stoma when they become turgid.

Practice this question

Try it yourself before checking the explanation above.

Which of the following facilitates opening of stomatal aperture?
A
Decrease in turgidity of guard cells
B
Radial orientation of cellulose microfibrils in the cell wall of guard cells
C
Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
D
Contraction of outer wall of guard cells

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Plant PhysiologyTransport in PlantsStomata

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