Question

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

Answer 1

Answer: (B)

Cellulose microfibrils are oriented radially rather than longitudinally which makes easy for the stoma to open.