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NEET 2017
Exam
NEET
Year
2017
Subject
Botany
Chapter
Transport in Plants

NEET 2017 · Botany · Transport in Plants

Which of the following facilitates opening of stomatal aperture?

Which of the following facilitates opening of stomatal aperture?

Options

  1. AContraction of outer wall of guard cells
  2. BDecrease in turgidity of guard cells
  3. CRadial orientation of cellulose microfibrils in the cell wall of guard cells
  4. DLongitudinal orientation of cellulose microfibrils in the cell wall of guard cells

Correct answer

C. Radial orientation of cellulose microfibrils in the cell wall of guard cells

Step-by-step solution

Cellulose microfibrils are oriented radially rather than longitudinally which makes easy for the stoma to open. Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells, decrease in turgidity of guard cells, contraction of the outer wall of guard cells affect the mechanism of opening and closing of stomata.
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