The inner wall of a guard cell (facing the stomatal pore) is thick and inelastic, while the outer wall is thin and elastic. When turgor pressure increases in the guard cells, which of the following mechanical mechanisms directly causes the pore to open?

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Biology · Plant Physiology

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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The thin outer wall bulges outward, pulling the thick inner wall along with it and causing the cell to curve away from the pore

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Answer 1

The thick inner wall contracts actively, pulling the guard cells apart at the pore

Answer 2

The thin outer wall bulges outward, pulling the thick inner wall along with it and causing the cell to curve away from the pore

Answer 3

Both walls expand equally, pushing the adjacent epidermal cells aside to create a gap

Answer 4

The inner wall dissolves temporarily under high osmotic pressure

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