Question

which physical factor controls the opening and closing of stomatal pore​

Answer 1

The swelling of guard cells due to absorption of water causes opening of stomatal pores while shrinking of guard cells closes the pores. Opening and closing of stomata occurs due to turgor changes in guard cells. When guard cells are turgid, stomatal pore is open while in flaccid conditions, the stomatal aperture.

Answer 2

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Here is your answer...

Answer-

The physical factors that affect opening and closing of stomatal pore are-

• LIGHT- It plays important role in movement of gurad cells.
• WATER- Guard cells derive water from epidermal cells and hence it plays major role in opening and closing of stomatal pore
• TEMPERATURE- Increase in temperature causes stomata to open.
• Mineral elements- Minerals like nitrogen and phosphorus has some effect on stomata.

Hope it helps!☺️