Riya 7 Questions 1 Answer 0 Best Answers 102 Points View Profile 7 Riya Asked: November 9, 2019In: Class 10 How do the guard cells regulate opening and closing of stomatal pores? 7 Answers cbseclass 10ncertscience Share Facebook 2 Answers Voted Oldest Recent Amit Sharma 15 Questions 80 Answers 16 Best Answers 668 Points View Profile Amit Sharma Added an answer on November 9, 2019 at 2:32 pm 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 closes. 2 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp yogeshsharma 0 Questions 91 Answers 21 Best Answers 398 Points View Profile Best Answer yogeshsharma Added an answer on June 16, 2021 at 10:46 am Opening and closing of stomata occurs due to turgor changes in guard cells. Moreover guard cells have differentially thickened walls i.e., outer walls are thin and inner walls are thick. Absorption of water causes guard cells to swell up and get curved out resulting in the opening of stomatal pore whereas during flaccid condition, shrinking of guard cells takes places that causes closure of stomatal pore. 1 Reply Share Share Share on Facebook Share on Twitter Share on LinkedIn Share on WhatsApp Leave an answerLeave an answerCancel reply Click on image to update the captcha. Save my name, email, and website in this browser for the next time I comment.