Opening of stomata does not affected by $\mathbf{N}_{\mathbf{2}}$(nitrogen). $N_{2}$ is present in free state in atmosphere/air, which is used in nitrogen fixation by some important bacteria but does not affect the opening and closing of stomata.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.