Q. Stomatal movement is not affected by :
(a) Temperature
(b) Light
(c) O2 concentration
(d) CO2 concentration
Solution :
Correct Option : C The stomatal movement mainly depends on the following factors: 1.Light: stomata open in light and close in darkness. Light intensity also affects the stomatal movement. Stomata open in low intensity. 2. Temperature: Stomata can open at 30−400C. 3.CO2 concentration: Stomata open at low concentration and close at high concentration. 4. Water availability: Underwater stress condition stomata get close due to ABA hormone. Whereas concentration of oxygen does not have a great impact on stomatal movement. Thus, the correct answer is option C.
