Question

Stomatal opening is affected by

• A. Nitrogen concentration, carbon dioxide concentration and light.
• B. Carbon dioxide concentration, temperature and light.
• C. Nitrogen concentration, light and temperature.
• D. Carbon dioxide concentration, nitrogen concentration and temperature.

Answer 1

The correct option is B Carbon dioxide concentration, temperature and light.

Stomatal opening is affected by carbondioxide concentration light and temperature. Increase in the temperature causes stomata to open. Low $C{O}_2$ concentration induces stomatal opening and vice versa. Stomata open in the presence of light and close in darkness.