Stomatal opening is affected by

Options

A. nitrogen concentration, carbon dioxide concentration and light
B. carbond dioxide concentration, temperature and light
C. nitrogen concentration, light and temperature
D. carbon dioxide concentration, nitrogen concentration and temperature

Answer

B

Explanation

Carbon dioxide is an effective antitranspirant. A little rise in `CO_(2)` concentration induces partial closure of stomats. Light affects the rate of transpiration in two ways firstly by controlling the stomatal opening and secondly by affecting the temperature. Increase in temperature increases the rate of transpiration.