Question

Stomatal opening is affected by____
A. Nitrogen concentration,carbon dioxide concentration and light.
B. dioxide concentration, temperature, and light.
C. Nitrogen concentration, light, and temperature.
D.Carbon dioxide concentration, nitrogen concentration, and temperature.

Answer 1

Stomatal opening allows the passing of carbonic acid gas concentration, temperature, and light. A rise in temperature causes stomata to open. A decrease in the level of greenhouse emission concentration makes the stomata open and visa-versa. During daytime stomata open and during dark it closes.

Step by step answer: Stomata are unit small pores present in the stratum cells of the leaves. They open in the daytime and close during the night. They need carbonic acid gas throughout the day for chemical action. Also, they remove excess water out through the rpocess of respiration throughout the night beside carbonic acid gas.)This pore and closing of stomata is controlled by the concentration of solutes present into the guard cell.
Thus,the correct answer is(B).

Additional Information: During daytime pH of guard cells is basic this leads to a chemical reaction with water. Solutes from neighboring stratum and mesophyll cells enter to guard cells and lower the diffusion potential and water potential of guard cells.

Note: At night, carbonic acid gas accumulates within the guard cells. Hence, it becomes acidic. The acidic pH supports the formation of starch into guard cells.