Question

Glycolate induces opening of stomata in

• A. Presence of oxygen
• B. Low CO${}_2$ concentration
• C. High CO${}_2$ concentration
• D. Absence of CO${}_2$

Answer 1

The correct option is B Low CO${}_2$ concentration

Light causes photosynthesis which leads to reduction in concentration of CO${}_2$. Then, glycolate is synthesized. Following the synthesis, oxidation of glycolate occurs. ATP synthesis takes place after the oxidation process. Then, the K${}^{+}$ pump is activated, K${}^{+}$ ions move in the guard cells. Due to this, the water molecules move into guard cells. The guard cells swell which results in opening of stomata. Hence, Glycolate induces opening of stomata. Hence, the correct option is B.