Question : Stomatal movements are influenced by a number of environmental factors, Which of the following statements is //are incorrect regarding this? (ii)Blue light keeps stomata open during the day pormoting the movement of K_(+) ions into guard cells. (ii) Increased CO_(2) concentraation reduces the pH of guard cells which promotes conversion of sugar into starch ultimately causing closure of stomata. (iii) Abscisic acid under stress conditions, causes repid movement of K_(+) ions into guard cells. Highly concentratedsucrose or salt solution when applied over to stomata results in stomata opening.

Question : Stomatal movements are influenced by a number of environmen

1.	Question : Stomatal movements are influenced by a number of environmental factors, Which of the following statements is //are incorrect regarding this? (ii)Blue light keeps stomata open during the day pormoting the movement of K_(+) ions into guard cells. (ii) Increased CO_(2) concentraation reduces the pH of guard cells which promotes conversion of sugar into starch ultimately causing closure of stomata. (iii) Abscisic acid under stress conditions, causes repid movement of K_(+) ions into guard cells. Highly concentratedsucrose or salt solution when applied over to stomata results in stomata opening.
Answer» `(i)` and `(II)` `(iii)` and `(iv)` `(iii)`only `(iv)` only SOLUTION :Abscisic acid `(ABA)`, is called as stress hormone as it causes closing of stomata under water stress conditions by causing rapid MOVEMENT of `K^(+)` IONS out of the guard cells. HIGHLY concentrated sucrose `//`salt solution results in stomatal closure.