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Glycolate induces opening of stomata in : -
A
Presence of oxygen
B
Low $CO_2$ conc.
C
High $CO_2$
D
$CO_2$ absent
Detailed Solution
According to Zelitch's glycolate theory, glycolic acid is formed in the guard cells during photosynthesis when the $CO_2$ concentration is low (in light).
Glycolate is oxidised, producing ATP, which is used to pump $K^+$ ions into the guard cells. Water then enters, the guard cells become turgid, and the stoma opens.
So glycolate induces opening of stomata at low $CO_2$ concentration.
Glycolate is oxidised, producing ATP, which is used to pump $K^+$ ions into the guard cells. Water then enters, the guard cells become turgid, and the stoma opens.
So glycolate induces opening of stomata at low $CO_2$ concentration.