Question
Biology Question on Transport in Plants
Phenyl mercuric acetate (PMA) results in
A
reduced photosynthesis
B
reduced transpiration
C
reduced respiration
D
killing of plants.
Answer
reduced transpiration
Explanation
Solution
Phenyl mercuric acetate (PMA) results in reduced transpiration. PMA is an antitranspirant. These are some chemicals whose limited application on the leaf surface reduces or checks transpiration. A good antitranspirant increases leaf resistance but does not affect the mesophyll resistance.