Transport In Plants Ques 33
33. Phenyl mercuric acetate (PMA) results in
(a) reduced photosynthesis
(b) reduced transpiration
(c) reduced respiration
(d) killing of plants
Show Answer
Answer : b
Hints & Solutions
(b) Phenyl Mercuric Acetate (PMA) is an antitranspirant. Antitranspirants are compounds applied to the leaves of plants to reduce transpiration without affecting gaseous exchange. They are used on christmas trees, cut flowers, newly transplanted shrubs, and in other applications to preserve and protect plants from drying out too quickly. They have ‘also been reportedly used to protect leaves from salt burn and fungal diseases.
Anti Transpirants are of two types:
33. Metabolic inhibitors
33. Film forming antitranspirants
BETA
