Question

Air pollution effects are usually found on
(a) leaves (b) flowers
(c) stems (d) roots

Answer 1

Leaves are directly exposed to air pollutants and effects of air pollution are first seen on leaves. Deposition of particulate matter hampers gaseous exchange and deposition of soot interfere with the capture of sunlight. Sulphur dioxide causes the destruction of chlorophyll and necrosis. Nitrogen oxides cause defoliation, necrosis, dieback and death of plants. Other than this, acid rain damages plant by a direct effect on foliage and growing points by chlorosis, necrosis, defoliation and dieback.

Answer 2

Answer:

Option(a) Leaves is the correct answer.

Effect of air pollution on leaves-

• As a result of direct exposure to air contaminants, leaves are the first to experience their consequences.
• Particulate matter buildup hinders gaseous exchange, while soot buildup obstructs solar absorption.
• Chlorophyll is destroyed by sulphur dioxide, which also results in necrosis.
• Nitrogen oxides are to blame for plant death, necrosis, dieback, and defoliation.
• In addition to this, acid rain harms plants by having a direct impact on the leaves and growth points, causing dieback, necrosis, chlorosis, and defoliation.
• Air pollution hinder the accumulating of resources, which has a detrimental effect on plant growth.
• Numerous air pollutants, including O3 and NOx, interfere with net carbon fixation by the plant canopy and the metabolic function of leaves once they come into contact with the atmosphere.

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