Air pollination damage to plants is characterized by ______

Air pollination damage to plants is characterized by ______

• A. Browning of the leaf margins
• B. Chlorosis on the entire leaf
• C. Brown veins with green edges
• D. Purple blotches near the mid vein

Answer: (A)

Air pollution damage to plants typically shows up as browning along the leaf margins. Pollutants in the air enter the leaf through the stomata and cause oxidative injury, with edge tissue often being the most stressed due to transpiration concentrating the toxins and water loss at the margins. This results in necrotic, browned edges that can expand inward as the damage progresses. Other patterns like whole-leaf yellowing, brown veins with green edges, or purple blotches near the midvein align more with nutrient deficiencies, disease, or other stresses rather than a classic air-pollution injury.

Air pollution damage to plants typically shows up as browning along the leaf margins. Pollutants in the air enter the leaf through the stomata and cause oxidative injury, with edge tissue often being the most stressed due to transpiration concentrating the toxins and water loss at the margins. This results in necrotic, browned edges that can expand inward as the damage progresses. Other patterns like whole-leaf yellowing, brown veins with green edges, or purple blotches near the midvein align more with nutrient deficiencies, disease, or other stresses rather than a classic air-pollution injury.