Interveinal chlorosis in young leaves is most commonly associated with which deficiency?

• A. Iron deficiency
• B. Nitrogen deficiency
• C. Magnesium deficiency
• D. Potassium deficiency

Answer: (A)

Interveinal chlorosis in young leaves points to iron deficiency because iron is essential for chlorophyll production and is relatively immobile in the plant. When iron is lacking, new growth can’t synthesize chlorophyll properly, so the tissue between the veins turns yellow while the veins remain green. This pattern contrasts with nitrogen deficiency, which tends to cause overall yellowing starting in older leaves, since nitrogen moves within the plant from older to newer tissue.