Question

Interveinal chlorosis of younger leaves is a deficiency symptom of

• A. Mg
• B. S
• C. Fe
• D. Cu

Hint:

Iron deficiency causes interveinal chlorosis in younger leaves, while magnesium deficiency affects older leaves first.

Answer 1

The Correct Option is C

Concept:
Nutrient deficiency symptoms depend on whether the nutrient is mobile or immobile in plants.

Step 1: Understand iron mobility.
Iron is an immobile nutrient in plants. Therefore, its deficiency symptoms first appear in younger leaves.

Step 2: Identify the symptom.
Iron deficiency causes: \[ \text{Interveinal chlorosis of younger leaves} \] This means leaf tissue between veins becomes yellow, while veins may remain green.

Step 3: Compare with magnesium.
Magnesium deficiency also causes interveinal chlorosis, but it appears first in older leaves because magnesium is mobile. Therefore: \[ \text{Younger leaf interveinal chlorosis}=\text{Iron deficiency} \] \[ \therefore \text{Correct Answer is (C)} \]