Deficiency Symptoms and Correction · NCERT Biology

If a plant shows interveinal chlorosis only in its older leaves, the most likely deficient element is:

  1. Iron
  2. Manganese
  3. Magnesium
  4. Calcium
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Correct answer: Magnesium

Magnesium is a mobile element and the central atom of chlorophyll. When it is scarce, it is moved from older leaves to younger ones, causing interveinal chlorosis in the older leaves first.

Difficulty: Medium Question 17 of 19

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