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Why is that in certain plants deficiency symptoms appear first in younger parts of the plant while in others they do so in mature organs - CBSE (Science) Class 11 - Biology

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Question

Why is that in certain plants deficiency symptoms appear first in younger parts of the plant while in others they do so in mature organs?

Solution

Deficiency symptoms are morphological changes in plants, indicating nutrient deficiency. Deficiency symptoms vary from one element to another. The plant part in which a deficiency symptom occurs depends on the mobility of the deficient element in the plant. Elements such as nitrogen, potassium, and magnesium are highly mobile. These elements move from the mature organs to the younger parts of a plant. Therefore, the symptoms for the deficiencies of these elements first appear in the older parts of the plant. Elements such as calcium and sulphur are relatively immobile. These elements are not transported out of the older parts of a plant. Therefore, the symptoms for the deficiencies of these elements first appear in the younger parts of the plant.

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APPEARS IN

 NCERT Solution for Biology Textbook for Class 11 (2018 to Current)
Chapter 12: Mineral Nutrition
Q: 6 | Page no. 205
Solution Why is that in certain plants deficiency symptoms appear first in younger parts of the plant while in others they do so in mature organs Concept: Essential Mineral Elements - Deficiency Symptoms of Essential Elements.
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