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Solution - All Elements that Are Present in a Plant Need Not Be Essential to Its Survival’. Comment - Introduction of Mineral Nutrition

ConceptIntroduction of Mineral Nutrition

Question

All elements that are present in a plant need not be essential to its survival’. Comment.

Solution 1

Most of the mineral elements present in the soil enter plants through roots but all of these may not be essential for their survival. Some are absorbed and accumulated by plant only because they are present in excess amount. For example plants growing near nuclear test sites take up strontium, even though it is not required by them. Thus, an essential element is that which is necessary for supporting normal growth and reproduction, its requirement must be specific i.e. its deficiency cannot be met by supplying other element and it must be directly involved in the metabolism of plant

Solution 2

Plants tend to absorb different kinds of nutrients from soil. However, a nutrient is inessential for a plant if it is not involved in the plant’s physiology and metabolism. For example, plants growing near radioactive sites tend to accumulate radioactive metals. Similarly, gold and selenium get accumulated in plants growing near mining sites. However, this does not mean that radioactive metals, gold, or selenium are essential nutrients for the survival of these plants

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APPEARS IN

NCERT Biology Textbook for Class 11
Chapter 12: Mineral Nutrition
Q: 1 | Page no. 205

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Reference Material

Solution for question: All Elements that Are Present in a Plant Need Not Be Essential to Its Survival’. Comment concept: Introduction of Mineral Nutrition. For the courses CBSE (Arts), CBSE (Commerce), CBSE (Science)
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