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  4. Assertion: Nutrients are required by plants for the synthesis of protoplasm and act as source of energy. Reason: Water provides the medium for enzymatic activities needed for growth.

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Q. Assertion : Nutrients are required by plants for the synthesis of protoplasm and act as source of energy.
Reason : Water provides the medium for enzymatic activities needed for growth.

Plant Growth and Development

Solution:

Nutrients are raw materials required for synthesis of protoplasm as well as source of energy. Nutrients should be rich in nitrogenous components for increased synthesis of protoplasm and carbohydrates for energy and cell wall synthesis. All types of micronutrients and macronutrients should be available for proper growth. Water is required for cell elongation, maintenance of turgidity of growing cells and providing medium for enzyme action. Even slight deficiency of water reduces growth. It may, however, promote differentiation. Water stress completely stops growth.