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Mineral Nutrition In Plants in One Shot (Old NCERT) Video Lecture | One-Shot Videos for NEET
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| 1. What is mineral nutrition in plants? |  |
Ans. Mineral nutrition in plants refers to the process through which plants obtain essential minerals from the soil and use them for various physiological functions. These minerals, including nitrogen, phosphorus, potassium, calcium, and magnesium, are required in specific quantities for the growth and development of plants.
| 2. How do plants absorb minerals from the soil? | |
Ans. Plants absorb minerals from the soil through their root systems. The root hairs present on the surface of the roots increase the surface area for absorption. The minerals dissolve in the soil water and enter the root hairs through the process of active transport. From the root hairs, these minerals are transported to various parts of the plant through the xylem vessels.
| 3. What are the functions of essential minerals in plants? | |
Ans. Essential minerals play vital roles in plant growth and development. Some key functions of these minerals include:
- Nitrogen (N): It is essential for the synthesis of proteins, enzymes, and chlorophyll.
- Phosphorus (P): It is involved in energy transfer and storage, as well as DNA and RNA synthesis.
- Potassium (K): It regulates osmotic potential, enzyme activation, and photosynthesis.
- Calcium (Ca): It is essential for cell wall formation, membrane permeability, and enzyme activation.
- Magnesium (Mg): It is a constituent of chlorophyll and plays a crucial role in photosynthesis.
| 4. What are the symptoms of mineral deficiencies in plants? | |
Ans. Mineral deficiencies in plants can lead to visible symptoms, indicating their importance. Some common symptoms of mineral deficiencies include:
- Nitrogen deficiency: Yellowing of older leaves (chlorosis) and stunted growth.
- Phosphorus deficiency: Dark green or purple leaves, delayed flowering, and poor root development.
- Potassium deficiency: Yellowing and curling of leaf margins, weak stems, and reduced fruit size.
- Calcium deficiency: Stunted root growth, distorted leaves, and blossom-end rot in fruits.
- Magnesium deficiency: Interveinal chlorosis in older leaves, leaf curling, and reduced growth.
| 5. How can mineral deficiencies be corrected in plants? | |
Ans. Mineral deficiencies in plants can be corrected through various methods, such as:
- Fertilization: Applying fertilizers containing the deficient mineral to the soil can supply the required nutrients to the plants.
- Foliar spray: Spraying a solution of the deficient mineral directly on the leaves can provide a quick supply of the nutrient.
- Soil amendment: Adding organic matter or mineral-rich substances to the soil can improve its nutrient content and alleviate deficiencies.
- pH adjustment: Adjusting the soil pH to the optimal range for nutrient availability can enhance nutrient uptake by plants.
- Crop rotation: Rotating crops with different nutrient requirements can help prevent the depletion of specific minerals in the soil.
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Nov 15, 2024 Last updated |
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