Nutrition in Plants Video Lecture | NCERT Video Summary: Class 6 to Class 12 (English) - UPSC

Ans. Nutrition in plants refers to the process by which plants obtain and utilize nutrients for their growth and development. It involves the intake of essential elements from the soil, absorption of water, and the synthesis of organic substances through photosynthesis.

Ans. Plants obtain nutrients through their root system. The roots absorb water and minerals from the soil through tiny root hairs. These minerals, such as nitrogen, phosphorus, and potassium, are essential for plant growth. Additionally, plants also absorb carbon dioxide from the air to synthesize carbohydrates through photosynthesis.

Ans. Macronutrients are the essential nutrients required by plants in large quantities. They include elements such as nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur. These nutrients are vital for plant growth and play a crucial role in the formation of proteins, enzymes, and chlorophyll. Micronutrients, on the other hand, are required in smaller quantities but are equally important. They include elements like iron, manganese, zinc, copper, molybdenum, boron, and chlorine. Micronutrients are involved in various metabolic processes and are essential for the overall health and development of plants.

Ans. Plants absorb water and nutrients from the soil through their root system. The root hairs, which are tiny projections on the surface of the roots, increase the surface area for absorption. Water moves into the root hairs through osmosis, while nutrients are absorbed through active transport or passive diffusion. The root hairs are in close proximity to the soil particles, allowing the plant to extract water and nutrients. The process is facilitated by the presence of tiny root hairs, mycorrhizal fungi, and the root system's ability to create a concentration gradient for efficient nutrient uptake.

Ans. Photosynthesis is a vital process in plant nutrition as it enables plants to convert sunlight, water, and carbon dioxide into glucose and oxygen. Glucose serves as the primary source of energy for plants, allowing them to carry out various metabolic activities. During photosynthesis, plants utilize the energy from sunlight to synthesize glucose, which is stored as starch or used for growth and other plant functions. Oxygen, a byproduct of photosynthesis, is released into the environment, contributing to the oxygen levels in the atmosphere. Thus, photosynthesis plays a crucial role in providing the energy and organic compounds necessary for plant nutrition and survival.