Mineral Nutrition

Plants need a balanced set of essential elements for normal growth and reproduction. These are grouped into macronutrients and micronutrients according to quantity required, not importance.

Nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur are major examples, while iron, zinc, manganese, boron, copper, molybdenum, chlorine, and nickel are common micronutrients.

Hydroponics helped establish essentiality by allowing nutrient omission experiments. Deficiencies may produce chlorosis, necrosis, stunted growth, poor flowering, or tissue damage.

A very important NEET idea is nutrient mobility: mobile elements show symptoms first in older leaves, while relatively immobile elements show them in younger tissues.

Plants usually absorb nitrogen as nitrate and ammonium. Atmospheric nitrogen becomes usable through nitrogen fixation, while microbes also perform nitrification, ammonification, and denitrification.

Rhizobium in legume nodules and leghemoglobin are among the most tested NEET points from this chapter.

Absorbed nitrate is reduced before being incorporated into amino acids. Plants then use these amino acids to synthesize proteins and other biomolecules.

NEET commonly tests mineral roles such as magnesium in chlorophyll, phosphorus in ATP, potassium in guard cell regulation, and molybdenum in nitrate reductase.

Mineral Nutrition works best as one connected story: soil supply, microbial conversion, root uptake, plant assimilation, and deficiency expression are all linked. The highest-yield pillars are essentiality, deficiency, mobility, and nitrogen metabolism.