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Various forms and function of essential nutrients- Nitrogen- required by plants in greatest amount, it is absorbed by plants as NO2–, NO3– and NH4+ . It is one of the major constituent of proteins, nucleic acids and vitamins. Phosphorus- Absorbed by plants from soil in the form of phosphate ions. It is the constituent of cell membrane. All nucleic acids and nucleotides require phosphorus. Potassium – absorbed as potassium ions (K+). Help to maintain cation-anion balance in cells. It is involved in protein synthesis, opening and closing of stomata. Calcium – absorbed by plants from soil in form of Calcium ions (Ca2+). Used in synthesis of cell wall. It activates certain enzymes. Magnesium- absorbed by plants in form of Mg2+ ions. It activates the enzymes for respiration, photosynthesis, and involved in synthesis of DNA and RNA. It is constituent of chlorophyll. Sulphur- plants obtain sulphur in form of sulphate (SO42-). Present in amino acids (cysteine, methionine) and is main constituent of coenzymes and vitamins. Iron- obtained in the form of ferric iron (Fe3+). It is important constituent of protein involved in transport system. Manganese-absorbed in form of Mn2+ ions. Main function is splitting of water to liberate Hydrogen and Oxygen during photosynthesis. Zinc-obtained as Zn2+ ions. Activate enzymes like carboxylases. Needed in formation of Auxin. Copper –absorbed as cupric ions(Cu2+). Involved in various metabolic activities and redox reactions. Boron-absorbed as BO33- or B4O72- ions. Required for uptake of calcium, cell elongation and pollen germination. Chlorine – it is absorbed in form of Cl– ions. Determine the solute concentration and splitting of water during photosynthesis ➵ Click Here To Join Our Main Channel

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