Transcription of CHAPTER 12 INERAL NUTRITION
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CHAPTER 12 INERAL NUTRITION
194 BIOLOGYThe basic needs of all living organisms are essentially the same. Theyrequire macromolecules, such as carbohydrates, proteins and fats, andwater and minerals for their growth and CHAPTER focusses mainly on inorganic plant NUTRITION , whereinyou will study the methods to identify elements essential to growth anddevelopment of plants and the criteria for establishing the will also study the role of the essential elements, their major deficiencysymptoms and the mechanism of absorption of these essential CHAPTER also introduces you briefly to the significance and themechanism of biological nitrogen TO STUDY THE MINERAL REQUIREMENTS OF PLANTSIn 1860, Julius von Sachs, a prominent German botanist, demonstrated,for the first time, that plants could be grown to maturity in a definednutrient solution in complete absence of soil. This technique of growingplants in a nutrient solution is known as hydroponics. Since then, anumber of improvised methods have been employed to try and determinethe mineral nutrients essential for plants.
the major constituents of proteins, nucleic acids, vitamins and hormones. Phosphorus: Phosphorus is absorbed by the plants from soil in the form of phosphate ions (either as H PO 2 4 − or HPO 4 2−). Phosphorus is a constituent of cell membranes, certain proteins, all nucleic acids and nucleotides, and is required for all phosphorylation ...
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