MINERAL SOLUTION
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1.Julius Von Sachs demonstrated solution culture for the first time.
2.Magnesium and phosphorous are a kind of energy related chemical compounds in plants. 3.Purification of water and nutrient salts is important in studies involving mineral nutrition using hydroponics. 4.Nitrogen,phosphorus and sulphur present in plant tissues in excess of 10 mmole/Kg of dry matter and are known as macronutrients. 5.Non essential elements which if absorbed reduce plantv growth andyield are toxic elements. 6.Mineral element nitrogen is required by plants in the greatest amount. 7.K helps to maintain an anion-cation balance in cells ans is involved in protein synthesis. 8.Calcium deficiency causes degeneration of meristems. 9.Molybdenum is a component of nitrogenase and nitrate reductase. 10.The concentation of the essential element below which plant growth is retarded is termed as critical concentration. 11.Deficiency symptoms of N,K,Mg are visible first in senescent leaves. 12.Manganese toxicity inhibits calcium translocation in shoot apex. 13.Yellow edges appear in leaves deficient in K. 14Boron deficiency leads to stout axis. 15.Passive movement of ions into the apoplast occurs through ion-channels the trans-membrane proteins that functions as selective pores. 16.Both macronutrients and micronutrients form components of fertilisers. 17.Nirogen is a limiting nutrient for both natural and agricultural rco-system. 18.Best known symbiotic nitrogen fixing bacteria is Rhizobium leguminosarum. 19.Rhizobium lives in close-association with the plant to provide mineral nutrition. 20.Enzyme nitrogenas require molecular oxygen for its functioning. 21.Ammonia synthesis by nitrogenase requires 8ATP for each NH3 produced. 22.Ureides contain more nitrogen than the amino acids. |
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