These MP Board Class 11th Biology Notes for Chapter 12 Mineral Nutrition help students to get a brief overview of all the concepts.
MP Board Class 11th Biology Notes Chapter 12 Mineral Nutrition
→ Mineral elements which are necessary for the growth of plants are called essential elements.
→ Mineral elements which are required in very small amounts are called trace elements.
→ Mineral elements which are usually radioactive and are used to trace out some metabolic processes are called tracer elements.
→ Mineral elements are absorbed in molecular form.
→ The necessity of a particular element can be tested by growing plants in soilless or solution culture (hydroponics).
→ Soilless culture or water culture of plants is known as hydroponics.
→ The deficiency of Mg results in the inhibition of chlorophyll synthesis.
→ Mn, B, Zn, Cu, Mo, and Cl are the micro or trace elements.
→ Premature leaf fall is caused due to deficiency of phosphorus.
→ Mg and Fe is necessary for chlorophyll synthesis.
→ Osmosis was first discovered by Nollet in 1748, using pigs bladder as a membrane filled with alcohol.
→ N, S, P, Mg, K are some very important macronutrients needed for the metabolic activities of plants, Zn, Cu, Fe, Mn, B, Mo are some of the micronutrients essential for the plant and are mainly catalytic in function.
→ Active absorption of molecules and ions requires metabolic energy and also a carrier molecule.
→ Root hair absorb only capillary water of the soil.
→ The molybdenum (Mo) is a metal activator of the enzyme nitrate reductase.
→ Deficiency of molybdenum causes whiptail disease in Cauliflower and also inhibits the flow-ering.
→ Coenzyme A, vitamin, thiamine and biotin are sulphur containing compounds.
→ Leghaemoglobin is a pink coloured pigment found in the root nodules of leguminous plants.
→ Bacterium Rhizobium is found in the root nodules of leguminous plants. It can fix atmospheric nitrogen in presence of leghaemoglobin.
→ Dionaea is an insectivorous plant.
→ Ringing or girdling experiment was done for the first time by Curtis (1925).
→ Organic compounds are translocated through phloem while inorganic compounds and water molecules are translocated through lumen of xylem.
→ Electroosmotic theory of translocation of organic solutes was proposed by Fenson (1957) and Spanner (1958).
→ Mass flow hypothesis for translocation of organic solutes was proposed by Munch (1930).
→ Protoplasmic streaming or cytoplasmic streaming theory of translocation of organic solutes was proposed by de Vries (1885).
→ The organic food formed by leaves is transported in the form of sucrose.