Mineral Nutrition Flashcards
Founder of hydroponics
Julius Von Sachs 1860
The technique of growing plant in nutrient solution instead of soil is known as
Hydroponics
Number of essential elements
17
Elements on the basis of the quantity
Macronutrients and micronutrients
Examples of macronutrients
Carbon , hydrogen, oxygen, nitrogen, phosphorus, sulphur, potassium, calcium and magnesium
E.g. of micronutrients
Fe, Mg, Cu,
Mo, Zn, B,
Cl, Ni
E.g. for beneficial elements
Sodium,
Silicon,
Cobalt,
Selenium
Elements components of bio molecule and stir elements of cells
C, H, O, N
Elements as energy related chemical compounds
Mg in chlorophyll and P in ATP
Elements which alter osmotic pressure
K plays an imp role in opening and closing of stomata
Mg acts as an activator of
Ribulose biphosphate carbolase -oxygenase
Phosphanol pyruvate carboxylase
The concentration of the essential element below which plant growth is retarded
Critical concentration
Moderate decrease in nutrients causes
Deficiency
Moderate increase in nutrients causes
Toxicity
Loss of chlorophyll
Chlorosis
Death of tissues
Necrosis
Chlorosis can lead to
Yellowing of leaves
E.g. of toxicity
Manganese toxicity
The movement of ions in a cell
Flux
Inward movement of ions into the cell
Influx
The entry of ions to and from the symplast
Require energy ,
Active process
Decomposition of organic nitrogen of dead plants and animals is known as
Ammonification
Ammonia is oxidised to nitrite by
Nitrosomonas and Nitococcus
Nitrite is further oxidised to nitrate with the help of which bacteria
Nitrobacter
