2022-10-29 15:04:51
Role of nutrients and their deficiency Symptoms Nitrogen Impart green colour to plant encourages vegetative growth
Nitrogen is essential constituent of protein
Constituent of Protoplasm of chlorophyll and coenzyme.
Play important role in
synthesis of auxin
Deficiency Lower leaves become yellow and dries.
V shaped chlorosis on older leaves or yellowing at tip.
Disease Starvation disease due to nitrogen deficiency.
Buttoning in cauliflower.
Phosphorous Increase the disease resistance.
Enhance new cell formation and necessary for root development.
Required for grain formation and maturity of grains.
Phosphorus is essential constituent for nucleic acid and phytin.
Most essential functions are energy storage and transfer energy act as "energy currency".
Deficiency Due to deficiency of single element the life cycle of plant can't be completed hence (Agricultureexamslibrary) Phosphorus is called " key of life "
Deficiency imparts dark green colour in leaves.
Later develops red purple coloration.
Disease Sickle leaf diseases.
Potassium Most essential function of K+ is stomata regulation.
Provides disease resistance in plants.
Cofactor for enzymes.
Formation and translocation of Sugars.
Helps in chlorophyll formation.
Deficiency Spot of dead tissue at tips.
Scorching and burning on margins of autumn leaves.
Disease Rottle/ dieback disease.
Calcium It is constituent of cell wall
Calcium is a mobile in plants and deficiency symptoms appear on Meristem tip portion.
Deficiency Terminal bud die
Disease Tip hooking.
Blossom end rot of tomato(BER).
Popping in groundnut.
Magnesium Essential constituent of chlorophyll.
Magnesium is a constituent of chlorophyll.
Chlorosis between veins.
Disease Sand -drown disease of tobacco.
Sulphur Sulphur oxidizing Bacteria is Thiobacillus.
Sulphur is essential for oil seed and pulses because it improves oil content and protein content in oil seeds and pulses, respectively.
Disease Akiochi disease of rice due to Excess of hydrogen sulphide.
Tea yellow disease of tea.
Iron Fe is the component of nitrate reductase.
Required for nitrogen fixation.
During respiration act as O2 carrier.
Deficiency Interveinal complete chlorosis.
Scorching of leaf margin.
Yellowing of iron chlorosis in groundnut.
Manganese Formation of chlorophyll.
Co-factor of enzyme.
Mn toxicity causes crinckle leaf of cotton.
Deficiency Dead spot on leaves.
Desease Marsh spot of pea.
Pahala blight of sugarcane.
Copper Compound of plastocyanin.
Essential for photosynthesis/ respiration.Agriexams library
Dieback and reclamation disease of cereals.
Boron Necessary for Pollen germination.
Boron is the only non-metal element among the micronutrient.
It is necessary for translocation of Sugars and is involved in reproduction and germination of pollen.
Disease : due to deficiency Browning of cauliflower is caused by Boron deficiency.
Top sickness of tobacco.
Fruit cracking of tomato.
Hard fruit of citrus.
Hen and chick disease of grape.
Zinc In plants it is required for biosynthesis of hormones.
Zn deficiency causes-
-White bud of maize.
-Khaira disease of rice.
-Little leaf of cotton.
-Mottled leaf of citrus.
-Rosette formation.
Cobalt It is component of Vitamin B
It is essential for formation of type of hemoglobin in N-fixing nodule tissue known as leghaemogloin.
Act as O2 carrier in roots.
Also known as animal protein factor.
Molybdenum Mo: absorbed as molybdate MoO4-2 forms.
Mo is important component of enzyme: Nitrate reductage.
N-fixation in pulses.
Whiptail of cauliflower is due to deficiency of Mo.
Mo is required for carrot & raphanus for sweetness.
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