2022-08-17 05:14:15
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 colourration.
#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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