Name atleast live different deficiency symptoms in plants. Describe them and correlate them with the concerned mineral deficiency.
Answers
The five main deficiency symptoms arising in plants are:
• Chlorosis
• Necrosis
• Inhibition of cell division
• Delayed flowering
• Stunted plant growth
Chlorosis or loss of chlorophyll leads to the yellowing of leaves. It is caused by the deficiencies of nitrogen, potassium, magnesium, sulphur, iron, manganese, zinc, and molybdenum.
Necrosis is the death of plant tissues as a result of the deficiencies of calcium, magnesium, copper, and potassium.
Inhibition of cell division is caused by the deficiencies of nitrogen, potassium, sulphur, and molybdenum.
Delayed flowering is caused by the deficiencies of nitrogen, sulphur, and molybdenum.
Stunted plant growth is a result of the deficiencies of copper and sulphur.
Answer:
Chlorosis: Loss of chlorophyll leading to the yellow colouration of the leaves. It is caused by the deficiency of N,
K, Mg, S, Fe, Mn, Zn and Mo.
Necrosis: It is the death of leaf tissue due to deficiency of Ca, Mag, Cu,K. It is the killing of cells expressed in the form of leaf spots, rots and blights.
Inhibition of cell division: deficiency in Mo, N, K and S causes inhibition of Cell division. They are expressed in stunted growth
Delay in flowering: In some plants it is caused due to low concentration of N, S and Mo.
Deformation – It is caused due to deficiency of boron. Deformation, disorganization, discolouration of the meristematic tissue and ultimately death of a growing plant.