Question

Describe two important functions each of K, Fe and Zn in green plants and also write deficiency symptoms of any two of them.

Answer 1

1. Potassium(K)

Function

• It is required as a cofactor for different enzymes.
  
• Essential for permeability, stomatal movement and for translocation.
  

Deficiency symptoms:

• rosette or bushy habit due to reduced apical bud growth.
  
• decreased resistance to diseases
  

2. Iron (Fe)

Function

• Essential for chlorophyll synthesis.
  
• Helps in energy generation.
  

Deficiency symptoms

• Chlorosis first in young leaves
  
• Inhibition of chloroplast formation
  

3. Zinc (Zn)

Function

• Constituents of carbonic anhydrase and auxin
  

Deficiency symptoms

• Mottled leaves
  
• Decreases auxin content and cause little leaf disease.