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  • Identify the role of lectins in formation of root nodules in legumes.  Option: 1 Formation of Shepherd’s crook  </d

Identify the role of lectins in formation of root nodules in legumes.
 

Option: 1

Formation of Shepherd’s crook
 


Option: 2

Recognition of compatible Rhizobium by host
 


Option: 3

Formation of peri bacterial membrane
 


Option: 4

Formation of infection thread
 


Answers (1)

best_answer

 

 

 

  • A variety of microorganisms exist in the rhizosphere (i.e. immediate vicinity of roots) of host root.
  • The roots of young leguminous plants secrete a group of chemical attractants like flavonoids and betaines.
  • In response to these chemical attractants, specific rhizobial cells migrate towards the root hairs and produce nod (nodulation) factors. 
  • The nod factors found on the bacterial surface bind to the lectin proteins present on the surface of root hairs. This lectin-nod factor interaction induces growth and curling of root hairs around Rhizobia.

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 Lectins are important for recognition of compatibility of Rhizobium by the host plant. Hence, the correct answer is option b.

 

Posted by

manish painkra

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