‘Nitrogen Fixer’ under my Foldscope.

These are the nitrogen fixer Cyanobacteria (Blue green algae) under order Nostocales. They have this ability due to a specialized cell, known as Heterocyst.

  • Heterocyst identification key Features with respect to vegetative cells.
  • Thick walled.
  • Weak pigmentation.
  • Present at both intercalary and terminal position.
  • Intercalary Heterocyst have Polar granules at each pole while Terminal Heterocyst have polar granule at single pole.
  • Neither divide nor Dedifferentiate.
  • Fix nitrogen under Aerobic condition.

Images showing Heterocyst cells.

2 Comments Add yours

  1. edurafi says:

    Stunning pictures!

    1. Rahul negi says:

      Thanks for commenting.

Leave a Reply