Question

what is the function of heterocyst

Answer 1

Heterocysts are pale-yellow, thick-walled, and differentiated cells that carry out the process of nitrogen-fixing in cyanobacteria.

What are heterocysts?

• Morphologically, heterocysts are special cells that are found in cyanobacteria.
• These are formed due to the lack of nitrogen-rich sources in the atmosphere and are bigger than the vegetative cells.
• In heterocysts, nitrogen fixation occurs as they create a micro-anaerobic environment where it takes place under aerobic conditions.
• All the heterocysts are made up of thick-walled cells where nitrogen fixation takes place in the presence of the nitrogenase enzyme.
• In heterocysts only photosystem I take place and it lacks photosystem II.

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