Innovations in Biotechnology and Medical Sciences

Species in news: Henneguya Salminicola


From UPSC perspective, the following things are important :

Prelims level : Henneguya Salminicola

Mains level : NA



Researchers at Tel Aviv University have discovered a non-oxygen breathing animal, which significantly changes one of science’s assumptions about the animal world — that all animals use aerobic respiration and therefore, oxygen.

Henneguya Salminicola

  • The organism is Henneguya salminicola, a fewer-than-10-celled microscopic parasite that lives in salmon muscle.
  • It relies on anaerobic respiration (through which cells extract energy without using oxygen).
  • In the case of this non-oxygen breathing organism, evolution turned it into a simpler organism that shed “unnecessary genes” responsible for aerobic respiration.
  • Other organisms such as fungi and amoebas that are found in anaerobic environments lost the ability to breathe over time.
  • The new study shows that the same can happen in the case of animals, too.

What is Aerobic respiration?

  • Animals, including humans, need energy to perform the various tasks that are essential for survival.
  • Aerobic respiration is one such chemical reaction through which organisms take in oxygen and release carbon dioxide into the atmosphere.
  • Through this mechanism, energy is transferred to cells, which can use it for multiple purposes — for instance, to burn food.
  • Mitochondria is the “powerhouse” of the cell, which captures oxygen to make energy — its absence in the H. salminicola genome indicates that the parasite does not breathe oxygen.

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