A global group of researcher has found that a small parasite of salmon called Henneguya salminicola has no mitochondrial genome and in this manner has lost the capacity to perform high-impact breath.
Albeit high-impact breath is a sign of eukaryotes, a couple of unicellular genealogies, developing in hypoxic conditions, have optionally lost this capacity.
Without oxygen, the mitochondria of these living beings have lost all or parts of their genomes and advanced into mitochondria-related organelles.
“Aerobic respiration was thought to be ubiquitous in animals, but now we confirmed that this is not the case,” said group pioneer Professor Dorothee Huchon, a scientist in the School of Zoology at Tel Aviv University and the Steinhardt Museum of Natural History.
“Our discovery shows that evolution can go in strange directions. Aerobic respiration is a major source of energy, and yet we found an animal that gave up this critical pathway.”
In the examination, Professor Huchon and partners from the University of Kansas, Oregon State University and Tel Aviv University sequenced and broke down the genome of Henneguya salminicola, a modest, under ten-celled parasite of salmonid fish.
The investigations recommend that the minuscule creature lost its mitochondrial genome as well as almost all atomic qualities engaged with translation and replication of the mitochondrial genome.
Until this revelation, there was banter with respect to the likelihood that life forms having a place with the collective of animals could make due in anaerobic conditions.
The supposition that all creatures are breathing oxygen was based, in addition to other things, on the way that creatures are multicellular, profoundly created living beings, which previously showed up on Earth when oxygen levels rose.
“It’s not yet clear to us how the parasite generates energy,” Professor Huchon said.
“It may be drawing it from the surrounding fish cells, or it may have a different type of respiration such as oxygen-free breathing, which typically characterizes anaerobic non-animal organisms.”
“The discovery bears enormous significance for evolutionary research,” they said.
“It is generally thought that during evolution, organisms become more and more complex, and that simple single-celled or few-celled organisms are the ancestors of complex organisms.”
“But here, right before us, is an animal whose evolutionary process is the opposite. Living in an oxygen-free environment, it has shed unnecessary genes responsible for aerobic respiration and become an even simpler organism.”