Even though Apes and humans have same odour detecting receptors, yet the manner in which they are employed is different for mate selection,according to Duke University researchers.
All the species use odour receptors in different ways, stemming from the way the genes for these receptors have evolved over time.he researchers analysed the sequences and functions of the gene for the odorant receptor OR7D4 in terms of perceiving two steroid molecules related to testosterone, androstenone and androstadienone.
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"There's variation in sensitivity of the odorant receptor from this gene (all primates) have. Maybe these molecules operate in the process of reproduction. The fact that there is variation fits with this theory. Reproduction demands that an animal avoid attraction to other species, so variation in the receptor's sensitivity to these odours may prevent any cross-species attraction," said Dr. Hiroaki Matsunami.
Animals rely on olfactory signals to make all sorts of decisions about other animals, particularly in reproduction, said Dr. Christine Drea.
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The odorant receptor gene, which the paper traces back to the mongoose lemur, evolved differently within the various primate species.
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Emory Vaccine Center researchers have shown that HIV relies upon a number of strategies rather than use any preferred escape route to escape immune system pressure.
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The findings support the evidence that primates have a common ancestor, but we are very different now.
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The Brain behind Facial Recognition
Suppose, you are on a stroll and you bump into a grey-haired man, you just cant miss, and instantly, you exclaim “hello, Mr. Clinton…”, but have you considered the brain behind the ability
Suppose, you are on a stroll and you bump into a grey-haired man, you just cant miss, and instantly, you exclaim “hello, Mr. Clinton…”, but have you considered the brain behind the ability
Ultimately, the work will aim at discerning how smelling these chemicals might affect human social and sexual behaviour.
"We will begin working with a collaborator to examine chimpanzee behaviour with regard to odour perception," said Matsunami.
However, the sense of smell also can vary from animal to animal and person to person, because of combinations of a number of odour receptors.
"The sex-steroid related odours act as pheromones in pigs. Pigs that are ovulating and that are exposed to the pheromones assume a mating posture. It's debatable whether these chemicals act similarly in humans. But there is evidence that smelling these odours can affect the mood and physiological state of both men and women. We have a lot more studying to do, but this finding and others in the future will create a picture of how smell may relate to sexual reproduction," said Matsunami.
The study was published online in the Early Edition of the Proceedings of the National Academy of Sciences.
Source-ANI
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