Thursday, August 30, 2012

Evolution
Photosynthesis-like process found in insects

Scientists say they've found evidence suggesting that the insect 'Acyrthosiphon pisum', a type of pea aphid, traps light to produce adenosine triphosphate, or ATP, the cellular energy currency that powers biochemical reactions.

Aphids are almost unique among insects in their ability to synthesize pigments called carotenoids on their own (a species of
spider mites may do it too) and genes responsible for caretonoid production had been discovered earlier. Many creatures rely on these pigments for a variety of functions, such as maintaining a healthy immune system and making certain vitamins, but all other animals must obtain them through their diet. Entomologist Alain Robichon at the Sophia Agrobiotech Institute in Sophia Antipolis, France, and his colleagues suggest that, in aphids, these pigments can absorb energy from the Sun and transfer it to the cellular machinery involved in energy production.

Scientists we able to come to this conclusion after studying the varying pigmentation pattern and the corresponding energy levels- the orange aphids with high level of carotenoids produce more energy than the white ones with almost no carotenoids.

Maria Capovilla, another entomologist at the Sophia Institute, insists that much more work is needed before scientists can be sure that aphids truly photosynthesize (which strictly requires carbon dioxide to be 'fixed' and turned into organic compounds), but the findings certainly throw up that possibility.

Source: http://beforeitsnews.com/science-and-technology/2012/08/pea-aphids-may-convert-sunlight-into-energy-like-photosynthesis-2457700.html

http://www.nature.com/news/photosynthesis-like-process-found-in-insects-1.11214

http://blogs.smithsonianmag.com/smartnews/2012/08/this-pea-bug-thinks-its-a-plant/

Image Source:http://blogs.smithsonianmag.com/smartnews/files/2012/08/08_20_2012_aphid-photosynthesis.jpg

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