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Posted on Apr 4, 2019
"It's a headache," says Waldan Kwong, a postdoctoral researcher at the University of British Columbia and senior author of a team of scientists who discovered an organism capable of producing chlorophyll but not participating in photosynthesis that could provide clues as to how to protect the world's coral reefs in the future. "We do not know why these organisms cling to these photosynthetic genes. There is a new biology going on here, something we have never seen before. "
The particular organism is nicknamed "corallicolide" because it is found in 70% of the world's corals and can provide clues as to how to protect endangered coral reefs in the future. "It's the second most abundant coral co-inhabitant on the planet and has not been seen so far," says Patrick Keeling, a University of British Columbia botanist and senior scientist overseeing the study. published in Nature. "This organism raises new biochemical questions. It looks like a parasite and it's certainly not photosynthetic. But it's still chlorophyll.
"Having chlorophyll without photosynthesis is actually very dangerous because chlorophyll is very effective at capturing energy, but without photosynthesis, releasing energy slowly, it's like living with a bomb in your cells, "says Keeling.
Chlorophyll is the green pigment found in plants and algae, which allows them to absorb the sun's energy during photosynthesis.
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Corallicolides live in the gastric cavity of a wide range of corals responsible for the construction of reefs, as well as black corals, fan-shaped corals, mushroom corals and anemones. They form an apicomplex, belonging to a large group of parasites with a cell compartment called plastid, which is part of the cells of the plant and the alga where photosynthesis occurs. The most famous apicomplex is the parasite responsible for malaria.
More than ten years ago, photosynthetic algae related to apicomplexans were discovered in healthy corals, indicating that they may have evolved from benign photosynthetic organisms attached to corals before becoming parasites that we know today.
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Ecological data have shown that coral reefs contain several apicomplexes, but corallicolides, the most common, have not been studied to date. The body has revealed a new puzzle: not only does it have a plastid, but it contains the four plastid genes used in chlorophyll production.
The researchers hope that further research on corallicolids will help better understand and better preserve coral habitats.
The Daily Galaxy via the University of British Columbia
Image credit: Wallpaperup.com
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