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Petroleum-eating mushrooms
Date:11/30/2011

MONTREAL, November 30, 2011 Take a Petri dish containing crude petroleum and it will release a strong odor distinctive of the toxins that make up the fossil fuel. Sprinkle mushroom spores over the Petri dish and let it sit for two weeks in an incubator, and surprise, the petroleum and its smell will disappear. "The mushrooms consumed the petroleum!" says Mohamed Hijri, a professor of biological sciences and researcher at the University of Montreal's Institut de recherche en biologie vgtale (IRBV).

Hijri co-directs a project with B. Franz Lang promoting nature as the number one ally in the fight against contamination. Lang holds the Canada Research Chair on Comparative and Evolutionary Genomics and is a professor at the university's Department of Biochemistry. By using bacteria to stimulate the exceptional growth capacity of certain plants and microscopic mushrooms, Hijri and Lang believe they are able to create in situ decontamination units able to successfully attack the most contaminated sites on the planet.

The recipe is simple. In the spring, we plant willow cuttings at 25-centimeter intervals so the roots dive into the ground and soak up the degrading contaminants in the timber along with the bacteria. At the end of the season, we burn the stems and leaves and we are left with a handful of ashes imprisoning all of the heavy metals that accumulated in the plant cells. Highly contaminated soil will be cleansed after just a few cycles. "In addition, it's beautiful," says Hijri pointing to a picture of dense vegetation covering the ground of an old refinery after just three weeks.

Thanks to the collaboration of an oil company from the Montreal area, the researchers had access to a microbiological paradise: an area where practically nothing can grow and where no one ventures without protective gear worthy of a space traveler. This is where Hijri collected microorganisms specialized in the ingestion of fossil fuels. "If we leave nature t
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Contact: William Raillant-Clark
w.raillant-clark@umontreal.ca
514-343-7593
University of Montreal
Source:Eurekalert  

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