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Researchers hope to combat grapevine trunk diseases with bio-control treatments

By Vitisphere August 31, 2022
Researchers hope to combat grapevine trunk diseases with bio-control treatments
Vineyard trials are due to verify the research results in the field. - crédit photo : IFV
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ould there be a solution to the grapevine trunk diseases eutypa dieback, esca and black dead arm? An international group of researchers thinks so.

Led by Barry Goodell, professor of microbiology at UMass Amherst in the United States, the research cohort reported in Science Daily that they had identified the compounds released into the grapevine trunk by pathogenic fungi through pruning wounds and understood how they kill vines.  

One is responsible for reducing iron, whilst others produce hydrogen peroxide. When the two molecules meet – “boom! They release a host of oxygen radicals that spread like cancer and blow apart the cellulose walls of the grapevine’s cells so that they can access the sugar-rich fluid”, sums up Goodel, whose original publication is available on the Frontiers website.

According to the researchers, the good news is that the antioxidants and low-toxicity chelators often added to food products to preserve freshness also interrupt the production of reduced iron and hydrogen peroxide, scavenging the oxygen radicals the fungi produce.

There are some select bacteria and fungi that produce these antioxidant and chelating compounds. Our research shows that we may be able to manage and stop GTDs through ‘bio-control’ treatments by increasing the natural presence of these antagonistic organisms on the vines.” Experiments will begin to validate the results.

 

 

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