Posts Tagged ‘GMO’
Controversy has erupted over new French scientific research claiming that genetically modified corn and the herbicide Roundup increases the chance of lab rats developing tumours and dying prematurely.
By John Vidal, Guardian UK 29 September 2012
Trial suggesting a GM maize strain causes cancer has attracted a torrent of abuse, but it cannot be swept under the carpet
Professor Gilles-Eric Séralini, professor of molecular biology at Caen university in France, knows how to inflame the GM industry and its friends. For seven years he and his team have questioned the safety standards applied to varieties of GM maize and tried to re-analyse industry-funded studies presented to governments.
The GM industry has traditionally reacted furiously and personally. Séralini has been widely insulted and smeared and last year, in some desperation, he sued Marc Fellous, president of the French Association of Plant Biotechnology, for defamation, and won (although he was only awarded a nominal €1 in damages).
But last week, Seralini brought the whole scientific and corporate establishment crashing down on his head. In a peer-reviewed US journal, Food and Chemical Toxicology, he reported the results of a €3.2m study. Fed a diet of Monsanto’s Roundup-tolerant GM maize NK603 for two years, or exposed to Roundup over the same period, rats developed higher levels of cancers and died earlier than controls. Séralini suggested that the results could be explained by the endocrine-disrupting effects of Roundup, and overexpression of the transgene in the GMO.
This was scientific dynamite. It was the first time that maize containing these specific genes had been tested on rats over two years – nearly their full lifespan – as opposed to the 90-day trials demanded by regulators. Around a dozen long-term studies of different GM crops have failed to find similar effects. Séralini’s study also looked at the toxicity of the Roundup herbicide when fed directly to rats.
August 6, 2010 Care2
This is the stuff of my nightmares: Genetically-modified (GM) plants escaping the confines of agriculture and invading the wild. We thought regular invasive species were bad? They seem tame compared to genetic contamination of the wild. Even more alarming: Some of the plants had a mix of modified genes, indicating that they are reproducing on their own.
Although GM plant populations in the wild have been found in Canada, this is the first time they have been found in the United Sates.
Meredith G. Schafer, from the University of Arkansas, and colleagues established transects of land over 3000 miles long including interstate, state and county roads in North Dakota from which they collected, photographed and tested 406 canola plants.
The results show that transgenic plants have clearly established populations in the wild. Of the 406 plants collected, 347 tested positive for CP4 EPSPS protein (resistant to glyphosate herbicide, aka Roundup) or PAT protein (resistant to glufosinate herbicide, aka LibertyLink). The finding shows that genetically modified canola plants can survive and thrive in the wild perhaps for decades–the study was presented today at the annual meeting of the Ecological Society of America.
The team’s key finding was two plants that each carried both types of herbicide resistance — a combination that is not commercially available. The only way this can happen in the wild is if the plants are reproducing on their own. “There were two instances of multiple transgenes in single individuals,” said coauthor Cynthia Sagers, University of Arkansas. “Varieties with multiple transgenic traits have not yet been released commercially, so this finding suggests that feral populations are reproducing and have become established outside of cultivation. These observations have important implications for the ecology and management of native and weedy species, as well as for the management of biotech products in the U.S.”
Once a GM crop is released it cannot be unreleased, and there are no systems in place to prevent genetic contamination through pollen flow, spills or human error. Although the GM plants found by the roadside are assumed to be the result of escaped seeds during transportation, the GM plants found away from roads suggest that the plants are taking on a life of their own.