U.S. herbicide-resistant transgenic plants flee for the first time

According to "New Scientist" reported on the 10th, a difficult-to-classify grass found in rural Oregon, the grass is not a native plant, it is difficult to say it is a foreign grass, it is actually a transgenic grass, and This grass is generally grown on golf courses. Now, it actually "runs" to other places. This makes the USDA very worried that the ministry is conducting a comprehensive assessment of the environmental impact of this genetically modified plant. This is the first time in the history of American transgenic plants.

It is reported that in the United States, this was the first time that a genetically modified plant had been brought into the wild, and it had been “escaped” before it was approved by the U.S. Department of Agriculture. This bentgrass carries a bacterial gene that makes it immune to the powerful herbicide citrin. The grass was cultivated by The Scotts Company, the largest American gardening fertilizer manufacturer in Marysville, Ohio, and it was hoped that the lawn with this grass would allow golf course owners to use the grass. Citrus phosphine removes too much weed, making it easier to manage golf turf.

U.S. Environmental Protection Agency researcher Jayett Mann and his colleagues in Corvallis, Oregon, identified 9 out of 20,400 samples taken within a 4.8-km radius of planted vinegrass. Escape "grass, the furthest spread beyond 3.8 kilometers. Reitman's team has shown that this transgenic grass is not only produced by pollinating non-transgenic plants but also by the migration of seeds.

Perennial grasshoppers, once they have taken root, will continue to grow year after year. However, most of the GM crops, mainly soybeans, corn and rapeseed, are annual, and cannot be regenerated. They are harvested once a year, and all new harvests are harvested in the following year. Another concern is that Bentgrass is not like other GM crops. It has a wide range of related plants in the United States that can be crossed with it. This could potentially pass the glufosinate gene to other species. As for the results, now It is not yet predictable.

Reitman said: "As for what will happen to other transgenic plants that may cause more concern, this is a cautionary event. I suspect there will be more examples." His report will appear in the "Molecular Ecology Study on the October issue. If this grass is planted with the approval of the U.S. Department of Agriculture, then thousands of golf course managers across the United States will have to change this grass, and soon enough, this plant will grow. If this grass is spread to the surrounding wasteland or drains, herbicides may be used to remove it, but relatively speaking, the herbicide-resistant herbicides are much more powerful than ordinary grass and are less likely to be removed. .

When Eric Baker of Indiana University commented on Reiterman's discovery in Modern Biology, “There is no doubt that this is a new discovery that we did not involve in previous GM crops.” However, Scientists are not yet clear whether this GM grass will have such a big influence in the wild. Baker said: "You can't expect that this herbicide-resistant transgenic grass will also be a special advantage in the wild." The US Department of Agriculture did not classify this traditional bentgrass as a "harmful" weed.

However, if the genetically modified plant is contaminated with other better varieties of grass during the planting process, it may also trigger lawsuits. In the United States, about 70% of commercial grass seeds grow in Oregon, so the possibility of occasional doping still exists. A spokeswoman for the Department of Biotechnology Regulatory at the Department of Agriculture in Riverdale, Maryland, said: "This perennial has many wild, weed-like relatives. I think we need to know is that it will give The impact of the environment. At present, we do not know when this 'assessment of the impact on the surrounding environment' will end."

Whether the American public will pay attention to this hot topic is also a big question. Baker said: "People haven't shown any concern about genetically modified foods. I don't think they will worry about lawns and golf courses."

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