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In the wild, plants can be given resistance to herbicides.

ラウンドアップ Credit Xiao Yang
Genetic modification to create crops resistant to herbicides has been extensively utilized to provide advantages to species of rice that are weedy. These results suggest that such modifications can have a broad range of effects beyond the farms, and even into the wild.

There are many kinds of plants are genetically modified to resist glyphosate. Roundup was the first herbicide that was marketed. This resistance allows farmers to remove the majority of the weeds that grow in their fields without causing harm to their crops.

ラウンドアップ 評判 Glyphosate can inhibit plant growth by inhibiting EPSP synase which is an enzyme that plays a role in the creation of amino acids as well as other chemicals which comprise around 35% of the plant’s mass. The method of genetic modification, which is employed in Roundup Ready crops by Monsanto (based in St Louis in Missouri), involves inserting genes in a plant to boost EPSP-synthase output. These genes usually come from bacteria that have caused the infection of the plant.

The additional EPSP synase makes it possible for the plant to resist the harmful effects of glyphosate. Biotechnology labs are also looking to make use of genes from plants rather than bacteria to boost EPSP synthase. This is partly because the US law permits regulatory approval to allow organisms that carry transgenes to get recognized as acceptable.

There aren’t many studies that have examined whether transgenes, such as those that confer resistance glyphosate, could help plants to be more resilient in their survival and reproduction after they cross-pollinate with wild or weedy species. Norman Ellstrand is a University of California Riverside plant geneticist. “The assumption is that any kind of transgene could cause disadvantages in the wild, in the absence of pressure to select, since it could reduce the fitness of the plant,” Ellstrand said.

Lu Baorong from Fudan University in Shanghai is now challenging that view. The study demonstrates that glyphosate resistance , even when it is not applied to an weedy type of rice crop could provide a substantial health benefit. Lu and his associates modified the cultivars of rice to increase the production of EPSP synthase. They also crossed the modified rice with a weedy-related. Their research was published in NewPhytologist 1.

The team allowed the offspring of crossbreeding to crossbreed with each other, creating second-generation hybrids that are genetically identical with each other except for the number of copies of the gene encoding EPSP synase. The ones with more copies expressed greater amounts of the enzyme and produced more amino acid tryptophan than their non-modified counterparts.

Researchers also found that transgenic hybrids are more photogenic, they produced more plants per plant and had 48-125 percent higher yields of seeds than varieties that were not transgenic.

ラウンドアップ Lu believes that making weedy invading rice more competitive might make it more difficult for farmers to recover from the harm caused by this pest.

Brian Ford-Lloyd of Brian Ford-Lloyd, a researcher at the University of Birmingham, UK Brian Ford-Lloyd from the University of Birmingham, UK “If the EPSP synthase gene is introduced to wild rice species the genetic diversity of their species, which was really important for conserving, could be threatened because it would surpass the regular varieties.” “This is one the most obvious instances of extremely plausible negative consequences of GM crops] upon the natural environment.”

The belief of the public that genetically modified crops containing additional copies of their genes are safe is disproved by this research. ラウンドアップ “Our study suggests that this isn’t necessarily the case,” Lu says. Lu.

Researchers say this finding calls for review of the regulations for the future on genetically modified crops. “Some individuals are saying that biosafety regulation can be eased because we’ve reached an incredibly high level of confidence with two years of genetic engineering” Ellstrand says. “But the research shows that the new technologies require careful assessment.”