Wild plants could be capable of resisting herbicides.
ラウンドアップ : Xiao Yang
A common technique for genetic modification of crops to make them resistant to herbicides has been found to give advantages to the weedy varieties of rice even when herbicide isn’t in use. These findings suggest that such modifications may have a wide spectrum of effects that extend beyond farms, and even in the wild.
A variety of cultivars have been genetically altered in order to resist glyphosate. This herbicide was first available under the trade name Roundup. This resistance to glyphosate allows farmers to eliminate the majority of plants without damaging their crop.
Glyphosate inhibits an enzyme known as EPSP synthase that is responsible for the creation of certain amino acid and various other molecules. It can also inhibit plant growth. The method of genetic modification, which is employed for Roundup Ready crops by Monsanto (based in St Louis in Missouri) involves inserting genetic material in a plant to boost EPSP synthase’s output. The genes are typically derived from bacteria that are infected with plants.
ラウンドアップ can resist the adverse effects of glyphosate due to its additional EPSP-synthase. Biotechnology labs tried to use plant genes to boost EPSP synthase activity. This was done in part to take advantage of a loophole in US law that allows regulatory approval of organisms containing transgenes that have not been derived from pests of bacteria.
There aren’t many studies that have examined the possibility that transgenes like ones that confer resistance to glyphosate are able to — once they become wild or weedy relatives via cross-pollination — make those plants more competitive in terms of survival and reproduction. Norman Ellstrand is a University of California Riverside plant geneticist. ” https://www.ponparemall.com/word/除草剤 ラウンドアップ 業務用/ is that any kind of transgene could cause disadvantages in the wild, in the absence of selective pressure because it would reduce the fitness of the plant,” Ellstrand said.
Lu Baorong is an Ecologist at Fudan University Shanghai. His study shows that resistance to glyphosate provides a significant fitness benefit, even though it’s not applied.
The team then allowed cross-breeding offspring to be bred together to produce second-generation hybrids. These were genetically identical with the exception of the copy count and number of the EPSP synthase gene. As expected, those who had more copies expressed higher amounts of the enzyme, and produced more amino acids tryptophan than their non-modified counterparts.
Researchers also discovered that the hybrids with transgenic genes had greater rates of photosynthesis, produced more flowers and shoots and produced 48-125% more seeds than the non-transgenic hybridswith or without glyphosate.
Lu believes making weedy, aggressive rice more competitive could make it harder for farmers to recover from the harm caused by this pest.
Brian Ford-Lloyd, Brian Ford-Lloyd is a UK plant geneticist. He says, “If the EPSP synthase gene becomes present in wild rice species their genetic diversity could be threatened which is really important because the genotype with transgene outcompetes the normal species.” “This is a clear illustration of the very real negative consequences [of GM plantson the surroundings.”
The public believes that genetically modified plants that have more than one copy of their genes than those from microorganisms are safer. This belief is however questioned by the study. “Our study suggests that this isn’t always the case,” Lu says. Lu.
ラウンドアップ call for a reconsideration of the future regulations for the genetically altered crops, researchers claim. Ellstrand believes that some believe biosafety regulations can be relaxed since we have over two decades of genetic engineering. “But the study still suggests that new products need careful analysis.”