https://www.roundupjp.com/ could give plants an advantage in the wild.
Credit Xiao Yang
It has been proven that a genetic-modification technique is extensively used to create crops that are herbicide-resistant gives advantages to an invasive variety of rice. The findings suggest that this modification could positively impact wild rice varieties, as well as crop varieties.
Many varieties of crops have been modified genetically to be resistant to glyphosate, an herbicide first advertised under the brand name Roundup. The resistance to glyphosate allows farmers to eliminate plants without doing any harm to their crop.
Glyphosate inhibits growth of plants by blocking EPSP synthase (an enzyme that is involved in the formation of amino acids, and various other molecules). This enzyme can be as large as 35% or more of a plant’s total mass. The genetic modification technique employed by Monsanto’s Roundup Ready crops, which are located in St Louis (Missouri), typically involves inserting genes into a crop’s DNA to increase EPSP synthase’s production. Genes are typically derived usually from bacteria that infects plants.
The extra EPSP synase makes it possible for plants to counter the effects of glyphosate. Biotechnology labs have also tried to make use of genes from plants rather than bacteria to boost EPSP-synthase production partly to make use of an inconsistency that is in US law that facilitates regulatory approval of organisms carrying transgenes that aren’t made from bacterial pests.
https://www.kohnan-eshop.com/shop/g/g4957919634894/ have looked into whether transgenes such glyphosate-resistant genes could — after introduction to weedy or wild plants by cross-pollination — increase the competitiveness of these plants in survival, reproduction and growth. Norman Ellstrand, a University of California plant geneticist, claims that, in the absence of competition, any kind of transgene would be expected to confer disadvantage in wild plants. The added machinery will decrease fitness.
A new study, led by Lu Baorong, an ecologist from Fudan University in Shanghai, is challenging that notion: it shows that a weedy variant of the standard rice crop, Oryza sativa is given a significant fitness boost from resistance to glyphosate, even when glyphosate is not applied.
In their study, which was published this month in New Phytologist 1, Lu and his colleagues modified the genetics of the cultivated rice species to enhance its own EPSP synthase. ラウンドアップ crossed the altered rice with a weedy cousin.
The group then allowed cross-bred offspring to breed with each other, resulting in second-generation hybrids genetically identical except in the number of copies of the gene encoding EPSP synthase. As one would expect, the higher number of copies resulted in higher levels of enzyme and more tryptophan than their counterparts that were not modified.
https://auctions.yahoo.co.jp/search/search?rkf=2&p=%E3%83%A9%E3%82%A6%E3%83%B3%E3%83%89%E3%82%A2%E3%83%83%E3%83%97&aucmaxprice=999999999&thumb=1&s1=score2&o1=a&isdd=1&ei=utf-8&fixed=3&nockie=1&isnext=1&ex_cat=2084006160,2084008038,2084034075&rewrite_ok_wand_re_search=1 discovered that transgenic hybrids were photogenic, they produced more plants per plant and had 48-125% higher yields of seeds than the non-transgenic varieties.
Lu states that making weedy crops more competitive may increase the difficulties it causes to farmers around the world who have crops affected by the pest.
“If the EPSP-synthase gene gets in the wild rice species their genetic diversity, which is essential to protect may be at risk as the transgene’s genetic make-up could outcompete normal species,” Brian Ford-Lloyd who is a plant geneticist at the University of Birmingham, UK. “This is an example of the very real negative effects [of GM plantson our surroundings.”
ラウンドアップ 藤 challenges the idea that crops with genetically modified genes containing additional copies of their genes are more safe than those that contain microorganisms’ genes. Lu states that the study “shows that this is not always the case”.
ラウンドアップ calls for a rethinking of future regulation of the genetically altered crops, scientists say. ” ラウンドアップ are now suggesting that biosafety regulation can be eased because we’ve reached an extremely high level of satisfaction in the last two decades of genetic engineering,” Ellstrand says. This study isn’t proof that new products are safe.