U.S. attempts to absorb pollution with genetically modified plants U.S. researchers are conducting an experiment in Danbury, Conn., to plant genetically modified cotton plants on the former site of the plant and use it to absorb mercury from the soil. The researchers who conducted the experiment were students of the University of Georgia. They began planting genetically modified cotton on the site of a hat factory in Danbury since 2003. This is the most recent experiment in the United States that uses genetically modified plants to absorb pollution. In California, other researchers are also doing similar experiments. Researchers are growing Indian mustard trees where selenium is contaminated by water from contaminated irrigation, absorbing selenium that is harmful to the human body. GMOs can also bring about dangerous and negative effects while absorbing harmful pollutants, because substances like mercury cannot be broken down into harmless elements like oil. Dare to "eat" arsenic genetically modified plants We often see stories of people in the novels and TV series. However, in the soil under our feet, there are many places that contain arsenic. The arsenic of arsenic is caused by the arsenic toxicity of arsenic. Arsenic in the natural world can be divided into trivalent arsenic and pentavalent arsenic. After ingested by the human body, it will be metabolized into toxic chemicals in the body. Large doses of arsenic can cause rapid death. Long-term intake of trace amounts of arsenic can cause cancer. In areas exposed to arsenic, arsenic remains in the soil even after hundreds of years. Recently, Professor Richard Miguel and his colleagues at the University of Georgia have successfully cultivated transgenic plants that can absorb arsenic from the soil. Using genetic engineering techniques, Professor Mige inserted two genes of arsenic-absorbing bacillus into a mustard gene sequence. In addition, transgenic amaranth that can absorb arsenic is cultivated. The traditional method of treating heavy metal pollution is to excavate a site and transport the contaminated soil to land. However, this method not only takes time and money, but also causes environmental pollution again. Professor MiG pointed out. Some transgenic plants have particularly long roots and use these long-rooted transgenic plants to absorb heavy metal arsenic in the environment. Particularly convenient and effective. Moreover, these heavy metal arsenics are slowly absorbed in the leaves of transgenic plants, and destruction and recycling are particularly convenient and safe. Prof. Mige also pointed out that for breeding regions that absorb heavy metal transgenic plants, grazing should be strictly prohibited, so as to avoid serious animal and livestock poisoning after those plants are eaten by animals. Transgenic Tobacco Clears TNT In some areas where war has occurred, explosives have been left behind, contaminating the soil. One of the major pollutants is trinitrotoluene (TNT). For plants and animals, TNT is a highly toxic contaminant. If humans eat vegetables, crops, or meat containing TNT, they may cause anemia, cirrhosis, and cancer. At present, large areas of the world have been polluted by TNT. The usual method for removing TNT in soil is to burn it. However, this method of eliminating TNT pollution is expensive, and it produces ash that cannot be recycled and also produces toxic fumes. Because the incineration method still pollutes the environment to a large extent, scientists are looking for better ways to remove TNT. Recently, some British bioscientists have cultivated a type of transgenic tobacco that can absorb TNT in soil and then convert TNT into substances that are harmless to other plants and thus remove soil contamination. The decontaminating genes of these transgenic tobacco plants are derived from a bacterium in the soil that produces an enzyme that converts TNT. This transgenic tobacco was discovered by a team led by Neil Bruce of the University of Cambridge. To find a feasible method for removing TNT in soil, the Bruce team made soil samples from areas contaminated with TNT. When analyzing these soil samples, they unexpectedly discovered bacteria that lived in soil that was heavily contaminated by TNT. Why are these bacteria not poisoned? Originally, the bacteria's adaptability and evolutionary ability were particularly strong. The soils rich in TNT were not only non-toxic bacteria, but were used as the source of nitrogen by the evolved bacteria. After the researchers introduced genes related to bacteria that could eat TNT into tobacco, they discovered that GM tobacco could thrive in areas contaminated with TNT. If ordinary tobacco is grown in these areas, the roots and stems of these tobaccos are seriously poisoned until they die. If the GM tobacco is cultivated in large areas in areas contaminated with TNT, the soil will be cleaned up after a few years. The researchers also intend to introduce genes related to TNT bacteria into poplars because poplars have a stronger absorption capacity and will be more effective in eliminating environmental pollution. "Eat" mercury in GM tobacco If your home mercury thermometer breaks, you can't be paralyzed because these mercury drops spilled on the floor are not dealt with in time. They will evaporate into mercury vapors that can be inadvertently inhaled by you. Mercury and mercury compounds are toxic. Mercury has significant neurotoxicity and has adverse effects on the endocrine system and the immune system. Common symptoms caused by mercury are polio and cartilage. If they contain mercury in the soil, they will slowly be absorbed by some crops. Then we were taken into our body. After three years of hard work, scientists from China and the United States have finally cultivated the world's first transgenic tobacco with significant mercury consumption. The use of genetically modified tobacco to "eat" mercury is not only highly efficient, but it does not leave any residue. Chinese and American scientists have chosen tobacco for mercury pollution because tobacco has the characteristics of large plants, fast growth, strong adsorption, and a wide range of cultivation. Experiments show that the effect of this transgenic tobacco on mercury absorption is 5-8 times higher than that of conventional tobacco. A soil with severe mercury pollution can significantly reduce the mercury content after the Sansihe transgenic tobacco is grown. In addition to mercury, this transgenic tobacco can also absorb gold and silver. Therefore, this GM tobacco not only has important environmental value, but also has important economic value.
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