German scientists newly cultivate transgenic crops containing fatty acids
May 01 05:02:32, 2019
Fish is rich in polyunsaturated fatty acids that are good for the human body, but some people do not like to eat fish because they have fishy smells. German scientists recently used transgenic technology to cultivate flaxseed containing polyunsaturated fatty acids for the first time so that people can consume these fatty acids without eating fish. Studies have shown that polyunsaturated fatty acids such as DHA and EPA can reduce the risk of cardiovascular disease in humans. Fish is rich in DHA and EPA, but none of the plants contain it. However, flaxseed, rapeseed oil, soybeans and walnuts contain substances that can be converted into polyunsaturated fatty acids. The human body can synthesize these substances as DHA or EPA under the action of enzymes, but the synthesis efficiency is not high. For a variety of reasons, the current intake of polyunsaturated fatty acids in most people in the world cannot meet the needs of the human body. At the same time, fish resources are becoming scarce. Therefore, researchers have turned their attention to plants. They tried to add enzymes to plants through genetic modification to enable plants to synthesize these fatty acids. A team of scientists led by the University of Hamburg's botanist Ernest Heinz reported in the latest issue of Plant Cell that they introduced three genes in flax and successfully produced flaxseed containing polyunsaturated fatty acids. seed. Heinz said that a tablespoon of this genetically modified linseed oil has almost been able to meet the body's normal demand for polyunsaturated fatty acids within a day. Experts commented that the new results of Heinz et al. have advanced the research in this field a great step forward. Although the polyunsaturated fatty acid content in transgenic flaxseeds is not higher than fish at this stage, it can be further improved by improving the technology.
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