We all know that when the apple peels, the flesh exposed to the air will change color. This is because the phenolic substances in the plant cells are oxidized with air in the action of phenol enzymes, producing a large amount of terpenoids. New born anthraquinones can quickly turn plant cells brown. This change is called enzymatic browning of food. So Apple peels and changes color after a while. Browning affects the appearance of the food and reduces the nutritional content of the outer layer, but it is still edible. If the apple is left for a long time after peeling, the oxidative decomposition of the plant cells in the air will intensify, the nutrients in the outer layer of the apple will be decomposed more, and the pectin substance will be further decomposed into pectic acid and methanol under the action of the enzyme, making the pulp Loose, moist, discolored, off-taste, and even spoiled. This also makes apples appear less frequently in fresh fruit platters.
Today Xiao Bian wants to tell everyone that the good news is that Apple's way of discoloration is no longer an external measure. It will not be discolored and Apple will soon be born!
From the two apples in the figure above, it is clear that the degree of oxidation of the incision does not understand. A U.S. company is trying to sell a genetically modified apple that won't be oxidized to brown after the apple is sliced ​​or bumped. According to reports, the company, Okanagan's specialty fruit, said that the non-dark apple, known as the “Arctic Apple,†will be welcomed by consumers and food companies and will help increase sales of Apple. the amount.
It is reported that Arctic apple contains a comprehensive gene that can dramatically reduce the production of polyphenol oxidase, which is the "culprit" of apple meat darkening. This gene is not from other species. Its DNA sequence is from Apple's own four genes that control polyphenol oxidase.
In fact, as early as the 1990s, Americans began to use genetically modified foods, but these foods are mainly concentrated on processed foods. Therefore, the Arctic apple may become the first genetically modified fruit that people eat directly into their mouths.
However, the American Apple Association, which represents Apple businesses, opposes this kind of Apple production. The association said that although they do not think that this genetically modified apple is harmful, it will undermine the image of Apple's health and natural food.
The head of Okanagan Fruit Company stated that the apples that do not oxidize and darken can increase the company’s sales, just as children’s carrots can increase carrot sales. "A complete apple is a 'big project' for some people on certain occasions." He said that if there is a fruit plate at the party, people may not get it, but if it is a piece of apple , it is very likely that everyone will eat one.
In the United States, apple slices are popular as a health food and are sold in supermarkets and restaurants. However, these apple slices are usually coated with vitamin C and calcium to prevent oxidation darkening, which will affect the taste of the apple itself. The listing of the Arctic apple may be able to solve this problem.
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