11 month 2, the newspaper reported that the provincial city of Ms. Fu in a friend circle of the sun, a tomato "immortal", full storage for 79 days All of them are in good condition. At noon that day, Mr. Lee called the newspaper hotline, saying that a tomato from his friend's house had been released for 8 months, and it was "intact." It seems that tomatoes are not bad for a long time. Why is it so long? Is it really soaked in medicine? In this regard, the reporter interviewed experts from Zhejiang University and Shandong Agricultural University. The expert's explanation, like a science class, often contains "late maturing genes", which belong to "hard fruit" crops, characterized by hard fruit, less juicy, not rotten, usually stored for two to three months; if the outside temperature is suitable, the air is more durable than dry preservation. It's rare. Mr. Yang Rui
Mr. Li told reporters that that morning he went to a friend's house to speak to his friends in the 79 days that we saw in this newspaper. Tomatoes stored for a longer time did not rot at home for 8 months. "I think it's a very interesting thing to call you. I didn't think there was such a thing. Tomatoes can last for 8 months." Yesterday afternoon, the reporter came to Mr. Li's friend Li's home and saw the tomato that had been released for 8 months. From outside, tomatoes are bright and fresh, and there are no wrinkles on the epidermis. Only two black spots appear on the bottom of tomatoes. "Although tomatoes have been in the house for 8 months, the appearance has not changed at all," Li said. "It is not very different from what I just bought."
according to Ms. Li, the tomato was bought in March this year, when the child returned home. "It was not so good to buy, then two, and the rest was forgotten. Until last month, the two tomatoes were not bad, and they cut one," Ms. Li said, after the tomato was cut. It was not very different when I was just buying it. "But it's all white tendons, red flesh is very little, and it doesn't taste good, and the tomato is put out for so long at home, but the tomato looks good, but it doesn't look bad."
experts say that it is normal and not bad. Tomatoes are hard fruit type
tomatoes for so long. Is it really all right? In addition to the residents who have been reporting their homes for a long time, there are some people calling, hoping that reporters can follow up on the report and try to understand what is going on.
, in this regard, the reporter interviewed Professor Wang Bingliang, deputy director of the Vegetable Research Institute of Zhejiang University. It is necessary to first explain the "coming" of the Vegetable Research Institute: one of its main direction is the "regulation and safety production of growth and development" of vegetables. This direction is based on the important cultivated vegetables such as tomatoes and cucumbers, and the important content is "regulation mechanism of fruit development".
as for Professor Wang, he has served as a Zhejiang Provincial Committee and a provincial government science and technology special, and has played a think-tank role. The title of a postgraduate master's thesis he has brought is called the study of the storage characteristics and genetic rules of the fruit of the tolerant tomato material.
Professor Wang told reporters that the original ripe tomatoes were picked up for fifth days to rot, until the twenty-fifth day decay rate almost reached 100%, and the fruit flavor quickly deteriorated and the quality decreased. Tomato is one of the main vegetables in China. The annual consumption of tomato picked up is 15%-20% of total output, and the economic losses are great. Therefore, tomato varieties that are resistant to storage should be born occasionally. For example, in the last few years, tomato breeding experts have discovered a variety of tomato maturing mutants. Their common characteristics are that the fruit ripening process is very slow, produces very little lycopene, and the fruit is very hard. This kind of cultivar, which is made from tomato mature mutant gene (late ripening gene), is a way to prolong storage period.
Professor Wang said that tomatoes that were released for a long time were "hard fruit" crops. Its characteristics are that the pulp is hard and the juice is less, and it is not easy to rot. It usually can be stored for two to three months, and the fruit will not change color or turn to pale yellow. If the outside temperature is suitable, the air is relatively dry and can be kept longer.
in an interview, a professor at Shandong Agricultural University also told reporters that the state of the country's storage technology for tomatoes is already quite mature, the means of preservation are quite complete, and tomatoes are more normal than the storage time of the past.
Professor Wang also told reporters that the long and not bad tomatoes have been in fact all the time, not only recently, but now for the convenience of transportation, more people are willing to cultivate this kind of tomato, so it is sold on the market. The sale of this kind of tomato is becoming more and more popular, and tomatoes are more common at home for a long time.
to say that the home has not been rotted for 8 months, Professor Wang said, the tomato is an unmatured body, not a new variety now, the tomato itself will not produce ethylene gas, so it can effectively inhibit its own mature corruption, to achieve "forever young" effect. All these belong to the natural phenomena of organisms, and they are not mutated. "Ms. Li opened the house for 7 months and found that the white gluten was more normal, because the organism still had a breath of nourishment during the storage process, and the consumption of long time tomatoes would reduce more flesh and therefore more white tendons." "It's normal for tomatoes to be stored at home longer than before," Professor Wang said. "It's not necessarily linked to other factors that people are worried about." many "hard fruit" varieties, such as "double earnings" and "Hua Bo No. 1", can be stored longer. It can be stored for a long time, "like some people fat, some people thin, just form different, the essence is the same, different varieties of Tomato in the sweetness, hardness and preservation time have different but the same nature, the human body and non-toxic side effects, the public can rest assured food." Use it. "
storage is bubbling water? It is impossible, it is impossible to keep a longer storage of
"tomatoes release ethylene gas in the process of maturity to promote fruit maturation and senescence. This ethylene gas is released by the organism during its natural maturation, but contains a gene mutant (late gene). Tomatoes are unable to produce ethylene gas by themselves, so they will not accelerate their maturation and achieve long-term preservation. Professor Wang told reporters.
worry about people worried about genetically modified or bubbling water, Professor Wang said, "we don't have genetically modified tomatoes in our country. Domestic varieties have been able to meet the needs. It doesn't need to be genetically modified, and tomatoes will come into being in their own maturity." Ethylene gas is not ripe, picking soaking water will accelerate the aging rate, and can not achieve the goal of long-term storage, so it is impossible.
in addition, Professor Wang also imparted a small trick: "if you buy this' hard fruit 'tomato, you can put tomatoes and bananas in the same plastic bag, and the ethylene gas released by bananas will quickly ripening tomatoes, no difference from ordinary tomatoes.
extension reading
fruit and vegetable "abnormal" want to test, it is not cheap
the test of pesticide residues is close to three thousand
in the interview process, the reporter found that some citizens have thought of testing when they found the existence of vegetables and fruits in the home, but "it is not easy to test". A thousand detection costs are prohibitive.
it is understood that at present, the third party organizations for testing and testing vegetables and fruits are not much and expensive, and the test of fruits and vegetables is not as simple as imaginary. It is necessary to have a clear classification of the samples for inspection. A comprehensive inspection of a large category will naturally increase with the increase in composition. As an example of antiseptic testing, the general antiseptic test is to detect six components. The cost of each component is about 600-700 yuan. If it is not able to accurately say which component to detect, the six components of the preservative are tested and the cost is the sum of the cost of the six components.
reporter learned from a number of testing agencies that the current cost of detecting pesticide residues in vegetables and fruits is approximately 2500-3000 yuan, the cost of testing preservatives between 3600-4900 yuan and formalin is 600 yuan.
but for most people, it's very difficult to say exactly which component you want to test. "We're just looking at the reason why we want to know the reason, the worry, and it doesn't have to be tested," said Mr. Li, the citizen. "And it will take a month's salary to detect a tomato. Think about it. Even if it is. "