Application of biotechnology in preservation of ho

The application of biotechnology in fruit preservation

the application of biotechnology in fruit storage and preservation is a new and promising storage and preservation method in recent years. Among them, the application of biological control and genetic improvement in fruit storage and preservation is gradually emerging

1. The long-term goal of biocontrol and fresh-keeping is to apply the knowledge and technology obtained in this project to Chery's conventional vehicles. Biocontrol is applied to fresh-keeping, without environmental pollution, drug residues and drug resistance in continuous use, and the storage conditions are easy to control and the treatment cost is low. At present, the more successful examples of biological control in fruit preservation are: spraying the non pathogenic strains of pathogenic bacteria on fruits can reduce the fruit decay caused by diseases. If Penicillium cordiformis is sprayed on pineapple, its decay rate will be greatly reduced; Spraying Trichoderma on strawberries before harvest greatly reduced the incidence rate of gray mold after harvest. In recent years, a specific strain, a variant of Bacillus subtilis, has been found abroad. It can produce antibiotics with great efficacy. It can be used to prevent peach brown rot caused by Sparganium frutescens, and the effect is excellent. The United States produces highly effective antibiotics from enzymes and bacteria, and uses them to prevent peach brown rot caused by Alternaria frutescens, with excellent results. American scientists have isolated a strain from yeast and bacteria that can prevent fruit rot and prevent Apple blotch rot

2. Genetic engineering molecular biologists found that once ethylene is produced, fruit B will ripen quickly. At present, Japanese scientists have found a gene that produces ethylene. If this gene is turned off, the rate of ethylene production can be slowed down, and the ripening of fruits will be slowed down, so that the storage life of fruits at room temperature can be extended. Foreign studies have also found that: the changes of cells during post ripening of tomato are controlled by genes, and some varieties lack senescence genes, so post ripening is slow; It is also found in nectarines that whether there is mature plant selection can delay the removal. The manufacturer will also regularly help users protect and clean the high and low temperature impact test box and coloring, which can be stored in the atmosphere of 20 ℃ for a long time after harvest; Scientists from the U.S. Department of agriculture inject immature tomatoes with galactose, a natural sugar in the plant cell wall, to produce a chain reaction, produce ripening hormone, promote the ripening of tomatoes, and do not destroy the taste of tomato quality. It can greatly reduce the loss of tomatoes during harvest, transportation, sales and storage, mature tomatoes, and keep tomatoes fresh for a long time. Therefore, if the classification and precautions in the operation of the friction and wear experimental machine are controlled by gene operation, post ripening is controlled, genetic information is modified by DNA recombination and operation technology, or the expression of mature genes such as PG gene is inhibited by antisense DNA technology, the purpose of delaying the ripening and aging of fruits and prolonging the fresh-keeping period can be achieved

source: China Agricultural Information

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