Transgenic plant foods are the most diverse, most productive, and most in-depth research category in the GM food industry. At present, the main genetically modified plant varieties that have been researched and developed and commercialized at home and abroad are soybeans, corn, rice, potatoes, tomatoes, melons, zucchini, carnations, cotton (cotton seeds), carrots, sunflowers, rape, alfalfa, flax, beet, Sweet pepper, pepper, petunia, papaya, celery, lotus, cucumber, Arabidopsis, Chinese cabbage, lettuce, cowpea, barley, tobacco, and algae. According to the function of transgenic plants, they can be divided into several types, including disease resistance, herbicide resistance, environmental tolerance improvement, development regulation, and improved quality. Transgenic plant pests are difficult to invade disease-resistant transgenic plants including transgenic plants such as anti-viral, anti-fungal, anti-bacterial, and insect-resistant. Genes used in disease-resistant transgenic plants are generally genes whose synthesis products directly kill or resist pathogens, or genes that can regulate plant resistance systems. Plants that have been transferred to these genes are resistant to pathogenic infestations, require no or reduced use of pesticides and pesticides during planting, and increase yield. Rice, corn, rape, cabbage, alfalfa, tomato, cucumber, melon, cassava, potato, beet, bell pepper and other anti-viral transgenic plants have been cultivated. It is estimated that the annual output loss of crops caused by weed damage in China is 10% to 20%. In agricultural developed countries, herbicides have been widely used, and our country's farmland with herbicides is also close to 1/3. Herbicide-resistant transgenic plants are protected from herbicide damage because the introduced genes produce enzymes that degrade herbicides, so that these plants produce resistance against herbicides, or they have increased tolerance to herbicides. Improve the environmental tolerance conditions of the bad conditions, such as low temperature, high temperature, drought, flood damage, salinity, heavy metals, organic pollutants, etc., are unfavorable to the growth of crops, which is the common cause of low production, reduced production, or even lost. A number of transgenic plants have been studied and developed that are highly tolerant to environmental conditions and can grow well under extreme environmental conditions. The ability to make full use of nutrients in the environment, reduce the use of chemical fertilizers, and increase product output is also a manifestation of the environmental adaptability of genetically modified plants. For example, the transfer of nitrogen-fixing genes of certain nitrogen-fixing bacteria to crops such as rice and corn can significantly reduce the use of chemical fertilizers during planting and increase production by 1 to 20%. Developmentally Regulated Transgenic Plants Developmentally Regulated Transgenic Plants can regulate the development of crops, control their reproduction, maturation, quality and color, and have fulfilled the good wishes of humans for many years. For example: Numerous crops are breeding through pollination. Due to the restriction of natural conditions, most crops can only be pollinated nearby or randomly selected, often resulting in the phenomenon of “inbreeding†and leading to the continuous degradation of seeds. Hybrid breeding breaks this natural breeding model and breeds excellent hybrids. Transgenic CMS plants successfully solved this problem. Has been applied in rape, rice, wheat, corn and other aspects. Ethylene is an important endogenous hormone in the ripening of plant fruits, which controls the ripeness and degree of fruit. In order to extend the shelf life of certain fruits and vegetables and melons, by controlling the genes that control the key enzyme of ethylene synthesis, the amount of ethylene in fruit can be controlled, not only can it slow down the ripening process as needed, but also can make the fruit in natural conditions. Can't mature under. It greatly facilitates storage and transportation. The most typical application example in this regard is the transgenic storage-tolerant tomato. Transgenic plants have health functions The use of transgenic plants as bioreactors to produce a variety of active functional ingredients for medicinal and health use is a major area of ​​application for transgenic plants. There have been dozens of genes for medicinal and health-care proteins that have been transferred to plants for the production of health-care plant products. The use of genetically modified plants for the production of edible vaccines simplifies the preparation of traditional medical vaccines, greatly reduces production costs, and eliminates the need for processing, purification and refrigerated storage for ease of use. For example, hepatitis B surface antigens have been synthesized in tobacco, tomatoes and potatoes, and it has been demonstrated that the immune response is feasible; recently, seedlings vaccines capable of preventing cholera have also been developed.