Artificial seed means to cultivate an embryoid with a complete individual structure through tissue culture, and then coat a layer of organic compounds on its surface as seed coat to protect the embryoid and provide nutrients, so as to obtain an artificial culture that can replace seeds. At present, plants that have obtained artificial seeds include carrots, celery, alfalfa, rice, tomatoes, lettuce, cauliflower, corn, American ginseng and camellia. Now, in addition to the packaging materials and methods of artificial seeds, there are also methods for cultivating split tissues such as alfalfa, celery, cabbage and lettuce, which have been patented in the United States or Japan.

The production of artificial seeds can be carried out all year round, which requires little space and does not occupy a lot of land. Moreover, embryoids have the characteristics of rapid reproduction and large number in the culture process. Therefore, artificial seeds have broad application potential in agricultural production. Kirin Company in Japan and Bio-investment and Plant Genetics Company in the United States have made good attempts in this respect. They cultivated a large number of cultivated celery, lettuce F- 1 hybrids and new rice varieties with artificial seeds. After 6 months of callus culture with 1 g, celery can form100000 embryoids, lettuce can form100000 embryoids, and rice can form 250 embryoids.

In order to reach the stage of comprehensive application, the production of artificial seeds must first obtain a large number of synchronous embryoids, then master the technology of restraining the genetic variation of embryoids, improve the wrapping materials and embedding methods of embryoids, and finally study the technology of improving the seedling rate of artificial seeds.