细胞工程名词解释（Explanation of cellular engineering terminology）.docVIP

细胞工程名词解释（Explanation of cellular engineering terminology） 1. cell line: a cell or cell line obtained from primary culture or cell and characterized by its characteristic cells throughout its subsequent culture. 2. cell lines can generate infinitely subcultured cells from primary culture. 3. density suppression: with the increase of cell density, the phenomenon of normal cell division is inhibited by cell depletion and metabolic products. 4., contact inhibition: with the increasing number of cells, contact each other into pieces, normal cells due to contact, restricting movement phenomenon. 5. stem cells: a class of cells with self-renewal and differentiation potential. 6. plant tissue culture: under sterile conditions, isolated organs, tissues, cells, embryos, protoplast culture medium in the manual configuration, given the appropriate culture conditions, induce callus, an experimental technique or latent buds of new plants. 7. explants: isolated materials used in vitro for axenic culture in plant tissue cultures. They can be organs, tissues, cells, and protoplasts. 8. callus: a group of indeterminate arranged parenchyma cells which are formed by the cells of explant. 9. Browning: as the polyphenol oxidase in the tissue is activated, the metabolism of cells changes. Phenolic substances are oxidized to produce quinones. These brown substances are toxic to the explants and die when they are very serious. The 10. subculture of embryogenic callus in medium growth after a period of time, nutrient depleted water loss, and has accumulated some metabolites, the needs of these organizations will be transferred to the new medium, this transfer is called subculture. 11. glass: the performance of in vitro leaves, shoots crystal is transparent or translucent, water soaked, whole plant leaves small, shrunken into curly, fragile, lack of leaf cuticle, no matter the wrong functional pores, not only of palisade tissue, sponge tissue. 12. rapid propagation in vitro: using cell regene