1. Kutchan, T. M. (1995). Alkaloid biosynthesis—The basic for metabolic engineering of medicinal plants. The Plant Cell, 7, 1059–1070.
2. Wu, N. H. (1998). Principle of gene engineering(2nd ed.). Beijing: Science Press.
3. Hao, F. Y., Zhu, Y. X., Zhu, S. G., et al. (1998). Experimental techniques of molecular biology. Beijing: Peking University Press.
4. Chen, Z. L. (1994). Plant gene engineering. Changchun: Jilin Scientific and Technical Press.
5. Xie, Y. J. (1992). An introduction to genetic engineering. Beijing: Beijing Agricultural University Press.