1. Department of Plant and Microbial Biology; North Carolina State University; Raleigh NC USA
2. Research Center of Chinese Herbal Resource Science and Engineering; Guangzhou University of Chinese Medicine; Guangzhou China
3. Institute of Botany; Chinese Academy of Sciences; Beijing China
4. Institute of Genetics and Developmental Biology; Chinese Academy of Sciences; Beijing China
5. University of Chinese Academy of Sciences; Beijing China
6. Institute of Pharmaceutical Biology; Technical University Braunschweig; Braunschweig Germany