1. State Key Laboratory of Agro-Biotechnology and Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, P.R. China
2. School of Life Sciences, Center for Cell and Developmental Biology and State Key Laboratory of Agro-biotechnology, The Chinese University of Hong Kong, Hong Kong, P.R. China
3. Institute of Biotechnology, Zhejiang University, Hangzhou 310058, P.R. China