1. Hunan Provincial Key Laboratory of Phytohormones and Growth Development, Hunan Agricultural University, Changsha 410128, China
2. Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125, China
3. Michael Smith Laboratories, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
4. Department of Botany, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
5. Department of Life Science, Hunan Normal University, Changsha 410081, China