Funding for this research was provided by:
Singapore Ministry of Education Academic Research Fund (R-143-000-583-112)
National University of Singapore (R-143-000-561-133)
NSFC (31371851)
NSFC (31471605, 31200801)
Natural Science Foundation of Jiangsu Province (CN) (BK20141220)
Applied Basic Research Project (Agricultural) Suzhou Science and Technology Planning Programme (SYN201522)