Cloning and Expression Analysis of C Function CjAGL6 Gene cDNA from Camellia japonica ‘Jinpanlizhi’ Cloning and Real-time Expression of AGL6-3 Gene from Cymbidium goeringii Cloning and Preliminary Functional Analysis of CpAGL6 Promoter from Chimonanthus praecox Cloning and Preliminary Functional Analysis of CpAGL6 Promoter from Chimonanthus praecox