1. State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, 130 Changjiang West Road, Hefei, Anhui 230036, P.R. China; E-mail: fengguo@ahau.edu.cn (F. G.), yyq_lyh@126.com (Y. Y.), xcwan@ahau.edu.cn (X. C. W.)
2. Department of Applied Chemistry, Anhui Agricultural University, Hefei, Anhui 230036, P.R. China