1. Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan, China;
2. National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Collaborative Innovation Centre of Utilisation of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan, China;
3. College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan, China