1. Guangdong Province Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northerrn Region, Shaoguan University, Shaoguan 512005, China
2. College of Biology and Agriculture, Shaoguan University, Shaoguan 512005, China
3. College of Agriculture, Henan Agricultural University, Zhengzhou 450046, China
4. State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China