1. Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, Shaoguan University, Shaoguan 512005, China
2. Guangdong Key Laboratory for New Technology Research of Vegetables, Vegetable Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
3. School of Biology and Agriculture, Shaoguan University, Shaoguan 512005, China
4. School of Food, Shaoguan University, Shaoguan 512005, China