1. College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, Henan 450002, P. R. China
2. Collaborative Innovation Center for Food Production and Safety of Henan Province, Zhengzhou, Henan 450002, P. R. China
3. Department of Horticulture, Oregon State University, Mid-Columbia Agricultural Research and Extension Center, 3005 Experiment Station Drive, Hood River, OR 97031, USA
4. Haoxiangni Jujube Industry Co. Ltd., Xinzheng, Henan 451100, P. R. China