1. College of Agronomy and Biotechnology, Hebei Normal University of Science and Technology, Qinhuangdao 066000, PR China
2. Hebei Key Laboratory of Crop Stress Biology (in preparation), Hebei Normal University of Science and Technology, Qinhuangdao 066000, PR China
3. Analysis and Testing Center, Hebei Normal University of Science and Technology, Qinhuangdao 066000, PR China
4. Hebei Key Laboratory of Active Components and Functions in Natural Products (under planning), Hebei Normal University of Science and Technology, Qinhuangdao, 066004, PR China