1. Biochemistry and Molecular Biology Research Platform, College of Life Science, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China
2. Xi'an Botanical Garden of Shaanxi Province, Institute of Botany of Shaanxi Province, Xi'an, Shaanxi 710061, P.R. China
3. Shaanxi Engineering Center of Bio-resource Chemistry & Sustainable Utilization, College of Science, Northwest A&F University, Yangling, Shaanxi 712100, P.R. China