Biochemical traits and proteomic changes in postharvest flowers of medicinal chrysanthemum exposed to enhanced UV-B radiation.
The article studied UV-B effects on biochemical traits and proteomic changes in postharvest flowers of medicinal chrysanthemum. The experiment about UV-B effects on biochemical traits in flowers included six levels of UV-B treatments (0 (UV0), 50 (UV50), 200 (UV200), 400 (UV400), 600 (UV600) and 800 (UV800) μWcm(-2)). UV400, UV600 and UV800 treatments significantly increased the contents of hydrogen peroxide, malondialdehyde and UV-B absorbing compounds, and the activity of phenylalanine ammonia lyase enzyme over the control. The contents of chlorogenic acid and flavone in flowers were significantly increased by UV-B treatments (except for UV50 and UV800). Two-dimensional gel electrophoresis was utilized to analyze proteomic changes in flowers with or without UV-B radiation. Results indicated that 43 protein spots (>1.5-fold difference in volume) were detected, including 19 spots with a decreasing trend and 24 spots with an increasing trend, and 19 differentially expressed protein spots were successfully indentified by MALDI-TOF MS. The indentified proteins were classified based on functions, the most of which were involved in photosynthesis, respiration, protein biosynthesis and degradation and defence. An overall assessment using biochemical and differential proteomic data revealed that UV-B radiation could affect biochemical reaction and promote secondary metabolism processes in postharvest flowers.
['Yao|Xiaoqin|X|', 'Chu|Jian-Zhou|JZ|', 'Ma|Chun-Hui|CH|', 'Si|Chao|C|', 'Li|Ji-Gang|JG|', 'Shi|Xiao-Fei|XF|', 'Liu|Chao-Nan|CN|']
D002726:Chlorogenic Acid D031202:Chrysanthemum D047309:Flavones D035264:Flowers D006861:Hydrogen Peroxide D008315:Malondialdehyde D010940:Plant Proteins D040901:Proteomics D014466:Ultraviolet Rays
Postharvest flowers Chrysanthemum UV-B radiation Chlorogenic acid Flavone Proteomic analysis