Responses of Total Flavonoid Yield in Erigeron Breviscapus (Vant.) Hand.–Mazz. to Enhanced UV-B Radiation
Responses of total flavonoid yield in Erigeron breviscapus (Vant.) Hand.-Mazz. to enhanced ultraviolet-B (UV-B, 280-315 nm) were studied through simulation experiment under greenhouse conditions. The supplemental UV-B radiation levels were 0, 2.5, 5.0 and 7.5 kJ·m-2, which were provided by UV-B lamps, simulating depletion of 10%, 20% and 30% stratospheric ozone at Kunming (25° N, 1950 m). At physiological maturity, total biomass and biomasses of leaf, stem, root and seed increased significantly (p< 0.05), whilst flower biomass increased significantly only under 7.5 kJ·m-2 UV-B radiation (p< 0.05). Chlorophyll content significantly decreased at 30 days of UV-B radiation (p< 0.05), but that subsequently increased significantly at 60 and 90 days (p< 0.05). UV-B radiation had sgnificant effect on MDA content (p< 0.05), and significant increase in PAL activity and total flavonoid content of leaf (p< 0.05). At physiological maturity, total flavonoid contents of various plant parts were different, highest total flavonoid content was observed in flower. Total flavonoid yield (dry mass ×total flavonoid content) of leaf, stem, root and seed significantly increased under UV-B radiation (p< 0.05), respectively, resulting in significant increase in total flavonoid yield of the whole plant. E. Breviscapus has greater UV-B resistance by significant accumulation of total flavonoid yield, which was contributed from higher biomass and higher total flavonoid content.
erigeron breviscapus (Vant.) Hand.- Mazz. biomass physiology total flavonoid content total flavonoid yield ultraviolet-B (UV-B)
FENG Yuan ZU Yanqun ZHU Yuan YANG Shengchao HE Yongmei LI Yuan
College of Resources and Environment,Yunnan Agriculture University College of Agronomy and Biotechnology,Yunnan Agriculture University,Kunming 650201,Yunnan,China
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
2426-2431
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）