Changes of main secondary metabolites in leaves of Ginkgo biloba

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• 作者：Xingyuan HE ; Wei HUANG ; Wei CHEN ; Tian DONG ; Changbing LIU ; Zhenju CHEN ; Sheng XU ; Yanan RUAN
• 关键词：Ginkgo biloba ; elevated O₃ concentration ; open-top-chamber ; secondary metabolites
• 刊名：Journal of Environmental Sciences
• 出版年：2009
• 出版时间：2009
• 年：2009
• 卷：21
• 期：2
• 页码：199-203
• 全文大小：210 K

文摘

To investigate the effect of elevated O₃ on the accumulation of main secondary metabolites in leaves of Ginkgo biloba L., four-year-old trees were exposed in open-top chambers with ambient air and the air with twice ambient O₃ concentration in Shenyang in 2006. Elevated O₃ increased the concentrations of terpenes, but decreased the concentrations of phenolics in G. biloba leaves. The results showed that secondary compounds from G. biloba leaves responded to the elevated O₃ exposure in a different way when compared to previous studies which showed elevated O₃ increased the concentrations of phenolics but had no effect on the terpenes in leaves of other deciduous trees. Furthermore, reduced synthesis of phenolics may decrease the resistance of G. biloba to O₃ and other environmental factors. On the other hand, the induced synthesis of terpenes may enhance the antioxidant abilities in G. biloba leaves at the end of O₃ fumigation.