Absorption and accumulation of polycyclic aromatic hydrocarbons (PAHs) in tea plant and its effect on chemical components in tea leaves

HE Wei, TU Youying, LIN Daohui, YANG Liangcheng

College of Agriculture and Biotechnology, Hangzhou 310029, China

Abstract: The absorption and accumulation of phenanthrene and pyrene in tea plant and the effects of those pollutants on the main tea components were studied and analyzed by water solution culture of tea plant for 10 days. The results showed that the highest concentrations of phenanthrene and pyrene were found in fiber roots when the 1mg/L of phenanthrene and 0.1mg/L of pyrene were used in the water solution and that 0.221 mg/gDW and 0.107mg/gDW in the tea fiber roots, respectively. The content of phenanthrene  was 0.007 mg/gDW in the stem and and 0.003 mg/gDW in leaves.  Pyrene was not detected in the stem and leaf. However, tea catechins in the leaves by 35.13% and amino acids decreased.

Key words: Tea plant, water culture, PAHs, absorption, chemical compounds 

多环芳烃的吸收累积对茶叶化学成分的影响*

何炜1 屠幼英1 林道辉2 杨良城2

（1.浙江大学农业与生物技术学院 杭州 310029； 2.浙江大学环境资源学院 杭州 310026）

摘要 通过水培试验，研究分析了两种多环芳烃（PAHs）物质（菲和芘）在茶树体内的吸收、累积和转移,以及对茶叶体内几种有效化学成分的影响。结果表明，当营养液中菲和芘处理浓度为1.00mg/L和0.10mg/L时，茶树须根中菲和芘浓度最高,为2.21×10-1mg/g干重（DW）和1.07×10-1mg/g DW；菲在茶树茎中最高含量7.00×10-3mg/g DW，叶片中含量为3.10×10－4mg/g鲜重(FW)，芘在茎和叶中则均未检测到。菲和芘对茶树乌牛早品种叶片内化学成分影响显著，菲和芘单独处理后，茶树叶片内儿茶素总量最高分别上升35.13％和46.56％；菲和芘的混合处理中儿茶素总量最高增加48.23％，多酚和咖啡碱含量也有明显升高。然而，菲和芘处理后茶树叶片内氨基酸含量下降。

关键词 茶叶；水培； 多环芳烃；吸收累积；化学成分

中图分类号：S571.1 文献标识码：A 文章编号：0577-8921(2005)04-220-04

*本研究为浙江省自然科学基金资助项目(NO.403041)

收稿日期：2005-04-07 修改稿收稿日期：2005－09－05

作者简介：何炜，男（1980年－），安徽安庆人，浙江大学茶学系硕士研究生，主要从事茶叶化学与综合利用研究。

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