桐花树幼苗叶片生理生态指标对气态汞胁迫的响应-生态毒理学报.PDFVIP

２０１６年　 第 １１卷 生 态 毒 理 学 报 Vol. 11, 2016 第２期ꎬ２１６￣２２２ Asian Journal of Ecotoxicology No.2, 2 16￣222 DOI: 10.7524/AJE.1673￣5897.20151127003 袁俊, 丁振华. 桐花树幼苗叶片生理生态指标对气态汞胁迫的响应[J]. 生态毒理学报ꎬ2016, 11(2): 2 16￣222 Yuan J, Ding Z H. Physiological response of Aegiceras corniculatum leaves to Hg0 stress [J]. Asian Journal of Ecotoxicology, 2016, 11(2): 2 16￣222 (in Chinese) 桐花树幼苗叶片生理生态指标对气态汞胁迫的响应 袁俊ꎬ 丁振华* 厦门大学环境与生态学院ꎬ厦门361100 : : 收稿日期 2015￣11￣27 　 　 录用日期 2016￣1￣6 摘要:桐花树是我国主要的广布种红树植物ꎬ具有泌盐性ꎮ 通过胁迫实验ꎬ研究桐花树幼苗叶片生理生态指标对气态单质汞 0 (Hg )胁迫的响应ꎬ以期了解红树植物吸收和富集气态汞的机制ꎮ 结果表明:气态汞胁迫造成桐花树叶片可溶性糖含量、过氧 化物酶(POD)活性下降ꎻ而丙二醛(MDA) 、脯氨酸、超氧化物歧化酶(SOD)等指标上升ꎻ叶绿素含量、过氧化氢酶(CAT)活性出现 0 先升高后降低的趋势ꎬ还原型谷胱甘肽(GSH)含量则先降低后升高ꎮ 总之ꎬ虽然Hg 胁迫可增加桐花树幼苗叶的膜质过氧化程 度ꎬ影响其生理代谢活动ꎬ但其叶片可通过调节抗氧化酶活性及还原型谷胱甘肽含量来提高自身抗氧化能力ꎬ进而提高对Hg0 的抗性ꎮ 关键词:气态单质汞ꎻ桐花树ꎻ生理指标ꎻ抗性 文章编号:1673￣5897 (2016 )2￣216￣07　 　 中图分类号:X 171.5　 　 文献标识码:A ０ Ｐｈｙｓｉｏｌｏｇｉｃａｌ Ｒｅｓｐｏｎｓｅ ｏｆＡｅｇｉｃｅｒａｓ ｃｏｒｎｉｃｕｌａｔｕｍ Ｌｅａｖｅｓ ｔｏ Ｈｇ Ｓｔｒｅｓｓ * Yuan Jun, Ding Zhenghua College of the Environment and Ecology, Xiamen University, Xiamen 361100, China Ｒｅｃｅｉｖｅｄ27 November 2015　 　 ａｃｃｅｐｔｅｄ 6 January 2016 Ａｂｓｔｒａｃｔ:As one of the main widespread mangrove plants in China, Aegiceras corniculatum can tolerate salt by excreting salt.　 Mangroves are facing more and more serious heavy metal pollution, especially the mercury con￣ tamination . To investigate the mechanism of mercury absorption and tolerance of mangrove, stress experiments were conducted with Aegiceras corniculatum seedlings under Hg0 stress. In this experiment, physiological