浮萍（Lemna minor）和斜生栅藻（Scenedesmus obliquus）暴露于除草剂氟草烟嗪时不同生理参数响应的比较。
Comparison of different physiological parameter responses in Lemna minor and Scenedesmus obliquus exposed to herbicide flumioxazin.
作者信息
Geoffroy Laure, Frankart Cécile, Eullaffroy Philippe
机构信息
Laboratoire d'Eco-Toxicologie, Unité de recherche Vignes et Vins de Champagne, UPRES-EA 2069, Université de Reims Champagne-Ardenne BP 1039, F51687 Reims 2, France.
出版信息
Environ Pollut. 2004 Sep;131(2):233-41. doi: 10.1016/j.envpol.2004.02.021.
The sensitivity of different physiological parameters in Scenedesmus obliquus and Lemna minor exposed to herbicide (flumioxazin) was investigated to indicate the most convenient and sensitive parameter. To assess toxicity of flumioxazin, we used a panel of biomarkers: pigment contents, chlorophyll fluorescence parameters and antioxidative enzyme activities. Algae and duckweed were exposed to 48-h IC50 for growth rate. In L. minor, the sensitivity of the parameters was as follows: QN > Oxygen emmision > phiS(PSII) > QP > phi(PSII) > CAT, GR > Pigment> APO > Growth. For S. obliquus, this ranking was as follows: CAT > Oxygen emission > QP > APO > GR > Pigment > phiS(PSII) > Growth > phi(PSII) > QN (from the greatest to the least sensitive). The results demonstrated that the observed toxicity is related not only to interspecific variations but also to the selected parameter.
研究了斜生栅藻和浮萍暴露于除草剂（氟草嗪）时不同生理参数的敏感性，以确定最便捷和敏感的参数。为评估氟草嗪的毒性，我们使用了一组生物标志物：色素含量、叶绿素荧光参数和抗氧化酶活性。藻类和浮萍暴露于生长率的48小时半数抑制浓度（IC50）。在浮萍中，参数的敏感性如下：非光化学猝灭（QN）＞氧气释放＞PSII有效光化学量子产量（phiS(PSII)）＞光化学猝灭系数（QP）＞PSII实际光化学量子产量（phi(PSII)）＞过氧化氢酶（CAT）、谷胱甘肽还原酶（GR）＞色素＞抗过氧化物酶（APO）＞生长。对于斜生栅藻，此排名如下：CAT＞氧气释放＞QP＞APO＞GR＞色素＞phiS(PSII)＞生长＞phi(PSII)＞QN（从最敏感到最不敏感）。结果表明，观察到的毒性不仅与种间差异有关，还与所选参数有关。
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