Grollier T, Feurtet-Mazel A, Boudou A, Ribeyre F
Laboratoire d'Ecotoxicologie, Université Bordeaux I/CNRS, Talence, France.
Ecotoxicol Environ Saf. 1997 Apr;36(3):205-12. doi: 10.1006/eesa.1996.1496.
The effects of temperature on the bioaccumulation of the phenylurea herbicide isoproturon (IPU) and on the growth inhibition induced on two freshwater rooted macrophytes--Elodea densa and Ludwigia natans--were investigated using indoor microcosms. The experimental protocol was based on five temperatures (12, 16, 20, 24, and 28 degrees C) and two contamination levels of the water column (30 and 60 micrograms IPU.liter-1), plus a control condition. Variations in temperature had little effect on the decrease in [IPU] in the water column during the 21-day experiment. The IPU concentration in the two macrophyte species was not significantly modified by the large range of temperatures when results were expressed using the concentration criterion. IPU burdens in the E. densa cuttings, on the other hand, increased significantly when the temperature rose from 12 to 28 degrees C; small differences were observed between the two exposure conditions, in relation to the antagonistic effects of IPU and temperature on the growth of the cuttings. Bioconcentration factors in the plants (stems + leaves) were close to 10 and 13 after exposure to 30 and 60 micrograms IPU.liter-1, respectively.
利用室内微观生态系统，研究了温度对苯基脲类除草剂异丙隆（IPU）生物累积的影响，以及对两种淡水生根大型植物——伊乐藻和黄花水龙生长抑制的影响。实验方案基于五个温度（12、16、20、24和28摄氏度）和水柱的两个污染水平（30和60微克IPU·升-1），外加一个对照条件。在为期21天的实验中，温度变化对水柱中[IPU]的降低影响不大。当使用浓度标准表示结果时，大范围的温度对两种大型植物物种中的IPU浓度没有显著影响。另一方面，当温度从12摄氏度升至28摄氏度时，伊乐藻插条中的IPU负荷显著增加；在两种暴露条件之间观察到微小差异，这与IPU和温度对插条生长的拮抗作用有关。暴露于30和60微克IPU·升-1后，植物（茎+叶）中的生物浓缩系数分别接近10和13。
