کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4487203 | 1317018 | 2006 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Copper sulphate and DCMU-herbicide treatments increase asymmetry between sister cells in the toxic cyanobacteria Microcystis aeruginosa: Implications for detecting environmental stress Copper sulphate and DCMU-herbicide treatments increase asymmetry between sister cells in the toxic cyanobacteria Microcystis aeruginosa: Implications for detecting environmental stress](/preview/png/4487203.png)
Works correlating fluctuating asymmetry with environmental stress or genetic damages have been largely reported in multicellular organisms but not in single-celled ones. We hypothesize that asymmetry analysis could also be applied to single-celled organisms, because the asymmetry between two sister cells originated from a cellular division event (same genotype in similar environment) must tend to zero in the absence of environmental or genetic perturbations. Laboratory experiments with copper sulphate and DCMU-herbicide treatments as well as experiments in a water reservoir after treatment with copper sulphate algaecide show that environmental stress increases asymmetry between sister cells of Microcystis aeruginosa (Cyanobacteria). Even low Cu2+ or DCMU doses, which were unable to reduce growth rate, considerably enlarge asymmetry with respect to untreated controls. Asymmetry between sister cells of cyanobacteria seems to be a reliable indicator of environmental perturbation. Analysis of asymmetry in single-celled organisms could become as important as fluctuating asymmetry of multicellular organisms is today.
Journal: Water Research - Volume 40, Issue 12, July 2006, Pages 2447–2451