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首页> 外文期刊>Environmental Science & Technology >Enantioselective Physiological Effects of the Herbicide Diclofop on Cyanobacterium Microcystis aeruginosa
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Enantioselective Physiological Effects of the Herbicide Diclofop on Cyanobacterium Microcystis aeruginosa

机译：除草剂双氯酚对铜绿微囊藻的对映体生理作用

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摘要

Water blooms caused by cyanobacteria are currently major global environmental issues. The outbreaks induced by nutrient elements have attracted much attention; however, the effects of environmental pollutants on the cyanobacteria are themselves poorly understood, especially those due to chiral chemicals. To explore the enantioselective eco-effects of the chiral herbicide diclofop-methyl (DM) and its major metabolite diclofop acid (DA), the physiological characteristics of Microcystis aeruginosa were investigated. The results showed that using both biomass and protein content as growth parameters is necessary to access the impact of the herbicides, that stimulation biomass production by R-DA and S-DA was apparent (nonessential), and that the concentration of 5 mg/L is worth noting. Ultrastructure changes in gas vacuoles, thyiakoids, glycogen, cyanophycin granules, poly beta- hydroxybutyrate, polyhedral body, and lipids indicated different toxicity modes among the four chemicals. The different effects between R-DA and S-DA demonstrated that R-DA probably acts as a proton ionophore shuttling protons across the plasmalemma, whereas S-DA did not demonstrate such action. The toxicity order in the present study is S-DA ＜ R-DA ＜ DM ＜ DA. Stimulation of the growth of At aeruginosa during the first 3 days by herbicidally inactive S-DA was greater than that due to R-DA, which is adverse to water quality in water bodies. Therefore, using the herbiddally active R-enantiomer is recommended. These results are helpful in understanding the enantioselective effects of chiral pesticides on cyanobacteria, which is important for environmental assessment and protection. It is also helpful for guiding the application of chiral pesticides in agricultural settings.
机译：目前，由蓝细菌引起的水华是全球主要的环境问题。营养元素引起的暴发引起了广泛关注。然而，人们对环境污染物对蓝细菌的影响本身知之甚少，尤其是由于手性化学物质造成的影响。为了探索手性除草剂二氯双氯芬（DM）及其主要代谢物双氯氟酸（DA）的对映选择性生态效应，研究了铜绿微囊藻的生理特性。结果表明，使用生物量和蛋白质含量作为生长参数对于获得除草剂的影响是必要的，R-DA和S-DA刺激的生物量生产是明显的（无关紧要），且浓度为5 mg / L值得注意的是。气体液泡，类囊体，糖原，蓝霉素颗粒，聚β-羟基丁酸酯，多面体和脂质的超微结构变化表明四种化学物质的毒性模式不同。 R-DA和S-DA之间的不同作用表明，R-DA可能充当质子离子载体穿梭质子穿越质膜，而S-DA并未证明这种作用。本研究的毒性顺序为S-DA ＜R-DA ＜DM ＜DA。除草活性S-DA在头3天对铜绿假单胞菌的生长刺激大于对R-DA的刺激，这不利于水体中的水质。因此，建议使用具有草药活性的R-对映体。这些结果有助于理解手性农药对蓝细菌的对映选择性，这对环境评估和保护很重要。这也有助于指导手性农药在农业领域的应用。

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  • 来源
    《Environmental Science & Technology》 |2013年第8期|3893-3901|共9页
  • 作者

    Jing Ye; Lumei Wang; Zhijian Zhang; Weiping Liu;

  • 作者单位

    School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China,MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Natural Research and Environmental Sciences,Zhejiang University, Hangzhou 310058, China,Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Shanghai Jiao Tong University, Shanghai 200240, China;

    Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Shanghai Jiao Tong University, Shanghai 200240, China;

    MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Natural Research and Environmental Sciences,Zhejiang University, Hangzhou 310058, China;

    MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Natural Research and Environmental Sciences,Zhejiang University, Hangzhou 310058, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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