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Response of soil microbial activities and microbial community structure to vanadium stress.

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Τίτλος: Response of soil microbial activities and microbial community structure to vanadium stress.
Συγγραφείς: Xiao, Xi-Yuan1, Wang, Ming-Wei1, Zhu, Hui-Wen1, Guo, Zhao-Hui1 zhguo@csu.edu.cn, Han, Xiao-Qing1, Zeng, Peng1
Πηγή: Ecotoxicology & Environmental Safety. Aug2017, Vol. 142, p200-206. 7p.
Θεματικοί όροι: Soil microbial ecology, Vanadium compounds, Urease genetics, Polymerase chain reaction methodology, Denaturing gradient gel electrophoresis, Standards
Περίληψη: High levels of vanadium (V) have long-term, hazardous impacts on soil ecosystems and biological processes. In the present study, the effects of V on soil enzymatic activities, basal respiration (BR), microbial biomass carbon (MBC), and the microbial community structure were investigated through 12-week greenhouse incubation experiments. The results showed that V content affected soil dehydrogenase activity (DHA), BR, and MBC, while urease activity (UA) was less sensitive to V stress. The average median effective concentration (EC 50 ) thresholds of V were predicted using a log-logistic dose-response model, and they were 362 mg V/kg soil for BR and 417 mg V/kg soil for DHA. BR and DHA were more sensitive to V addition and could be used as biological indicators for soil V pollution. According to a polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analysis, the structural diversity of the microbial community decreased for soil V contents ranged between 254 and 1104 mg/kg after 1 week of incubation. As the incubation time increased, the diversity of the soil microbial community structure increased for V contents ranged between 354 and 1104 mg/kg, indicating that some new V-tolerant bacterial species might have replicated under these conditions. [ABSTRACT FROM AUTHOR]
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Response of soil microbial activities and microbial community structure to vanadium stress.
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  Data: <searchLink fieldCode="AR" term="%22Xiao%2C+Xi-Yuan%22">Xiao, Xi-Yuan</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wang%2C+Ming-Wei%22">Wang, Ming-Wei</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhu%2C+Hui-Wen%22">Zhu, Hui-Wen</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Guo%2C+Zhao-Hui%22">Guo, Zhao-Hui</searchLink><relatesTo>1</relatesTo><i> zhguo@csu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Han%2C+Xiao-Qing%22">Han, Xiao-Qing</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zeng%2C+Peng%22">Zeng, Peng</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Ecotoxicology+%26+Environmental+Safety%22">Ecotoxicology & Environmental Safety</searchLink>. Aug2017, Vol. 142, p200-206. 7p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Soil+microbial+ecology%22">Soil microbial ecology</searchLink><br /><searchLink fieldCode="DE" term="%22Vanadium+compounds%22">Vanadium compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Urease+genetics%22">Urease genetics</searchLink><br /><searchLink fieldCode="DE" term="%22Polymerase+chain+reaction+methodology%22">Polymerase chain reaction methodology</searchLink><br /><searchLink fieldCode="DE" term="%22Denaturing+gradient+gel+electrophoresis%22">Denaturing gradient gel electrophoresis</searchLink><br /><searchLink fieldCode="DE" term="%22Standards%22">Standards</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: High levels of vanadium (V) have long-term, hazardous impacts on soil ecosystems and biological processes. In the present study, the effects of V on soil enzymatic activities, basal respiration (BR), microbial biomass carbon (MBC), and the microbial community structure were investigated through 12-week greenhouse incubation experiments. The results showed that V content affected soil dehydrogenase activity (DHA), BR, and MBC, while urease activity (UA) was less sensitive to V stress. The average median effective concentration (EC 50 ) thresholds of V were predicted using a log-logistic dose-response model, and they were 362 mg V/kg soil for BR and 417 mg V/kg soil for DHA. BR and DHA were more sensitive to V addition and could be used as biological indicators for soil V pollution. According to a polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analysis, the structural diversity of the microbial community decreased for soil V contents ranged between 254 and 1104 mg/kg after 1 week of incubation. As the incubation time increased, the diversity of the soil microbial community structure increased for V contents ranged between 354 and 1104 mg/kg, indicating that some new V-tolerant bacterial species might have replicated under these conditions. [ABSTRACT FROM AUTHOR]
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        Value: 10.1016/j.ecoenv.2017.03.047
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        Text: English
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        StartPage: 200
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      – SubjectFull: Soil microbial ecology
        Type: general
      – SubjectFull: Vanadium compounds
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      – SubjectFull: Urease genetics
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      – SubjectFull: Polymerase chain reaction methodology
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      – SubjectFull: Denaturing gradient gel electrophoresis
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              Text: Aug2017
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              Y: 2017
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