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Microbial detoxification of metalaxyl in aquatic system

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Title: Microbial detoxification of metalaxyl in aquatic system
Authors: Massoud, Ahmed H.1 masoudahm@yahoo.com, Derbalah, Aly S.1 aliderbalah@yahoo.com, Belal, El-Sayed. B.2
Source: Journal of Environmental Sciences (Elsevier). Mar2008, Vol. 20 Issue 3, p262-267. 6p.
Subject Terms: *Toxins, Detoxification (Substance abuse treatment), Pseudomonas, Metabolites
Abstract: Abstract: Four microorganisms, Pseudomonas sp. (ER2), Aspergillus niger (ER6), Cladosporium herbarum (ER4) and Penicilluim sp. (ER3), were isolated from cucumber leaves previously treated with metalaxyl using enrichment technique. These isolates were evaluated for detoxification of metalaxyl at the recommended dose level in aquatic system. The effect of pH and temperature on the growth ability of the tested isolates was also investigated by measuring the intracellular protein and mycelia dry weight for bacterial and fungal isolates, respectively. Moreover, the toxicity of metalaxyl after 28 d of treatment with the tested isolates was evaluated to confirm the complete removal of any toxic materials (metalaxyl and its metabolites). The results showed that the optimum degree pH for the growth of metalaxyl degrading isolates (bacterial and fungal isolates) was 7. The temperature 30°C appeared to be the optimum degree for the growth of either fungal or bacterial isolates. The results showed that Pseudomonas sp. (ER2) was the most effective isolate in metalaxyl degradation followed by Aspergillus niger (ER6), Cladosporium herbarum (ER4) and Penicilluim sp. (ER3), respectively. There is no toxicity of metalaxyl detected in the supernatant after 28 d of treatment with Pseudomonas sp. (ER2). The results suggest that bioremediation by Pseudomonas sp. (ER2) isolate was considered to be effective method for detoxification of metalaxyl in aqueous media. [Copyright &y& Elsevier]
Copyright of Journal of Environmental Sciences (Elsevier) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Microbial detoxification of metalaxyl in aquatic system
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  Data: <searchLink fieldCode="AR" term="%22Massoud%2C+Ahmed+H%2E%22">Massoud, Ahmed H.</searchLink><relatesTo>1</relatesTo><i> masoudahm@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Derbalah%2C+Aly+S%2E%22">Derbalah, Aly S.</searchLink><relatesTo>1</relatesTo><i> aliderbalah@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Belal%2C+El-Sayed%2E+B%2E%22">Belal, El-Sayed. B.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Environmental+Sciences+%28Elsevier%29%22">Journal of Environmental Sciences (Elsevier)</searchLink>. Mar2008, Vol. 20 Issue 3, p262-267. 6p.
– Name: Subject
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  Data: *<searchLink fieldCode="DE" term="%22Toxins%22">Toxins</searchLink><br /><searchLink fieldCode="DE" term="%22Detoxification+%28Substance+abuse+treatment%29%22">Detoxification (Substance abuse treatment)</searchLink><br /><searchLink fieldCode="DE" term="%22Pseudomonas%22">Pseudomonas</searchLink><br /><searchLink fieldCode="DE" term="%22Metabolites%22">Metabolites</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: Four microorganisms, Pseudomonas sp. (ER2), Aspergillus niger (ER6), Cladosporium herbarum (ER4) and Penicilluim sp. (ER3), were isolated from cucumber leaves previously treated with metalaxyl using enrichment technique. These isolates were evaluated for detoxification of metalaxyl at the recommended dose level in aquatic system. The effect of pH and temperature on the growth ability of the tested isolates was also investigated by measuring the intracellular protein and mycelia dry weight for bacterial and fungal isolates, respectively. Moreover, the toxicity of metalaxyl after 28 d of treatment with the tested isolates was evaluated to confirm the complete removal of any toxic materials (metalaxyl and its metabolites). The results showed that the optimum degree pH for the growth of metalaxyl degrading isolates (bacterial and fungal isolates) was 7. The temperature 30°C appeared to be the optimum degree for the growth of either fungal or bacterial isolates. The results showed that Pseudomonas sp. (ER2) was the most effective isolate in metalaxyl degradation followed by Aspergillus niger (ER6), Cladosporium herbarum (ER4) and Penicilluim sp. (ER3), respectively. There is no toxicity of metalaxyl detected in the supernatant after 28 d of treatment with Pseudomonas sp. (ER2). The results suggest that bioremediation by Pseudomonas sp. (ER2) isolate was considered to be effective method for detoxification of metalaxyl in aqueous media. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Journal of Environmental Sciences (Elsevier) is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/S1001-0742(08)60041-8
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        Text: English
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        Type: general
      – SubjectFull: Detoxification (Substance abuse treatment)
        Type: general
      – SubjectFull: Pseudomonas
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      – SubjectFull: Metabolites
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      – TitleFull: Microbial detoxification of metalaxyl in aquatic system
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            NameFull: Derbalah, Aly S.
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            NameFull: Belal, El-Sayed. B.
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              Text: Mar2008
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              Y: 2008
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