NDLI: Investigation of the Acute Toxic Effect of Chlorpyrifos on Pseudomonas putida in a Sterilized Soil Environment Monitored by Microcalorimetry

Content Provider	Springer Nature Link
Author	Chen, Huilun Yao, Jun Wang, Fei Zhou, Yong Chen, Ke Zhuang, Rensheng Zaray, Gyula
Copyright Year	2009
Abstract	Chlorpyrifos (CPF) is moderately persistent in soils. In our study, microcalorimetry was introduced for the first time to explore the acute toxic effect of CPF on a Pseudomonas strain in sterilized soil. Firstly, it was determined by microcalorimetry that P. putida failed to degrade CPF. Then the acute toxicity of increasing concentrations of CPF to P. putida was determined by its temporal effects on metabolism and counts of colony forming units. Results revealed that the increase of CPF concentration could induce a decrease of the growth rate constant (k) and the total thermal effect (Q T), representing an inhibiting action on P. putida. In addition, the colony forming units (CFU) for P. putida were counted. Results showed that the number of P. putida decreased with increasing CPF dose after 18 h of incubation in sterilized soil. Interestingly, the trend of the number of CFU was similar to the growth rate constant k, whereas the trend became irregular after 36 h of incubation. This indicated that P. putida resisted and also expresses high metabolic activity during the exponential growth phase of 18 h; thereafter the microorganisms showed a certain adaptation, even declining in number and activity.
Starting Page	587
Ending Page	593
Page Count	7
File Format	PDF
ISSN	00904341
Journal	Archives of Environmental Contamination and Toxicology
Volume Number	58
Issue Number	3
e-ISSN	14320703
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-10-14
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Environmental Monitoring/Analysis Soil Science & Conservation Environmental Chemistry Environmental Health Pollution Ecotoxicology
Content Type	Text
Resource Type	Article
Subject	Pollution Health, Toxicology and Mutagenesis Medicine Toxicology

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