NDLI: Adaptations in microbiological populations exposed to dinitrophenol and other chemical stressors.

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Adaptations in microbiological populations exposed to dinitrophenol and other chemical stressors.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ray, Sujata Peters, Catherine A.
Description	Country affiliation: India Author Affiliation: Ray S ( Department of Civil Engineering, Indian Institute of Technology, Guwahati, Guwahati, Assam 781 039, India.)
Abstract	Microbiological populations in natural and engineered systems may experience multiple exposures to chemical stressors, which may affect system functions. The impact of such exposures on the metabolism of a population of Pseudomonas aeruginosa was studied using respirometry. Two serial exposures to low concentrations of 2,4-dinitrophenol (DNP), pentachlorophenol (PCP), or N-ethyl maleimide (NEM) did not affect metabolism beyond that expected for a single exposure. However, at higher concentrations, three exposures to DNP led to a combination of metabolic stress and resilience in the population. At a low DNP concentration of 400 mg/L, multiple exposures led to increased stress but indicated no development of resilience. At a high DNP concentration of 1,200 mg/L, no biological activity was observed, indicating that the population did not survive the exposure. At intermediate concentrations of 800 and 900 mg/L DNP, stress was observed, but it was found to decrease after multiple exposures. This, combined with the observation that the size of the population decreased, indicated that resilience in the population had developed because of elimination of the weaker organisms in the population. In contrast, the lack of resilience at the lower DNP concentration was attributed to the survival of the strong as well as weak members, lowering the resilience of the population as a whole. The development of resilience within a window of stressor concentrations is an important finding with implications for predicting the performance of biotreatment processes and biosensor technologies and for interpreting ecotoxicity risk assessments.
File Format	HTM / HTML
ISSN	07307268
Issue Number	10
Volume Number	29
e-ISSN	15528618
Journal	Environmental Toxicology and Chemistry
Language	English
Publisher	Wiley
Publisher Date	2010-10-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Water Pollutants, Chemical Research Support, U.s. Gov't, Non-p.h.s. Soil Pollutants Dinitrophenols Toxicity Soil Microbiology Discipline Environmental Health Discipline Toxicology Biomass Chromatography, High Pressure Liquid Journal Article Discipline Chemistry Water Microbiology
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis

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