Influence of soil moisture on linear alkylbenzene sulfonate‐induced toxicity in ammonia‐oxidizing bacteria

Nielsen, Klaus B.; Brandt, Kristian K.; Jacobsen, Anne; Mortensen, G.K.; Sørensen, Jan

doi:10.1897/03-156

Cited by 5 publications

(1 citation statement)

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“…The application of sewage sludge as agricultural fertilizer is the major cause of LAS occurrence in soils (Painter 1992;Ying 2006). Several physical and chemical factors such as temperature, oxygen supply, water content, the amount of LAS applied, and its molecular characteristics (length of chain and position of benzene ring) may condition the toxicity and levels of biodegradation of LAS in a soil ecosystem (Knaebel et al 1990;Nielsen et al 2004). Currently, the EU legislation does not mark a cut-off value for the amount of LAS permitted in sludge used for agricultural fertilization.…”

Section: Introductionmentioning

confidence: 99%

Effect of linear alkylbenzene sulfonates on the growth of aerobic heterotrophic cultivable bacteria isolated from an agricultural soil

et al. 2008

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An enrichment culture technique was used to isolate soil bacteria capable of growing in the presence of two different concentrations of linear alkylbenzene sulfonates (LAS) (10 and 500 lg ml -1 ). Nine bacterial strains, representatives of the major colony types of aerobic heterotrophic cultivable bacteria in the enriched samples, were isolated and subsequently identified by PCR-amplification and partial sequencing of the 16S rRNA gene. Amongst the isolates, strains LAS05 (Pseudomonas syringae), LAS06 (Staphylococcus epidermidis), LAS07 (Delftia tsuruhatensis), LAS08 (Staphylococcus epidermidis) and LAS09 (Enterobacter aerogenes), were able to grow in pure culture in dialysed soil media amended with LAS (50 lg ml -1 ). The three Gramnegative strains grew to higher cell numbers in the presence of 50 lg ml -1 of LAS, compared to LAS-unamended dialysed soil medium, and were selected for further testing of their ability to use LAS as carbon source. However, HPLC analysis of culture supernatants showed that the three strains can tolerate but not degrade LAS when grown in pure cultures. A higher concentration of soluble phosphates was recorded in dialysed soil media amended with LAS (50 lg ml -1 ) compared to unamended control media, suggesting an effect of the surfactant that enhanced the bioavailability of P from soil. The presence of LAS at a concentration of 50 lg ml -1 had an important impact on growth of selected aerobic heterotrophic soil bacteria, a deleterious effect which may be relevant for the normal function and evolution of agricultural soil.

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Section: Introductionmentioning

confidence: 99%

Effect of linear alkylbenzene sulfonates on the growth of aerobic heterotrophic cultivable bacteria isolated from an agricultural soil

et al. 2008

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Improvement of ecological sustainability of in situ bioremediation through coordinated approaches

Patel

Yadav

Verma

et al. 2022

Microbial Resource Technologies for Sustainable Development

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Integrative approaches for assessing the ecological sustainability ofin situbioremediation

2009

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Application of microbial metabolic potential (bioremediation) is accepted as an environmentally benign and economical measure for decontamination of polluted environments. Bioremediation methods are generally categorized into ex situ and in situ bioremediation. Although in situ bioremediation methods have been in use for two to three decades, they have not yet yielded the expected results. Their limited success has been attributed to reduced ecological sustainability under environmental conditions. An important determinant of sustainability of in situ bioremediation is pollutant bioavailability. Microbial chemotaxis is postulated to improve pollutant bioavailability significantly; consequently, application of chemotactic microorganisms can considerably enhance the performance of in situ degradation. The environmental fate of degradative microorganisms and the ecological consequence of intervention constitute other important descriptors for the efficiency and sustainability of bioremediation processes. Integrative use of culture-dependent, culture-independent methods (e.g. amplified rDNA restriction analysis, terminal restriction fragment length polymorphism, denaturing/thermal gradient gel electrophoresis, phospholipid fatty acid, etc.), computational and statistical analyses has enabled successful monitoring of the above aspects. The present review provides a detailed insight into some of the key factors that affect the efficiency of in situ bioremediation along with a comprehensive account of the integrative approaches used for assessing the ecological sustainability of processes. The review also discusses the possibility of developing suicidal genetically engineered microorganisms for optimized and controlled in situ bioremediation.

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Influence of soil moisture on linear alkylbenzene sulfonate‐induced toxicity in ammonia‐oxidizing bacteria

Cited by 5 publications

References 44 publications

Effect of linear alkylbenzene sulfonates on the growth of aerobic heterotrophic cultivable bacteria isolated from an agricultural soil

Effect of linear alkylbenzene sulfonates on the growth of aerobic heterotrophic cultivable bacteria isolated from an agricultural soil

Improvement of ecological sustainability of in situ bioremediation through coordinated approaches

Integrative approaches for assessing the ecological sustainability ofin situbioremediation

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