Polycyclic Aromatic Hydrocarbons and Polychlorinated Biphenyls in Coastal Environments of Valdivia and Valparaíso, Chile

Palma-Fleming, Hernán; Cornejo, Carlos; González, Myriam; Pérez, Viviana; González, Marta González; Gutierrez, Elena; Sericano, José L.; Seeger, Michael

doi:10.4067/s0717-97072008000200020

Cited by 21 publications

(9 citation statements)

References 40 publications

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“…Gram-positive bacteria are more commonly observed in organic rich habitats (Fenical, 1993 ). Water samples from Valparaíso Bay are influenced by contamination with polycyclic aromatic hydrocarbons as well as with heavy metals (Campos et al, 1987 ; Palma-Fleming et al, 2008 ; Fuentes et al, 2015 ). It can also be influenced by hydrographic features such as seasonal upwelling which can supply nutrients to shallow waters (Capone and Hutchins, 2013 ).…”

Section: Discussionmentioning

confidence: 99%

Exploring the Diversity and Antimicrobial Potential of Marine Actinobacteria from the Comau Fjord in Northern Patagonia, Chile

Undabarrena

Beltrametti²,

Claverías

et al. 2016

Front. Microbiol.

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Bioprospecting natural products in marine bacteria from fjord environments are attractive due to their unique geographical features. Although, Actinobacteria are well known for producing a myriad of bioactive compounds, investigations regarding fjord-derived marine Actinobacteria are scarce. In this study, the diversity and biotechnological potential of Actinobacteria isolated from marine sediments within the Comau fjord, in Northern Chilean Patagonia, were assessed by culture-based approaches. The 16S rRNA gene sequences revealed that members phylogenetically related to the Micrococcaceae, Dermabacteraceae, Brevibacteriaceae, Corynebacteriaceae, Microbacteriaceae, Dietziaceae, Nocardiaceae, and Streptomycetaceae families were present at the Comau fjord. A high diversity of cultivable Actinobacteria (10 genera) was retrieved by using only five different isolation media. Four isolates belonging to Arthrobacter, Brevibacterium, Corynebacterium and Kocuria genera showed 16S rRNA gene identity <98.7% suggesting that they are novel species. Physiological features such as salt tolerance, artificial sea water requirement, growth temperature, pigmentation and antimicrobial activity were evaluated. Arthrobacter, Brachybacterium, Curtobacterium, Rhodococcus, and Streptomyces isolates showed strong inhibition against both Gram-negative Pseudomonas aeruginosa, Escherichia coli and Salmonella enterica and Gram-positive Staphylococcus aureus, Listeria monocytogenes. Antimicrobial activities in Brachybacterium, Curtobacterium, and Rhodococcus have been scarcely reported, suggesting that non-mycelial strains are a suitable source of bioactive compounds. In addition, all strains bear at least one of the biosynthetic genes coding for NRPS (91%), PKS I (18%), and PKS II (73%). Our results indicate that the Comau fjord is a promising source of novel Actinobacteria with biotechnological potential for producing biologically active compounds.

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Section: Discussionmentioning

confidence: 99%

Exploring the Diversity and Antimicrobial Potential of Marine Actinobacteria from the Comau Fjord in Northern Patagonia, Chile

Undabarrena

Beltrametti²,

Claverías

et al. 2016

Front. Microbiol.

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“…The Corral Bay area, XIV Region of Chile, is located at the mouth of the Valdivia and Tornagaleones estuaries (39°S, 73°18'W). The bay is about 15 km downstream of the Valdivia city, and during the last decades its environment has been altered mainly through anthropogenic influences 18 . More recently, the area has undergone dramatic changes due to increasing environmental-related activities that include waste water emissions, industrial and domestic solid and liquid wastes, aerial emissions, cattle and agriculture activities, intentional and unintentional oil spills from motor driven boats and ships.…”

Section: Introductionmentioning

confidence: 99%

Temporal and Spatial Trends of Total Aliphatic Hydrocarbons of Diesel Range and Trace Elements in Sediments and Mussels of the Corral Bay Area, Valdivia, South Central Chile

Palma-Fleming¹,

R²,

Campillay³

et al. 2012

J. Chil. Chem. Soc.

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Sediments and mussel specimens of Mytilus chilensis were analyzed for organic pollutant fingerprints and heavy metals in the Corral Bay area of Valdivia, South Central Chile during the period [2003][2004]. GC-MS analysis show hydrocarbon fingerprints corresponding mainly to mixed inputs of aliphatic hydrocarbons of the TPH-diesel fraction and biogenic hydrocarbons, indicating low to medium contamination by petroleum hydrocarbons with high biodegradation of petroleum in sediments at Las Coloradas, La Escuela and Corral Bay (C 17 /Pri < 1 and C 18 /Phy < 1). Mussel TPH fingerprints show weathered hydrocarbons resulting in a zone of increased concentration of cyclic respect to acyclic aliphatic components (UCM), indicating the presence of petroleum hydrocarbons. No temporal variation the in concentration of TPH-diesel found in sediments as well as mussels were observed except for samples collected during January 2004. TPH concentration levels in the sediments varied from 0.4 µgg -1 to 33.8 µgg -1 d.w. whereas in mussels varied between 61 µg g -1 and 287 µgg -1 d.w. Heavy metals were also analyzed by atomic absorption spectrometry and low concentration as well as no seasonal variations of concentration were found in mussels at each sampling point and a relatively even distribution of metals among stations was observed. Maximum concentrations in all sampling points of sediments were found for Fe (24128-43791 µgg -1 ) and Mn (181-388 µgg -1 ) while the minimum concentration was found for Pb (nd-12 µgg). According to the Sediment Quality Guidelines (SQGs-NOAA), the concentration levels of Cu and As in all sediment sampling points are above the "Effects Range-Low" (ERL), indicating that there may be a probable toxicity effect over the biota and attention must be paid on a moderate range of priority.

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“…s-triazines) and polychlorobiphenyls are POPs that are widely distributed in the environment. In recent years, s-triazine herbicides and PCBs have been detected in aquatic systems in Central and Southern Chile (Cooman et al, 2005;Palma-Fleming et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Bacterial Degradation and Bioremediation of Chlorinated Herbicides and Biphenyls

Seeger

Hernández

Méndez

et al. 2010

J. Soil Sci. Plant Nutr.

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Chlorinated herbicides (e.g. s-triazines) and polychlorobiphenyls (PCBs) are persistent organic pollutants (POPs) that are widely distributed in the environment. s-Triazine herbicides are used in agriculture and forestry in diverse regions of the world. PCBs were produced worldwide for industrial applications, and an important amount of these compounds have been released into the environment. PCBs and s-triazines are toxic compounds that could act as endocrine disrupters and cause cancer. Therefore, environmental pollution with s-triazines and PCBs is of increasing concern. Bioremediation is an attractive technology for the decontamination of polluted sites. Microorganisms play a main role in the removal of POPs from the environment. Diverse bacteria able to degrade s-triazines and PCBs have been characterized. Bacterial degradation of s-triazine herbicides involves hydrolytic reactions catalyzed by amidohydrolases encoded by the atz genes. Anaerobic and aerobic bacteria are capable of biotransforming PCBs. Higher chlorinated PCBs are subjected to reductive dehalogenation by anaerobic microorganisms. Lower chlorinated biphenyls are oxidized by aerobic bacteria. Genome analyses of PCB-degrading bacteria have increased the knowledge of their metabolic capabilities and their adaptation to stressful conditions. For the removal of s-triazines and PCBs from the environment, efficient bioremediation processes have to be established. In this report, bacterial degradation of s-triazines and PCBs is described and novel strategies to improve bioremediation of these POPs are discussed.

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Polycyclic Aromatic Hydrocarbons and Polychlorinated Biphenyls in Coastal Environments of Valdivia and Valparaíso, Chile

Cited by 21 publications

References 40 publications

Exploring the Diversity and Antimicrobial Potential of Marine Actinobacteria from the Comau Fjord in Northern Patagonia, Chile

Exploring the Diversity and Antimicrobial Potential of Marine Actinobacteria from the Comau Fjord in Northern Patagonia, Chile

Temporal and Spatial Trends of Total Aliphatic Hydrocarbons of Diesel Range and Trace Elements in Sediments and Mussels of the Corral Bay Area, Valdivia, South Central Chile

Bacterial Degradation and Bioremediation of Chlorinated Herbicides and Biphenyls

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