Cylindrospermopsis raciborskii (Cyanobacteria) exudates: Chemical characterization and complexation capacity for Cu, Zn, Cd and Pb

Tonietto, Alessandra Emanuele; Lombardi, Ana Teresa; Vieira, Armando Augusto Henriques; Parrish, Christopher C.; Choueri, Rodrigo Brasil

doi:10.1016/j.watres.2013.10.025

Cited by 41 publications

(16 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the results also suggest that there would be other immobilization mechanisms involved in heavy metals and arsenic resistance in this organism. This hypothesis is not surprising because the complexation of heavy metals and arsenic with fatty acids and carbohydrates has been described as an important mechanism to chelate metals and metalloids in cyanobacteria …”

Section: Discussionmentioning

confidence: 99%

Use of synchrotron radiation X‐ray fluorescence and X‐ray absorption spectroscopy to investigate bioaccumulation, molecular target, and biotransformation of volcanic elements

Lamela

Pérez

et al. 2018

X-Ray Spectrometry

View full text Add to dashboard Cite

Because environment pollutants have a strong impact on ecosystems, including human health, methods of their determination and mitigation have received special attention in recent years. Taking advantage of the wide range of data that can be obtained by synchrotron radiation X‐ray fluorescence spectroscopy (SRXRF) in the field of environmental sciences, different instrumental setups were used to study the biological fates of toxic elements in volcanic environments. The elemental composition of plants, algae, and bacteria in Copahue and Domuyo volcanoes from Argentinean Patagonia was determined by SRXRF and the volcanic elements Ti, Fe, and Zn were abundant in these organisms. Interestingly, a high As concentration was found in cyanobacteria (26.2 μg/g) living in As contaminated stream (250 μg/ml). Because arsenic is toxic and human carcinogen, element‐retention capacity, element‐protein associations, and arsenic metabolism in this As resistant organism were analyzed by SRXRF. A high capacity (100–95%) of Ti > Fe > Cr > Sr > Ni > Cu > Mn > Zn > As retention was found after aqueous/alcoholic extraction assisted by ultrasonication. The cyanobacterial proteins were separated by SDS‐PAGE, electro‐transferred to nitrocellulose, and mapped by SRXRF. Defined protein bands containing Ca, Ti, Mn, Fe, and/or Zn were observed. Their ability to metabolize arsenic was revealed by combining SRXRF and X‐ray absorption near edge spectroscopy and Dimethylarsenic was found. Based on results, we speculate that these cyanobacteria could be interesting candidates for water treatment. Finally, we conclude that SRXRF is a valuable tool to study the biological cycle of environmental pollutants, including their accumulation, molecular targets, and metabolism. The SRXRF may also assist in remediation researches.

show abstract

Section: Discussionmentioning

confidence: 99%

Use of synchrotron radiation X‐ray fluorescence and X‐ray absorption spectroscopy to investigate bioaccumulation, molecular target, and biotransformation of volcanic elements

Lamela

Pérez

et al. 2018

X-Ray Spectrometry

View full text Add to dashboard Cite

show abstract

“…High molecular microalgae influence the bioavailability, form and mobility of trace metals in water and sediment in the Barra Bonita Reservoir, Brazil (Gouvêa et al 2005). More recent studies also highlight the effects of eutrophication on the uptake of different metal species by aquatic organisms and validate seasonal effects on metal speciation (Tonietto et al 2014).…”

Section: Introductionmentioning

confidence: 94%

“…), and the speciation and complexation capacity of given metals (Tonietto et al . ). Assessment of heavy metal speciation in the water column and sediments can result in a better understanding of their kinetic, partitioning and availability, as well as for predicting their biological impacts.…”

Section: Introductionmentioning

confidence: 97%

“…More recent studies also highlight the effects of eutrophication on the uptake of different metal species by aquatic organisms and validate seasonal effects on metal speciation (Tonietto et al . ).…”

Section: Introductionmentioning

confidence: 97%

“…Studies by Duan et al (2014) indicate that heavy metals have significantly accumulated from atmospheric deposition into Chinese reservoirs over past decades, which can be a major pathway, even in some cases exhibiting an absence of upstream industrial areas. The distribution of metals between the sediment matrix and the water column is regulated mainly by physicochemical parameters, primary productivity (Duan et al 2014), and the speciation and complexation capacity of given metals (Tonietto et al 2014). Assessment of heavy metal speciation in the water column and sediments can result in a better understanding of their kinetic, partitioning and availability, as well as for predicting their biological impacts.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nutrient and heavy metal storage and mobility within sediments in Kouris Reservoir, Cyprus

2017

View full text Add to dashboard Cite

The objective of this study was to evaluate the risks associated with nutrient and heavy metal pollution in the water and sediments of Kouris Reservoir in Cyprus, and to recommend applicable measures to alleviate them. The reservoir drainage area contains various historic abandoned copper mines existing in an ophiolite geological substrate. Kouris Reservoir water is classified as oligotrophic to mesotrophic, with phosphorus being the limiting factor for algae growth. The thermal stratification of the reservoir enhances anoxic conditions in the reservoir hypolimnion, initiating phosphorus release back into the water column from the lake bottom sediments. The increased phosphorus release, in combination with increased water temperatures during the summer months (i.e. reaching 27°C in August), may be the key factors enhancing the growth of microbial communities and cyanobacteria blooms. The sediment of Kouris Reservoir is classified as 'low risk' on the basis of the Ecological Risk Index scheme, in contrast to the Geoaccumulation Index, which indicates a moderate degree of contamination for chromium (Cr), nickel (Ni) and copper (Cu), and a high degree for lead (Pb). Heavy metals are strongly bound to the sediment matrix at pH values between 7 and 9, but can be released back into the water column at potential acid pH values. In addition, the sediments exhibit a high copper and chromium absorption affinity under current water quality conditions in the reservoir, as shown by batch absorption experiments. The experimental results suggest dredging of the reservoir sediment, and its subsequent dumping of the sediments near influent streams, would have adverse effects on the environment in the event of acid rain or other environmental changes that might acidify the sediment.

show abstract

Role of bacteria in the production and degradation of Microcystis cyanopeptides

et al. 2016

View full text Add to dashboard Cite

The freshwater cyanobacteria, Microcystis sp., commonly form large colonies with bacteria embedded in their mucilage. Positive and negative interactions between Microcystis species and their associated bacteria have been reported. However, the potential role of bacteria in the production and degradation of cyanobacterial secondary metabolites has not been investigated. In this study, a Microcystis‐associated bacterial community was isolated and added to the axenic M. aeruginosa PCC7806 liquid culture. After 3 years of cocultivation, we studied the bacterial genetic diversity adapted to the PCC7806 strain and compared the intra‐ and extracellular concentration of major cyanopeptides produced by the cyanobacterial strain under xenic and axenic conditions. Mass spectrometric analyses showed that the intracellular concentration of peptides was not affected by the presence of bacteria. Interestingly, the produced peptides were detected in the axenic media but could not be found in the xenic media. This investigation revealed that a natural bacterial community, dominated by Alpha‐proteobacteria, was able to degrade a wide panel of structurally varying cyclic cyanopeptides.

show abstract

Cylindrospermopsis raciborskii (Cyanobacteria) exudates: Chemical characterization and complexation capacity for Cu, Zn, Cd and Pb

Cited by 41 publications

References 59 publications

Use of synchrotron radiation X‐ray fluorescence and X‐ray absorption spectroscopy to investigate bioaccumulation, molecular target, and biotransformation of volcanic elements

Use of synchrotron radiation X‐ray fluorescence and X‐ray absorption spectroscopy to investigate bioaccumulation, molecular target, and biotransformation of volcanic elements

Nutrient and heavy metal storage and mobility within sediments in Kouris Reservoir, Cyprus

Role of bacteria in the production and degradation of Microcystis cyanopeptides

Contact Info

Product

Resources

About