Effect of Selenium on the Growth of the Cyanobacterium Anacystis nidulans

Lee, L. H.; Lustigman, B.; Murray, Sean R.; Koepp, Stephen J.

doi:10.1007/s001289900916

Cited by 11 publications

(4 citation statements)

References 13 publications

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“…In the reaction of selenite ions reduction SeO 3 2ions serve as electron acceptors and it is assumed that NADH dehydrogenase or participants of electron transport chains may serve as electron donors (Ma et al 2008). Selenium is also an analogue of sulfur and may substitutes sulfur in thiols, thus altering the functions of these biomolecules (Lee et al 1999;Debieux et al 2011;Stolz et al 2002). Fig.…”

Section: Resultsmentioning

confidence: 99%

“…At the same time, an increasing recognition of its toxicity has led to the emergence of selenium as an important environmental contaminant. Industrial selenium pollution is associated directly with a broad spectrum of anthropogenic operations, which include: mining, combustion of fossil fuels, agricultural and petrochemical industries, production of pigments, pharmaceutical preparations, and glass manufacturing (Dwivedi et al 2011;Pearce et al 2009;Doran 1982;Antonioli et al 2007;Ramamurthy et al 2013;Lee et al 1999).…”

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confidence: 99%

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Selenium uptake and assessment of the biochemical changes inArthrospira(Spirulina)platensisbiomass during the synthesis of selenium nanoparticles

et al. 2017

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The process of selenium uptake by biomass of the cyanobacterium Arthrospira (Spirulina) platensis was investigated by neutron activation analysis at different selenium concentrations in solution and at different contact times. Experimental data showed good fit with the Freundlich adsorption isotherm model, with a regression coefficient value of 0.99. In terms of absorption dependence on time, the maximal selenium content was adsorbed in the first 5 min of interaction without significant further changes. It was also found that A. platensis biomass forms spherical selenium nanoparticles. Biochemical analysis was used to assess the changes in the main components of spirulina biomass (proteins, lipids, carbohydrates, and phycobilin) during nanoparticle formation.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Selenium uptake and assessment of the biochemical changes inArthrospira(Spirulina)platensisbiomass during the synthesis of selenium nanoparticles

et al. 2017

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“…Many heavy metal studies have been done using Synechococcus sp . IU 625 as a model system to study the response of organisms to heavy metal stresses (Lee et al, 1992a; Lee and Lustigman, 1996; Lee et al, 1992b; Lee et al, 1991; Lee et al, 1994; Lee et al, 1993; Lee et al, 1999; Lee et al, 2002; Lustigman et al, 2000). …”

Section: Introductionmentioning

confidence: 99%

Temperature-induced activation of freshwater Cyanophage AS-1 prophage

et al. 2011

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Synechococcus sp. IU 625 is one of the freshwater cyanobacteria responsible for harmful algal blooms (HAB). Cyanophages can serve as natural control agents and may be responsible for algal bloom prevention and disappearance. Cyanophage AS-1, which infects Synechococcus sp. IU 625 (Anacystis nidulans) and Synechococcus cedrorum, plays an important role in the environment, significantly altering the numbers of its hosts. Since seasonal (temperature-dependent) lytic induction of cyanobacterial prophage has been proposed to affect seawater algal blooms, we investigated if the AS-1 lytic cycle could be induced by a shift to high temperature. Our hypothesis was confirmed, as more phages were released at 35°C than at 24°C, with maximal induction observed with a shift from 24°C to 35°C. Furthermore, transmission electron microscopy (TEM) images provide direct evidence of lysogenic to lytic conversion with temperature shift. Thus, temperature is an important inducer for AS-1 conversion from lysogenic to lytic cycle and could have applications in terms of modulating cyanobacterial populations in freshwater aquatic environments. The study gives insight into the effect of climate change on the interaction between cyanophage and cyanobacteria in freshwater ecosystems.

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“…Blue-green algae are considered excellent microorganisms to serve as models for the investigation of environmental problems because they can serve as pollution indicators (Lee et al 1999). These microorganisms can also be used to remove toxic heavy metals like cadmium, since they are normally present in many aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Cadmium binding ability of the blue-green alga Hapalosiphon welwitschii Nägel under controlled conditions

de Guzman,

Cao

2010

SciEnggJ

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The ability of the blue-green alga Hapalosiphon welwitschii Nägel (a cyanobacterium) to bind cadmium from its medium was tested in cultures exposed to different metal concentrations (0.5, 1.5, 2.5, 3.5, 4.5, 5, 6, 8, 10 and 12 ppm). The amount of cadmium removed was shown to be time and concentration dependent. With increasing cadmium concentrations of 0.5 to 10 ppm, significant levels of the heavy metal were detected on the cell wall. However, at 12.0 ppm, a higher amount of the heavy metal was detected inside the cytoplasm. The cells also exhibited efflux of cadmium after 24 and 48 h of incubation. The presence of Cu2+ significantly increased the amount of bound cadmium. On the other hand, the ions Co2+, Mg2+, and Ni2+ significantly decreased the amount of cadmium bound to the cells most probably because of competition for binding sites resulting in inhibition of cadmium binding. The maximum binding of cadmium by the cells was at pH 9, but was not significantly T different from the binding observed in cultures grown at the optimum pH of 7.5. However, there was a significant decrease in cadmium binding when the pH of the medium was acidic (pH 3 and pH 5). The results obtained from this study may provide baseline information for further studies on the potential of the blue-green alga H. welwitschii to clean up cadmium contaminated areas.

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Effect of Selenium on the Growth of the Cyanobacterium Anacystis nidulans

Cited by 11 publications

References 13 publications

Selenium uptake and assessment of the biochemical changes inArthrospira(Spirulina)platensisbiomass during the synthesis of selenium nanoparticles

Selenium uptake and assessment of the biochemical changes inArthrospira(Spirulina)platensisbiomass during the synthesis of selenium nanoparticles

Temperature-induced activation of freshwater Cyanophage AS-1 prophage

Cadmium binding ability of the blue-green alga Hapalosiphon welwitschii Nägel under controlled conditions

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