Photoinduced and Microbial Generation of Hydrogen Peroxide and Organic Peroxides in Natural Waters

Mostofa, Khan M. G.; Liu, Cong‐Qiang; Sakugawa, Hiroshi; Vione, Davide; Minakata, Daisuke; Wu, Fengchang

doi:10.1007/978-3-642-32223-5_2

Cited by 12 publications

(15 citation statements)

References 202 publications

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“…(C) Calculated photochemical production of H 2 O 2 in Lake Erie (average H 2 O 2 production across all sites for each date) calculated as described in Equation (3) using the modeled UV for the time of sample collection, the CDOM spectrum of the water sample, and a single, best fit apparent quantum spectrum ( λ ) for H 2 O 2 production. Febria et al, 2006;Mostofa et al, 2013). Although no studies have measured H 2 O 2 concentrations in freshwaters with the same degree of spatial and temporal resolution and alongside supporting chemical and biological characterization as in this study, a similar range of H 2 O 2 concentrations has been reported in a small, urban stream in New Zealand where daily measurements over one year showed H 2 O 2 concentrations ranged from ∼70 nM in winter to nearly 700 nM in summer (Rusak et al, 2005).…”

Section: Discussionsupporting

confidence: 81%

Seasonal Dynamics in Dissolved Organic Matter, Hydrogen Peroxide, and Cyanobacterial Blooms in Lake Erie

et al. 2016

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Section: Discussionsupporting

confidence: 81%

Seasonal Dynamics in Dissolved Organic Matter, Hydrogen Peroxide, and Cyanobacterial Blooms in Lake Erie

et al. 2016

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“…). The half‐life of H 2 O 2 in the live cultures and filtrate was 2.5 and 103 min, respectively – lifetimes that are lower than even the most productive coastal waters (Mostofa et al ., ). This H 2 O 2 consumption is not directly coupled to enzymatic Mn(II) oxidation by the AHP, as we have previously shown that addition of H 2 O 2 to the R. AzwK‐3b cell‐free filtrate does not increase Mn(II) oxidation (Learman et al ., ).…”

Section: Resultsmentioning

confidence: 97%

Extracellular haem peroxidases mediate Mn(II) oxidation in a marine Roseobacter bacterium via superoxide production

Andeer

Learman²,

McIlvin

et al. 2015

Environmental Microbiology

121

120

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Manganese (Mn) oxides are among the strongest sorbents and oxidants in environmental systems. A number of biotic and abiotic pathways induce the oxidation of Mn(II) to Mn oxides. Here, we use a combination of proteomic analyses and activity assays, to identify the enzyme(s) responsible for extracellular superoxide-mediated Mn oxide formation by a bacterium within the ubiquitous Roseobacter clade. We show that animal haem peroxidases (AHPs) located on the outer membrane and within the secretome are responsible for Mn(II) oxidation. These novel peroxidases have previously been implicated in direct Mn(II) oxidation by phylogenetically diverse bacteria. Yet, we show that in this Roseobacter species, AHPs mediate Mn(II) oxidation not through a direct reaction but by producing superoxide and likely also by degrading hydrogen peroxide. These findings point to a eukaryotic-like oscillatory oxidative-peroxidative enzymatic cycle by these AHPs that leads to Mn oxide formation by this organism. AHP expression appears unaffected by Mn(II), yet the large energetic investment required to produce and secrete these enzymes points to an as yet unknown physiological function. These findings are further evidence that bacterial peroxidases and secreted enzymes, in general, are unappreciated controls on the cycling of metals and reactive oxygen species (ROS), and by extension carbon, in natural systems.

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“…Although hydrogen peroxide is a strong oxidizing agent in its initial action, it is decayed to harmless water and oxygen fairly rapidly (typically within a few hours in natural waters). In nature hydrogen peroxide occurs in small concentrations in all surface waters and is produced by the biota (Mostofa et al 2013). It also occurs in rain, dew, clouds, snow, and air.…”

Section: Introductionmentioning

confidence: 99%

Elimination of cyanobacteria and microcystins in irrigation water—effects of hydrogen peroxide treatment

Spoof

Jaakkola

Važić

et al. 2020

Environ Sci Pollut Res

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Cyanobacterial blooms pose a risk to wild and domestic animals as well as humans due to the toxins they may produce. Humans may be subjected to cyanobacterial toxins through many routes, e.g., by consuming contaminated drinking water, fish, and crop plants or through recreational activities. In earlier studies, cyanobacterial cells have been shown to accumulate on leafy plants after spray irrigation with cyanobacteria-containing water, and microcystin (MC) has been detected in the plant root system after irrigation with MC-containing water. This paper reports a series of experiments where lysis of cyanobacteria in abstracted lake water was induced by the use of hydrogen peroxide and the fate of released MCs was followed. The hydrogen peroxide-treated water was then used for spray irrigation of cultivated spinach and possible toxin accumulation in the plants was monitored. The water abstracted from Lake Köyliönjärvi, SW Finland, contained fairly low concentrations of intracellular MC prior to the hydrogen peroxide treatment (0.04 μg L −1 in July to 2.4 μg L −1 in September 2014). Hydrogen peroxide at sufficient doses was able to lyse cyanobacteria efficiently but released MCs were still present even after the application of the highest hydrogen peroxide dose of 20 mg L −1. No traces of MC were detected in the spinach leaves. The viability of moving phytoplankton and zooplankton was also monitored after the application of hydrogen peroxide. Hydrogen peroxide at 10 mg L −1 or higher had a detrimental effect on the moving phytoplankton and zooplankton.

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Photoinduced and Microbial Generation of Hydrogen Peroxide and Organic Peroxides in Natural Waters

Cited by 12 publications

References 202 publications

Seasonal Dynamics in Dissolved Organic Matter, Hydrogen Peroxide, and Cyanobacterial Blooms in Lake Erie

Seasonal Dynamics in Dissolved Organic Matter, Hydrogen Peroxide, and Cyanobacterial Blooms in Lake Erie

Extracellular haem peroxidases mediate Mn(II) oxidation in a marine Roseobacter bacterium via superoxide production

Elimination of cyanobacteria and microcystins in irrigation water—effects of hydrogen peroxide treatment

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