Toxic potential of the raphidophyte Olisthodiscus luteus: mediation by reactive oxygen species

Kim, Daekyung; Nakamura, Atsushi; Okamoto, Tarou; Komatsu, Nobukazu; Oda, Tatsuya; Ishimatsu, Atsushi; Muramatsu, Tsuyoshi

doi:10.1093/plankt/21.6.1017

Cited by 29 publications

(18 citation statements)

References 40 publications

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“…Reports of HAB species that produce significant levels of ROS include H. akashiwo (Twiner and Trick 2000), Chattonella spp. (Tanaka et al 1992), Olisthodiscus luteus (Kim et al 1999b), as well as the coccolithophorid Hymenomonas carterae (Palenik et al 1987) and the dinoflagellate Cochlodinium polykrikoides (Kim et al 1999a). In this study, we have shown that four geographically distinct H. akashiwo isolates have different levels of H 2 O 2 production.…”

Section: Discussionmentioning

confidence: 59%

Toxic effects of Heterosigma akashiwo do not appear to be mediated by hydrogen peroxide

Twiner

Dixon

Trick

2001

Limnology & Oceanography

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The ichthyotoxic red tide organism Heterosigma akashiwo (Raphidophyceae) has been associated with fish kill events within the aquaculture industry for many years. The precise toxicological mechanism involved in these fish kills is unclear; however, much research attention has focused on the production of reactive oxygen species (ROS) by these toxic algae. In this study, we investigated the production of hydrogen peroxide (

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Section: Discussionmentioning

confidence: 59%

Toxic effects of Heterosigma akashiwo do not appear to be mediated by hydrogen peroxide

Twiner

Dixon

Trick

2001

Limnology & Oceanography

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“…Ichthytoxicity induced by C. marina seems to be the result of a combined effect of PUFAs and superoxide caused by exponentially growing algae especially at densities below 1 · 10 À4 cells per ml À1 (Marshall et al, 2005b). Remarkably, the inhibiton of V. alginolyticus growth by C. marina and Olisthodiscus luteus is also highest at low cell densities (Oda et al, 1992(Oda et al, , 1997Kim et al, 1999).…”

Section: Discussionmentioning

confidence: 98%

Evidence for inhibition of bacterial luminescence by allelochemicals from Fibrocapsa japonica (Raphidophyceae), and the role of light and microalgal growth rate

et al. 2007

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The marine microalga Fibrocapsa japonica Toriumi and Takano (Raphidophyceae) produces haemolysins, neurotoxins and reactive oxygen species (ROS). To quantify potential effects of such bioactive compounds on surrounding organisms the marine bacterium Vibrio fischeri was exposed to F. japonica culture samples. Inhibition of V. fischeri 's natural luminescence, indicative of impaired metabolism, was related to the number of F. japonica cells added. The effect was fast, within 15 min. It was caused by one, possibly several, excreted substances that were less active after heating. Freezing of culture supernatant partly inactivated these substances, but ROS-scavenging enzymes had no effect. Light enhanced the V. fischeri luminescence inhibition in two ways. The direct effect of light on the action of F. japonica luminescence inhibiter(s) could be described by a saturation curve with maximum effect above 20 mmol photons m À2 s À1 . Light also had an indirect effect: biomass production, dependent on light availability, was closely related to the amount of inhibiting compound(s) produced by the alga. Algal growth rate, rather than its cell density, determined the bacterial luminescence inhibition per F. japonica cell, resulting in a 5-fold stronger inhibition at maximum growth rates compared to cells that barely grew during the stationary growth phase. The bioassay with F. japonica and V. fischeri has allowed quantification of the negative effects on bacteria in the microalgal microenvironment. The results presented here suggest that at favourable growth conditions F. japonica releases bioactive compounds that improve its competitive abilities.

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“…All raphidophytes are known to produce ROS (Tanaka et al, , 1994Tanaka & Muto, 1992;Shimada et al, 1993;Oda et al, 1992aOda et al, , 1992bOda et al, , 1994Oda et al, , 1995Oda et al, , 1997Kim et al, 1999b), including superoxide (O 2 .-), hydrogen peroxide (H 2 O 2 ) and hydroxyl radicals (OH . ).…”

Section: Introductionmentioning

confidence: 99%

Antioxidant responses and lipid peroxidation in gills and erythrocytes of fish (Rhabdosarga sarba) upon exposure to Chattonella marina and hydrogen peroxide: Implications on the cause of fish kills

Woo

Liu

et al. 2006

Journal of Experimental Marine Biology and Ecology

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Chattonella marina, a red tide or harmful algal bloom species, has caused mass fish kills and serious economic loss worldwide, and yet its toxic actions remain highly controversial. Previous studies have shown that this species is able to produce reactive oxygen species (ROS), and therefore postulated that ROS are the causative agents of fish kills. The present study investigates antioxidant responses and lipid peroxidation in gills and erythrocytes of fish (Rhabdosarga sarba) upon exposure to C. marina, compared with responses exposed to equivalent and higher levels of ROS exposure.Even though C. marina can produce a high level of ROS, gills and erythrocytes of sea bream exposed to C. marina for 1 to 6 h showed neither significant induction of antioxidant enzymes nor lipid peroxidation. Antioxidant responses and oxidative damage did not occur as fish mortality began to occur, yet could be induced upon exposure to artificially supplied ROS levels an order of magnitude higher. The result of this study implies that ROS produced by C. marina is not the principal cause of fish kills.

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Toxic potential of the raphidophyte Olisthodiscus luteus: mediation by reactive oxygen species

Cited by 29 publications

References 40 publications

Toxic effects of Heterosigma akashiwo do not appear to be mediated by hydrogen peroxide

Toxic effects of Heterosigma akashiwo do not appear to be mediated by hydrogen peroxide

Evidence for inhibition of bacterial luminescence by allelochemicals from Fibrocapsa japonica (Raphidophyceae), and the role of light and microalgal growth rate

Antioxidant responses and lipid peroxidation in gills and erythrocytes of fish (Rhabdosarga sarba) upon exposure to Chattonella marina and hydrogen peroxide: Implications on the cause of fish kills

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