Green algal extracellular products regulate antialgal toxin production in a cyanobacterium

Kearns, Katherine; Hunter, Mark D.

doi:10.1046/j.1462-2920.2000.00104.x

Cited by 107 publications

(65 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The maximum effect (12.01%) was observed when algal suspensions were exposed to the sample collected at t f , but even lower inhibitory effects were detected in t 0 and 2t f (10.9 and 8.3 % of inhibition respectively), with significant differences of the treated samples to the control. A similar effect was reported on green algae exposure to anatoxin [65], a neurotoxin structurally similar to benzoylecgonine [66].…”

Section: Ecotoxicity and Genotoxicity Of Treated Watersupporting

confidence: 77%

Removal of benzoylecgonine from water matrices through UV254/H2O2 process: Reaction kinetic modeling, ecotoxicity and genotoxicity assessment

Spasiano

Russo

Vaccaro

et al. 2016

Journal of Hazardous Materials

View full text Add to dashboard Cite

Section: Ecotoxicity and Genotoxicity Of Treated Watersupporting

confidence: 77%

Removal of benzoylecgonine from water matrices through UV254/H2O2 process: Reaction kinetic modeling, ecotoxicity and genotoxicity assessment

Spasiano

Russo

Vaccaro

et al. 2016

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…These properties prevent grazing by zooplankton (Webster & Peters, 1978), and interfere in the development of other algae (Kearns & Hunter, 2000). Both species, Cylindrospermopsis raciborskii and Microcystis aeruginosa, can produce toxins (Starkweather & Kellar, 1987).…”

Section: Discussionmentioning

confidence: 99%

Effects of algicide (Copper Sulfate) application on short-term fluctuations of phytoplankton in Lake Paranoá, Central Brazil

Padovesi-Fonseca

Philomeno

2004

Braz. J. Biol.

View full text Add to dashboard Cite

Short-term fluctuations and structure of phytoplankton were examined for two months in the dry season (August-September/1997) in a eutrophic reservoir of central Brazil. Algicide treatment for the control of Microcystis aeruginosa bloom influenced the short-term variation pattern of the phytoplankton community. Algicide treatment was effective in controlling M. aeruginosa bloom, but it also influenced the Cylindrospermopsis raciborskii population. These species retained low densities, showing small colonies and trichomes, respectively. Drops in Cyanobacteria populations following algicide treatment were succeeded by progressive increase in Chlorophyta. The shifts in environmental conditions may have allowed the development of this group. In this study correspondence analysis of abundance data for phytoplankton assemblage in lake Paranoá revealed that available light, rather than chlorophyll-a, total suspended material, and water temperature, accounted for most of the short-term fluctuation in phytoplankton structure during algicide application. Canonical correspondance analysis (CCA) showed the primary importance of water transparency changes in abundance of taxa in the community. Algicide treatment for the control of nuisance blooms is discussed as a contribution to improved efficiency in reservoir management.Key words: Cyanobacteria, Chlorophyta, reservoir, Brazil. RESUMO Efeitos da aplicação de algicida (sulfato de cobre) sobre flutuações de curta duração do fitoplâncton no lago Paranoá, Brasil centralFlutuações de curta duração e a estrutura do fitoplâncton foram analisadas ao longo de dois meses na estação seca (agosto-setembro de 1997) em reservatório eutrófico do Brasil central. A aplicação de algicida para o controle de florescimentos de Microcystis aeruginosa exerceu influência sobre a variação temporal da comunidade fitoplanctônica, sendo efetiva também no controle do florescimento de M. aeruginosa e sobre a população de Cylindrospermopsis raciborskii. Ambas permaneceram em baixas densidades numéricas, com pequenas colônias e tricomas, respectivamente. Quedas bruscas de populações de Cyanobacteria após o tratamento de algicida foram seguidas por progressivo aumento de Chlorophyta. Mudanças de condições ambientais podem ter permitido o desenvolvimento deste último grupo. Análise de correspondência de dados de abundância do fitoplâncton no lago Paranoá revelou que a variável luz disponível se relacionou mais à flutuação de curta duração em estrutura do fitoplâncton do que a clorofila-a, o material suspenso total e a temperatura da água. A ACC constatou que as mudanças de transparência de água foram de primordial importância na abundância dos taxa fitoplanctônicos. O tratamento de algicida no controle de florescimentos algais é discutido aqui em relação ao gerenciamento eficiente de reservatórios.Palavras-chave: Cyanobacteria, Chlorophyta, reservatório, Brasil.

show abstract

“…Recently, anatoxin and microcystin LR from Anabaenaflos-aquae were reported to be involved in chemical signaling between competing phytoplankton organisms, that is, A. flos-aquae and Chlamydomonas reinhardtii, a flagellated unicellular chlorophyte (Kearns and Hunter, 2000;Keams and Hunter, 2001). Extracellular products of A .…”

Section: Cyanobacteriamentioning

confidence: 99%

Allelopathy of Aquatic Autotrophs

Gross¹

2003

Critical Reviews in Plant Sciences

542

355

View full text Add to dashboard Cite

Allelopathy in aquatic environments may provide a competitive advantage to angiosperms, algae, or cyanobacteria in their interaction with other primary producers. Allelopathy can influence the competition between different photoautotrophs for resources and change the succession of species, for exarnple, in phytoplankton cornmunities. Field evidence and laboratory studies indicate that allelopathy occurs in all aquatic habitats (marine and freshwater), and that ail prirnary producing organisms (cyanobacteria, micro-and macroalgae as well as angiospenns) are capable of producing and releasing allelopathically active compounds. Although allelopathy also includes positive (stimulating) interactions, the majority of studies describe the inhibitory activity of ailelopathicaily active compounds. Different mechanisms operate depending on whether allelopathy takes place in the Open water (pelagic zone) or is Substrate associated (benthic habitats). Allelopathical interactions are especiaily common in fully aquatic species, such as submersed macrophytes or benthic algae and cyanobacteria. The prevention of shading by epiphytic and planktonic primary producers and the competition for space may be the ultimate cause for allelopathical interactions. Aquatic ailelochemicals often target multiple physiological processes. The inhibition of photosynthesis of competing primary producers seems tobe a frequent mode of action. Multiple biotic and abiotic factors determine the strength of allelopathic interactions. Bacteria associated with the donor or target organism can metabolize excreted aiielochemicals. Frequently, the impact of surplus or limiting nutrients has been shown to affect the overail production of allelochemicals and their effect on target species. Similarities and differences of ailelopathic interactions in marine and freshwater habitats as well as between the different types of producing organisms are discussed.

show abstract

Green algal extracellular products regulate antialgal toxin production in a cyanobacterium

Cited by 107 publications

References 43 publications

Removal of benzoylecgonine from water matrices through UV254/H2O2 process: Reaction kinetic modeling, ecotoxicity and genotoxicity assessment

Removal of benzoylecgonine from water matrices through UV254/H2O2 process: Reaction kinetic modeling, ecotoxicity and genotoxicity assessment

Effects of algicide (Copper Sulfate) application on short-term fluctuations of phytoplankton in Lake Paranoá, Central Brazil

Allelopathy of Aquatic Autotrophs

Contact Info

Product

Resources

About