Planktic Cyanobacteria from São Paulo State, Brazil: Chroococcales

Sant’Anna, Célia Leite; Azevedo, Maria Teresa de P.; Senna, Pedro Américo Cabral; Komárek, Jiří; Komárková, Jaroslava

doi:10.1590/s0100-84042004000200002

Cited by 52 publications

(45 citation statements)

References 13 publications

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“…Frequently associated with eutrophic water conditions (Dokulil & Teubner 2000, Huszar et al 2000, the dominance of cyanobacteria can be related to environmental factors such as high total phosphorus (Watson et al 1997), high temperature (Shapiro 1990), high pH (Caraco & Miller 1998), low light (Smith 1986) and low total nitrogen (Smith 1983). Many species are well known producers of toxic compounds (Carmichael 1996, Sant'Anna et al 2004 as well as of substances causing unpleasant taste and odor to drinking water (Persson 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Even in the state of São Paulo, southeastern Brazil, where the country's highest population densities caused severe deterioration of water quality, only few studies to describe the cyanobacterial flora of continental water bodies have been conducted. Some works which include description of planktic cyanobacteria of São Paulo are: Sant'Anna & Azevedo (1995), Azevedo et al (1996), Sant'Anna & Azevedo (2000), Komárek et al (2002), , Sant'Anna et al (2004). Concerning the upper Tietê basin, which comprises important reservoirs responsible for supplying several millions of people with drinking water, no previous work to describe the cyanobacterial flora has been published yet, although frequent cyanobacterial blooms were observed during the last decade.…”

Section: Introductionmentioning

confidence: 99%

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Planktic Cyanobacteria from upper Tietê basin reservoirs, SP, Brazil

Sant’Anna¹,

Melcher²,

Carvalho³

et al. 2007

Rev. bras. Bot.

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-(Planktic Cyanobacteria from upper Tietê basin reservoirs, SP, Brazil). Considering the great ecological and sanitary importance of the cyanobacteria and the need of detailed information about these organisms in Brazilian water bodies, the present study aims at contributing towards the knowledge of the cyanobacterial flora of five reservoirs belonging to the upper Tietê Basin, São Paulo: Billings, Guarapiranga, Jundiaí, Pirapora, Ponte Nova and Taiaçupeba. In the past several years, these reservoirs have been submitted to severe environmental deterioration and have repeatedly presented cyanobacterial blooms, including those of toxic species. The samples were collected between 1997 and 2003 either with plankton net (20 µm mesh) or van Dorn´s bottle, and preserved with lugol solution or formaldehyde. Some species were isolated and maintained in culture. Forty-eight species of cyanobacteria were identified, with predominance of the order Chroococcales (58%), followed by the orders Oscillatoriales (21%) and Nostocales (21%). Among the 48 studied species, 17 (35%) were considered potentially toxic. The occurrence and biodiversity of the cyanobacteria in each reservoir depend on the environmental conditions. Among the five water bodies, Billings Reservoir presented the most adequate situation for the development of a greater number of species (34), probably due to its high pH values (around 8). Pirapora Reservoir on the other hand, with highest conductivity (445.0 µS cm -1 ) and lowest Secchi depth values (0.2 m), presented the lowest cyanobacterial biodiversity (14 species).Key words -Brazil, diversity, planktic Cyanobacteria, reservoirs RESUMO -(Cianobactérias planctônicas em reservatórios do Alto Tietê, SP, Brasil). Diante da grande importância ecológica e sanitária das cianobactérias e da escassez de informações mais detalhadas sobre estes organismos em corpos d´água doce brasileiros, o presente trabalho pretende estudar a flora de cianobactérias em cinco represas da Bacia Hidrográfica do Alto Tietê, São Paulo. As represas Billings, Guarapiranga, Jundiaí, Pirapora, Ponte Nova e Taiaçupeba vêm sofrendo, nos últimos anos, forte deterioração ambiental e têm apresentado repetidas florações de cianobactérias, inclusive tóxicas. As amostras foram coletadas entre 1997 e 2003 com rede de plâncton (abertura da malha de 20 µm) ou garrafa do tipo van Dorn, e preservadas com lugol ou formalina. Algumas espécies foram isoladas e mantidas em cultura. Foram identificadas 48 espécies de cianobactérias, com predominância da ordem Chroococcales (58%), seguida das ordens Oscillatoriales (21%) e Nostocales (21%). Entre as 48 espécies estudadas, 17 (35%) são consideradas potencialmente tóxicas. A biodiversidade e distribuição das cianobactérias em cada reservatório relacionam-se com as condições ambientais dos mesmos. A Represa Billings mostrou-se o ambiente mais propício ao desenvolvimento de maior número de espécies (34), provavelmente em função de seu pH elevado (em torno de 8). Já o Reservatório de Pirapora, com os valor...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Planktic Cyanobacteria from upper Tietê basin reservoirs, SP, Brazil

Sant’Anna¹,

Melcher²,

Carvalho³

et al. 2007

Rev. bras. Bot.

Self Cite

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“…La principal diferencia es que el género Sphaerocavum posee división celular en dos planos y forma colonias huecas, planas o algo irregulares (Azevedo & Sant'Anna 2003), mientras que las especies de Microcystis poseen división en tres planos, colonias irregulares o de diferentes formas según la especie (Sant'Anna et al 2004). No obstante, mencionan en la descripción de M. panniformis Komárek et al que la disposición de sus células y filas cortas cerca de la superficie de colonias maduras sería producto de un tipo de división celular más simple que la de en tres planos.…”

Section: Materials Y Métodosunclassified

“…En las colonias observadas se evidenció el mucílago bien delimitado (Figs. 10 -16), lo cual es acorde a los registros para otras localidades (Komárek & Anagnostidis 1999, Sant'Anna et al 2004, McGregor 2013, Palacio et al 2015.…”

Section: Microcystis Wesenbergii (Komárek) Komárek In Kondratevaunclassified

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El género Sphaerocavum y dominancia de S. brasiliense y Microcystis wesenbergii (Microcystaceae, Cyanophyceae) en la floración algal de la laguna Huacachina, Perú

Mendoza-Carbajal

2016

Rev peru biol

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El género Sphaerocavum y dominancia de S. brasiliense y Microcystis wesenbergii(Microcystaceae, Cyanophyceae) en la floración algal de la laguna Huacachina, Perú ResumenEn el presente trabajo se registra por primera vez a las cianobacterias Sphaerocavum brasiliense Azevedo y Sant'Anna y Microcystis wesenbergii (Komárek) Komárek in Kondrateva (Microcystaceae, Cyanophyceae) en una floración algal de la laguna Huacachina (Ica), incluyendo el primer reporte del género Sphaerocavum para el Perú. Se sugiere el monitoreo de estas cianobacterias por ser formadoras de floraciones algales.Palabras clave: Cianófitas; Microcystis; floraciones algales; Desierto costero; Ica. AbstractThe present work registers for the first time the cyanobacteria Sphaerocavum brasiliense Azevedo y Sant'Anna and Microcystis wesenbergii (Komárek) Komárek in Kondrateva (Microcystaceae, Cyanophyceae) in an algal bloom on Huacachina lagoon (Ica), including the first report of Sphaerocavum for Peru. We suggest the necessity of monitoring these bloom-forming cyanobacteria.

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Biotransformations, Antioxidant System Responses, and Histopathological Indexes in the Liver of Fish Exposed to Cyanobacterial Extract

Paulino

Tavares

Terezan

et al. 2020

Enviro Toxic and Chemistry

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Radiocystis fernandoi, a microcystin (MC) producer, has been common in cyanobacterial blooms in tropical regions. Microcystin is a hepatotoxin that causes tissue damage and even death in animals, including humans; its detoxification process may involve biotransformation and activation of the antioxidant defense system. We evaluated the detoxification pathway, examined the antioxidant defense system responses, and determined the alterations and the organ histopathological indexes in the liver of the tropical fish Hoplias malabaricus after acute and subchronic intraperitoneal exposure to microcystin. The crude microcystin extract of R. fernandoi had predominantly MC‐RR and MC‐YR. The detoxification process was activated by increasing ethoxyresorufin‐O‐deethylase activity, whereas glutathione S‐transferase was inhibited. The activity of the antioxidant defense enzymes superoxide dismutase (SOD) and glutathione peroxidase decreased after acute exposure; the SOD–catalase system and the glutathione level increased after subchronic exposure. The carbonyl protein level, lipid peroxidation (LPO), and DNA damage were unchanged after acute exposure, whereas protein carbonyl was unchanged, LPO decreased, and DNA damage increased after subchronic exposure. Histopathological alteration indexes differed between acute and subchronic exposure, but the histopathological organ indexes indicate liver dysfunction in both exposure periods. We conclude that MC‐RR and MC‐YR induce different liver responses depending on the time of exposure, and the antioxidant defense responses after subchronic exposure may help to partially restore the liver function. Environ Toxicol Chem 2020;39:1041–1051. © 2020 SETAC

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Planktic Cyanobacteria from São Paulo State, Brazil: Chroococcales

Cited by 52 publications

References 13 publications

Planktic Cyanobacteria from upper Tietê basin reservoirs, SP, Brazil

Planktic Cyanobacteria from upper Tietê basin reservoirs, SP, Brazil

El género Sphaerocavum y dominancia de S. brasiliense y Microcystis wesenbergii (Microcystaceae, Cyanophyceae) en la floración algal de la laguna Huacachina, Perú

Biotransformations, Antioxidant System Responses, and Histopathological Indexes in the Liver of Fish Exposed to Cyanobacterial Extract

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