Cyanobacteria and Cyanotoxin in the Billings Reservoir (São Paulo, SP, Brazil)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Effects of light intensity and temperature on Cylindrospermopsis raciborskii (Cyanobacteria) with straight and coiled trichomes: growth rate and morphology

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

New aerophytic morphospecies of Nostoc (Cyanobacteria) from São Paulo State, Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

New aerophytic morphospecies of Cyanobacteria from tropical forest fragments in northwestern São Paulo state, Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Cyanobacteria from coastal lagoons in southern Brazil: non-heterocytous filamentous organisms

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Biodiversidade e considerações biogeográficas das Cyanobacteria de uma área de Manguezal do Estado de Pernambuco, Brasil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Lista de Cyanobacteria do Estado de São Paulo

Com base no levantamento bibliográfico realizado sobre as cianobactérias citadas para o Brasil e para o Estado de São Paulo em particular, além de consulta à lista de espécies da flora brasileira e aos bancos de dados de coleções paulistas, encontramos um total de 460 espécies citadas para o Brasil e 378 para o estado de São Paulo. Considerando que o grupo tem ao redor de 2800 espécies, estes números representam bem menos de 20% das espécies conhecidas. Assim, frente a diversidade de ambientes e habitats existentes nos biomas tropicais/subtropicais, o reduzido número de espécies já conhecidas indica que certamente essa biodiversidade está subestimada e deve ser muito maior do que identificamos até agora.

Cyanobacteria from coastal lagoons of Southern Brazil: coccoid organisms

Considering the great ecological importance of the cyanobacteria and the need for more detailed information about these organisms in Brazilian waters, this paper provides taxonomic information about the unicellular cyanobacteria flora in lagoon systems along the coastal plains of Rio Grande do Sul State. Sampling was performed in different freshwater bodies along the eastern (Casamento Lake area) and western (near the city of Tapes) banks of the Patos Lagoon (30º40' S-30º10' S and 50º30' W-51º30' W). The samples were collected once in the rainy season and once in the dry season (from May 2003 to December 2003) using a plankton net (25 µm mesh) in pelagic and littoral zones, and by squeezing the submerged parts of aquatic macrophytes. Thirty one species belonging to the families Synechoccocaceae (7 taxa), Merismopediaceae (12 taxa), Chamaesiphonaceae (1 taxon), Microcystaceae (4) and Chroococcaceae (7 taxa) were identified. Among these species, five are reported for the first time in Rio Grande do Sul State: Chamaesiphon amethystinus (Rostafinski) Lemmermann, Chroococcus minimus (Keissler) Lemmermann, Coelomoron pusillum (Van Goor) Komárek, Coelosphaerium kuetzingeanum Naegeli, and Cyanodictyon tubiforme Cronberg.

Corticolous cyanobacteria from tropical forest remnants in northwestern São Paulo State, Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Microcystin-producing genotypes from cyanobacteria in Brazilian reservoirs

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Genetic variability of Brazilian strains of the Microcystis aeruginosa complex (Cyanobacteria/Cyanophyceae) using the phycocyanin intergenic spacer and flanking regions (cpcBA)

The genetic and morphological variability among 15 Brazilian strains of Microcystis aeruginosa (Kütz.) Kütz. collected from four locations was examined and compared with several reference strains of M. aeruginosa, M. viridis (A. Br.) Lemm. and M. wesenbergii (Kom.) Kom. in Kondr. Brazilian strains were classified by morphological features and by comparison of the nucleotide sequences of the cpcBA intergenic spacer and flanking regions. Our results indicate that Brazilian strains classified as M. aeruginosa are phylogenetically diverse compared with reference strains of M. aeruginosa and that the current taxonomy underestimates genetic diversity within M. aeruginosa. The data also demonstrate that morphological criteria alone are inadequate to characterize Microcystis species. Although colonial characters were shown to vary considerably in culture, some genetic lineages demonstrated consistent cellular diameter ranges, indicating that cell size has value as a taxonomic character. The detection of six M. aeruginosa genotypes in a single water body indicates that morphological approaches can also seriously underestimate the diversity of Microcystis bloom populations.

True branched nostocalean cyanobacteria from tropical aerophytic habitats and molecular assessment of two species from field samples

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Ecofisiologia de morfotipos reto e espiralado de Cylindrospermopsis raciborskii (Cyanobacteria) em condições controladas

Pós-graduação em Ciências Biológicas (Biologia Vegetal) - IBRC

Diversidade morfológica e estudos moleculares de espécies aerofíticas dos gêneros Brasilonema, Petalonema e Scytonema (Nostocales, Cyanobacteria)

Pós-graduação em Microbiologia - IBILCE