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| Registros recuperados: 73 | |
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| ORTIZ-MORENO,Martha Lucía; SOLARTE-MURlLLO,Laura Vanessa; SANDOVAL-PARRA,Karen Ximena. |
| ABSTRACT Chlorophyta and Cyanophyta are photosynthetic organisms characterized by their biochemical plasticity, which has allowed them to develop in different environments and have a faster growth rate than plants. Depending on the species and environmental conditions, these organisms can produce nitrogenous enzymes, for atmospheric nitrogen fixation; phosphatases, that solubilize phosphorus; phytohormones, that promote plant growth; and hygroscopic polysaccharides, that prevent erosion and improve soil characteristics. In this sense, the aim of this review was to analyze the available information on the use of Chlorophyta and Cyanophyta as biofertilizers and their potential application in organic food production. Multiple studies and researches were found... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofertilizers; Cyanobacteria; Green algae; Organic agriculture. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000200303 |
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| Branco,Luis Henrique Zanini; Moura,Ariadne do Nascimento; Silva,Adriana Cristina da; Bittencourt-Oliveira,Maria do Carmo. |
| Manguezais caracterizam-se por apresentarem amplas variações ambientais (principalmente de salinidade, irradiância e teor de oxigênio) e possuírem substrato relativamente instável, o que exige adaptações específicas dos organismos para habitar com sucesso este ambiente. O presente estudo procura, principalmente, contribuir com o conhecimento da biodiversidade, através da realização do levantamento da flora de cianobactérias habitantes de Manguezais do Estado de Pernambuco. Foram realizadas amostragens quinzenais em quatro pontos distintos do Manguezal do rio Paripe, entre agosto e dezembro/1998, totalizando 27 amostras coletadas. A identificação das principais cianobactérias componentes das comunidades revelou a presença de 16 espécies, distribuídas em 11... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyanobacteria; Mangue; Levantamento taxonômico; Biogeografia; Pernambuco. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062003000400010 |
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| Ruckert, Gabriela Von; CETEC; Campos, Mônica de Cassia Souza; CETEC; Rolla, Maria Edith; CETEC. |
| Limnoperna fortunei é uma espécie invasora na América do Sul que, devido ao seu crescimento excessivo, tornou-se um sério problema para o ambiente e para os setores usuários de água bruta. L. fortunei é um molusco filtrador que se alimenta de fitoplâncton e outras partículas suspensas. Moluscos filtradores são grandes bioacumuladores de toxinas. Desta forma, L. fortunei apresenta um potencial de bioacumulação e transferência na cadeia trófica de cianotoxinas. Neste estudo, experimentos in vitro demonstraram que L. fortunei é capaz de alimentar-se de espécies de Cyanobacteria potencialmente tóxicas, Microcystis viridis e Pseudanabaena sp. As taxas de filtração foram 17,20 e 24,52mL.mgPS-1.h-1, respectivamente, sendo similares à encontrada para a Chlorophyta... |
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Palavras-chave: 2.01.00.00-0 Biologia Geral Limnoperna fortunei; Espécie invasora; Taxa de filtração; Cyanobacteria; Microcystis; Pseudanabena; Selenastrum 2.01.00.00-0 Biologia Geral. |
| Ano: 2004 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1523 |
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| Echenique,Ricardo; Giannuzzi,Leda; Ferrari,Luis. |
| In April 2000, alterations in drinking water quality, such as turbidity and odors similar to those of organochloride pesticides, were detected at Bahía Blanca (Argentina). This fact was associated to reports of dermic reactions and respiratory problems in the population. Samples drawn from Paso de las Piedras reservoir, two water treatment plants of at inlet and outlet points and at several particular houses were analyzed. Total phytoplankton in the reservoir varied between 49440 and 84832 cells.ml-1, while dominant species was, Anabaena circinalis. Efficiency to remove microorganisms (ER) by the treatment plants considering cell number of total phytoplankton was analyzed. Bacteriological analysis, qualitative and quantitative studies of phytoplankton,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyanobacteria; Phytoplankton; Blooms; Biogenic odour compounds. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-37432006000200001 |
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| Lira,Giulliari A. S. T.; Araújo,Elcida L.; Bittencourt-Oliveira,Maria Do Carmo; Moura,Ariadne N.. |
| The present study reports the phytoplankton abundance, dominance and co-existence relationships in the eutrophic Carpina reservoir, Pernambuco, Brazil. Sampling was carried out at six different depths bimonthly at a single reservoir spanning two climatic periods: dry season (January, September, and November 2006) and rainy season (March, May, and July 2006). Density, abundance, dominance, specific diversity and equitability of the community were determined, along with chlorophyll a, and physical and chemical variables of the environment. Eight species were considered abundant, and their densities corresponded to more than 90% of the total phytoplankton community quantified. Cyanobacteria represented more than 80% of this density. Cylindrospermopsis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carpina reservoir; Cylindrospermopsis raciborskii; Cyanobacteria; Limnological characteristics; Phytoplankton structure; Vertical distribution. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400018 |
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| OLIVEIRA,FÁBIO H.P.C. DE; ARA,ANDRÉ L.S. CAPELA E; MOREIRA,CESAR H.P.; LIRA,OSMAN O.; PADILHA,MARIA DO ROSÁRIO F.; SHINOHARA,NEIDE K.S.. |
| This study investigated the water quality in an urban eutrophic reservoir in Northeastern Brazil, considering the influence of seasonality. Monthly, samples were collected in the sub-surface reservoir. The following abiotic variables were analyzed: temperature, pH, dissolved oxygen, apparent color, turbidity, conductivity, fluoride, total nitrogen, chlorides, total dissolved solids, total hardness, iron, copper, manganese, aluminum, chlorophyll-a and phaeophytin. Total and thermotolerant coliforms were analyzed according to APHA (2012). Cyanobacteria density was quantified through its biomass. The data were analyzed using one- way ANOVA and Pearson correlation test. Higher values mean phytoplankton biomass (26.3mm3.L–1) occurred in the dry season,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coliforms; Cyanobacteria; Reservoir; Trophic state. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000401863 |
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| Almeida,Teodoro I. R; Calijuri,Maria do Carmo; Falco,Patrícia B; Casali,Simone P; Kupriyanova,Elena; Paranhos Filho,Antonio C; Sigolo,Joel B; Bertolo,Reginaldo A. |
| The Pantanal of Nhecolândia, the world's largest and most diversified field of tropical lakes, comprises approximately 10,000 lakes, which cover an area of 24,000 km² and vary greatly in salinity, pH, alkalinity, colour, physiography and biological activity. The hyposaline lakes have variable pHs, low alkalinity, macrophytes and low phytoplankton densities. The saline lakes have pHs above 9 or 10, high alkalinity, a high density of phytoplankton and sand beaches. The cause of the diversity of these lakes has been an open question, which we have addressed in our research. Here we propose a hybrid process, both geochemical and biological, as the main cause, including (1) a climate with an important water deficit and poverty in Ca2+ in both superficial and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pantanal; Alkaline lakes; Saline lakes; Cyanobacteria; Alkalinization processes. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000200004 |
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| Stucken,Karina; Koch,Robin; Dagan,Tal. |
| Cyanobacteria display a large diversity of cellular forms ranging from unicellular to complex multicellular filaments or aggregates. Species in the group present a wide range of metabolic characteristics including the fixation of atmospheric nitrogen, resistance to extreme environments, production of hydrogen, secondary metabolites and exopolysaccharides. These characteristics led to the growing interest in cyanobacteria across the fields of ecology, evolution, cell biology and biotechnology. The number of available cyanobacterial genome sequences has increased considerably in recent years, with more than 140 fully sequenced genomes to date. Genetic engineering of cyanobacteria is widely applied to the model unicellular strains Synechocystis sp. PCC 6803... |
| Tipo: Journal article |
Palavras-chave: Cyanobacteria; Genetic engineering; Defense mechanism; Restriction-modification. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000400009 |
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| MORENO,ISABEL M; PEREIRA,PAULO; FRANCA,SUSANA; CAMEÁN,ANA. |
| This paper describes the occurrence of toxic cyanobacteria along the Guadiana River over its course between Mérida and Badajoz (Extremadura, Spain). Water sampling for phytoplankton quantification and toxin analysis was carried out regularly between 1999 and 2001 in six different locations, including two shallow, slow-flowing river sites, two streamed river sites and two drinking water reservoirs. The cyanobacterial community differed significantly between these locations, especially during the summer. The predominant genera were Microcystis, Oscillatoria, Aphanizomenon and Anabaena. Using an ELISA assay the total microcystin contents of natural water samples from the most eutrophic locations ranged from 0.10 _ 21.86 mg mcyst-LR equivalent·L-1 in... |
| Tipo: Journal article |
Palavras-chave: Cyanobacteria; Microcystins; Guadiana; Spain. |
| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000300006 |
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| Villac,Maria Célia; Tenenbaum,Denise Rivera. |
| This is a historical account of the biodiversity of phytoplankton in Guanabara Bay, Brazil. It is based on 57 publications that refer to sampling carried out between 1913 and 2004. The publications included are those with direct microscopic identification. Although 80% of the studies focus on ecological issues that tend to mention only the most abundant species, 24 publications provide comprehensive check-lists at the species level, especially of taxa > 20 μm. The inventory of species includes, to date, 308 taxa among 199 diatoms, 90 dinoflagellates, 9 cyanobacteria, 5 euglenophyceans, 1 chlorophycean, 1 prasinophycean, 1 silicoflagellate, and 2 ebriids. The most conspicuous species were the dinoflagellate Scrippsiella trochoidea and diatoms from the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Marine microalgae; Diatoms; Dinoflagellates; Cyanobacteria; Algal blooms. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000200030 |
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| Registros recuperados: 73 | |
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