Dunaliella Tertiolecta
Mostrando 1-12 de 25 artigos, teses e dissertações.
-
1. Efeito do naftaleno na microalga marinha Dunaliella tertiolecta, ouriço-do-mar Lytechinus variegatus e no microcrustáceos estuarinos Nitokra sp e Leptocheirus plumulosus / Effect of naphthaleme in marine microalgae Dunaliella tertiolectea, in sea urchin Lytechinus variegatus and estuarine microstaceans Nitokra so and Leptocherius plumulosus
O naftaleno é um dos principais constituintes do petróleo solúvel em água e esta classe de poluentes está enquadrada na lista prioritária de contaminantes orgânicos persistentes. O presente trabalho traz informações sobre o efeito do naftaleno em ensaios ecotoxicológicos com quatro diferentes grupos de organismos aquáticos. Ensaios crônicos com a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/09/2012
-
2. Sensibilidade da microalga marinha Dunaliella tertiolecta BUTCHER a diferentes substâncias químicas utilizadas como referência em ensaios ecotoxicológicos / Sensitivity of the marine microalgae Dunaliella tertiolecta BUTCHER to the different chemical substances utilized as toxicity test reference
Os ensaios ecotoxicológicos com o fitoplâncton marinho têm sido uma importante ferramenta para o monitoramento da qualidade de águas devido à sua relevância ecológica. A variabilidade dos resultados dos ensaios ecotoxicológicos também pode ser atribuída à sensibilidade do lote de organismos-teste. O presente trabalho traz informações da sensibil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/10/2011
-
3. AvaliaÃÃo do efeito dos polissacarÃdeos sulfatados extraÃdos da microalga Dunaliella tertiolecta como imunoestimulante em juvenis de camarÃo Litopenaeus vannamei / Evaluation of the effect of sulfated polysaccharides extracted from the microalgae Dunaliella tertiolecta as immunostimulant in juvenile shrimp Litopenaeus vannamei
Aquaculture is one of the activities that most expands around the world and microalgae such as shrimps cultures have a great contribution into this progress. The aim of this study was the culture of the marine microlgae Dunaliella tertiolecta and extract its sulfated polysaccharides from the biomass and from the culture medium as well as to evaluate the effe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/08/2010
-
4. Ensaio cometa em microalgas marinhas: danos no DNA de Dunaliella tertiolecta Butcher 1959 causados pela exposição à 4-nitroquinolina-N-óxido e ao benzo [a] pireno / Comet assay in marine microalgae: DNA damage in Dunaliella tertiolecta Butcher 1959 caused by exposure to 4-nitroquinoline-N-oxide and benzo[a]pyrene
Dunaliella tertiolecta, uma alga verde fitoplanctônica de ampla distribuição no ambiente marinho, foi escolhida como organismo teste para estudar a possibilidade de ser utilizada no ensaio cometa, um teste de detecção de danos no DNA em células individualizadas muito utilizado na ecotoxicologia. Essas algas foram facilmente lisadas pela solução de li
Publicado em: 2007
-
5. A cDNA for Dunaliella tertiolecta cytosol ribosomal protein S11.
-
6. Uptake of HCO3− and CO2 in Cells and Chloroplasts from the Microalgae Chlamydomonas reinhardtii and Dunaliella tertiolecta1
Mass-spectrometric disequilibrium analysis was applied to investigate CO2 uptake and HCO3− transport in cells and chloroplasts of the microalgae Dunaliella tertiolecta and Chlamydomonas reinhardtii, which were grown in air enriched with 5% (v/v) CO2 (high-Ci cells) or in ambient air (low-Ci cells). High- and low-Ci cells of both species had the capacity to
American Society of Plant Physiologists.
-
7. Quantitative assay for algal chemotaxis.
A quantitative capillary assay is described for measuring chemoreception in the neritic and littoral unicellular alga Dunaliella tertiolecta. Lucite chemotaxis plates were used in the assay with 3-microliter capillaries. A Coulter Counter was employed to determine algal cell numbers. D. tertiolecta is attracted to ammonium ion with a maximum positive respons
-
8. Two Isoforms of Dihydroxyacetone Phosphate Reductase from the Chloroplasts of Dunaliella tertiolecta.
Three isoforms of dihydroxyacetone phosphate reductase in extracts from Dunaliella tertiolecta have been separated by a diethylaminoethyl cellulose column chromatography with a shallow NaCl gradient. The chloroplasts contained the two major isoforms, and the third, minor form was in the cytosol. The isoforms are unstable in the absence of glycerol and they a
-
9. Effects of Iron Limitation on Photosystem II Composition and Light Utilization in Dunaliella tertiolecta.
The effects of iron limitation on photosystem II (PSII) composition and photochemical energy conversion efficiency were studied in the unicellular chlorophyte alga Dunaliella tertiolecta. The quantum yield of photochemistry in PSII, inferred from changes in variable fluorescence normalized to the maximum fluorescence yield, was markedly lower in iron-limited
-
10. Plastid Regulation of Lhcb1 Transcription in the Chlorophyte Alga Dunaliella tertiolecta1
We identify four novel DNA-binding complexes in the nuclear-encoded Lhcb1 promoter of the chlorophyte alga Dunaliella tertiolecta that are regulated by photosynthetic pathways in the plastid. The binding activities of three of the complexes were positively correlated with time-dependent changes in Lhcb1 transcript abundance, implicating their roles as transc
American Society of Plant Biologists.
-
11. Cell Death in the Unicellular Chlorophyte Dunaliella tertiolecta. A Hypothesis on the Evolution of Apoptosis in Higher Plants and Metazoans
Apoptosis is essential for normal growth and development of multicellular organisms, including metazoans and higher plants. Although cell death processes have been reported in unicellular organisms, key elements of apoptotic pathways have not been identified. Here, we show that when placed in darkness, the unicellular chlorophyte alga Dunaliella tertiolecta
American Society of Plant Biologists.
-
12. Steady-State Growth and Chemical Composition of the Marine Chlorophyte Dunaliella tertiolecta in Nitrogen-Limited Continuous Cultures †
The marine chlorophyte Dunaliella tertiolecta was grown in continuous cultures under NH4+-N, NO2−-N, NO3−-N, and urea-N limitations. The effect of the nitrogen cell quota (Qn) on the steady-state growth rate (μ) was the same regardless of the N source. The relationship between μ and Qn was well described by the Droop equation, but only up to the true m