Spirogyra
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Detection, purification and characterization of a lectin from freshwater green algae Spirogyra spp.
ABSTRACT Freshwater algae are rich sources of structurally biologically active metabolites, such as fatty acids, steroids, carotenoids and polysaccharides. Among these metabolites, lectins stand out. Lectins are proteins or glycoproteins of non-immune origin which bind to carbohydrates or glycoconjugates, without changing ligand structure. Many studies have
An. Acad. Bras. Ciênc.. Publicado em: 31/08/2017
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2. First records of Zygnematales (Zygnematophyceae, Streptophyta) for the state of Bahia, Brazil
This study presents the first taxonomic inventory of the order Zygnematales in the Litoral Norte Environmentally Protected Area, in the state of Bahia, Brazil. Fifty samples of planktonic and periphytic material were collected, from lotic and lentic environments, during the summer (January-March) and winter (June-August) of 2009. We identified 18 taxa distri
Acta Bot. Bras.. Publicado em: 2013-12
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3. Macroalgas em nascentes e arredores de riachos na região noroeste do estado de São Paulo
Macroalgas são organismos tipicamente bentônicos, constituídos por um talo maduro, discreto e reconhecível a olho nu, cuja identificação microscópica é necessária. Diversos estudos foram realizados visando o conhecimento taxonômico em riachos brasileiros, no entanto, são raros os trabalhos que abordam as algas que se desenvolvem nas nascentes dest
Hoehnea. Publicado em: 2010-09
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4. Distribuição espacial de palinomorfos na superfície dos sedimentos de fundo da Lagoa do Campelo, região Norte do Estado do Rio de Janeiro, Brasil
Quatro amostras do sedimento superficial de fundo da Lagoa do Campelo foram coletadas em uma transecção de 500 m por 500 m de uma borda a outra, na direção nordeste/sudoeste, direção dominante dos ventos na região. A análise dos grãos de pólen, esporos de Pteridophyta e algas foi usada para a avaliação da variação espacial de deposição de pal
Acta Botanica Brasilica. Publicado em: 2005-12
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5. Aspectos da biologia de Buenoa platycnemis (Fieber) (Insecta, Heteroptera, Notonectidae) da Restinga de Maricá, Rio de Janeiro
A monthly quantitative study on B. platycnemis (Fieber, 1851) was carried out in a sand dune marsh, on the littoral of Rio Janeiro State. The aims of this study were to correlate the life cycle of the species with the seasonal regime of the water body, defining steps of the annual cycle, age strueture, and to indicate oviposition sites and trophic relations.
Revista Brasileira de Zoologia. Publicado em: 2000-03
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6. Light-induced Adhesion of Spirogyra Cells to Glass 1
Adhesion of Spirogyra (tentatively, Spirogyra fluviatilis) cells to glass is described. The cells of an algal filament can adhere to a substrate only when they are located at the end of the filament. Rapid adhesion is induced by blue-violet light (blue adhesion) as well as by temperature shift (about 6 C → about 22 C) or shaking (dark adhesion). Adherent c
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7. Microbodies from Spirogyra: Organelles of a Filamentous Alga Similar to Leaf Peroxisomes 12
Organelles from Spirogyra cells were separated on a linear sucrose gradient. After centrifugation, most of the protein was found in the top fraction. Two minor protein peaks at density (g/cm3) 1.17 and 1.21 were due to chloroplast particles and mitochondria, respectively. Although there was an extremely low concentration of protein at density 1.25 g/cm3, a m
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8. TIME FACTOR CONCERNED WITH FLUIDITY CHANGES IN WARMED AND COOLED CELLS OF ZYGNEMA AND SPIROGYRA1
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9. Rhizoid Differentiation in Spirogyra: III. Intracellular Localization of Phytochrome
Localization of phytochrome which mediates rhizoid differentiation in Spirogyra was investigated. The red-absorbing form of phytochrome (Pr) seems to be distributed all over the cell periphery which remained in the centripetal end part after the centrifugation, as rhizoids formed equally well with red spotlight irradiation of three different parts of an end
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10. Evolution of green plants as deduced from 5S rRNA sequences
We have constructed a phylogenic tree for green plants by comparing 5S rRNA sequences. The tree suggests that the emergence of most of the uni- and multicellular green algae such as Chlamydomonas, Spirogyra, Ulva, and Chlorella occurred in the early stage of green plant evolution. The branching point of Nitella is a little earlier than that of land plants an