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  • Phaeophyta  (2)
  • cell wall  (1)
  • microsphere  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Planta 162 (1984), S. 506-517 
    ISSN: 1432-2048
    Keywords: Carbohydrate antigens (alginate, fucan) ; Cell wall ; Immunofluorescence ; Fucus ; Monoclonal antibody ; Phaeophyta
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Monoclonal antibodies to cell wall carbohydrates were produced against carbohydrates extracted from the brown alga, Fucus distichus ssp. edentatus (de la Pyl.) Powell. Mouse spleen cells were immunized in vitro with alginate and fucans, and hybridoma cultures were screened by enzyme immunoassay. Most antibodies were immunoglobulin (Ig)M and one was IgA. Antigens were localized on methacrylate sections of Fucus tissues by indirect immunofluorescence. Each antibody labelled tissues with a distinctive distribution pattern in cell walls and extracellular matrix regions, demonstrating that each antibody was specific for a different extracellular epitope (i.e., antigenic determinant). Most antibodies also labelled intracellularly on at least one cell type. Punctate, fibrous or clumped labelling was characteristic of individual antibodies and provided information related to carbohydrate structure and solubility. These antibodies are molecular probes for small regions on cell wall polymers and should be valuable in studies of cell wall synthesis, secretion, assembly and modification as well as carbohydrate fine structure and function.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 260-261 (1993), S. 485-491 
    ISSN: 1573-5117
    Keywords: Adhesion ; cell wall ; embryo ; fucoid ; Fucus ; microsphere ; Phaeophyta ; zygote
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract As a first step in understanding the mechanism of algal adhesion, we describe the adhesive process during early development in Fucus gardneri zygotes. These brown algal embryos adhere to the intertidal substrate shortly after fertilization. Zygotes adhered nonspecifically to hydrophilic and hydrophobic substrates and microspheres. Initial binding of microspheres to the zygote surface coincided with initial zygote adhesion to the substrate. Binding of monodisperse dyed microspheres was used for adhesive localization and quantitation. The timing and extent of adhesive development were variable in populations of synchronously-fertilized zygotes. Small adhesive patches first appeared at 3–6 h, indicating secretion of adhesive components from cytoplasmic vesicles. The zygote hemisphere toward the substrate became sticky by 7–8 h. The entire surface was sticky after rhizoid germination at 12 h. Localization of adhesive at both the outer wall surface and along strands attached to the wall implicates cell wall polymers as a glue component. Loss of microspheres from the rhizoid surface in high salt or chelators indicates that initial adhesive attachment to the wall is noncovalent. Formation of adhesive aggregates in medium showed that the mechanism of adhesive formation includes two separable processes, secretion of adhesive components and extracellular interactions between adhesive components and the wall.
    Type of Medium: Electronic Resource
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