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  • Key words: Octocoral, diterpene, antifouling, furan, lactone, barnacles, cypris settlement  (1)
  • peptides  (1)
  • 1
    ISSN: 1436-2236
    Keywords: Key words: Octocoral, diterpene, antifouling, furan, lactone, barnacles, cypris settlement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract: Prevoius studies have determined that the octocorals Renilla reniformis and Leptogorgia virgulata contain diterpenes that are potent inhibitors of barnacle settlement. These antifoulants—the renillafoulins and pukalide—are, however, comparatively complex and thus are not amenable to commercial exploitation. The present study examined 19 analogues, based on the functional groups of lactone and furan rings in the parent molecules, for antisettlement activity and toxicity. The latter parameters are presented as EC50 values for inhibition of cypris settlement and naupliar swimming, respectively. Assays of a subset of the analogues indicated that they were active in solution rather than when bound to a surface and that at relatively high concentrations they had a narcotic action. The mechanism whereby some of the analogues were able to inhibit settlement at nontoxic concentrations has yet to be explained but suggests that there is merit in the present approach to antifoulant development.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical ecology 12 (1986), S. 1013-1023 
    ISSN: 1573-1561
    Keywords: Marine animals ; macromolecules ; peptides ; glycoproteins ; behavior ; prey detection ; site selection ; metamorphosis ; biopolymers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A review of the roles of biopolymers as marine chemical cues is presented. The goal of the review is to provide a context within which to view present research and to provide insight into future research potential for macromolecules in marine chemical ecology. The roles of peptides, proteins, glycoproteins, proteoglycans, lectins, and mucopolysaccharides are discussed. Biological events mediated include: larval settlement and metamorphosis, gamete attraction, predator-prey interactions, alarm responses, feeding responses, nonfood resource acquisition, trail following, and larval-release behavior. Molecular origins, transmission, modulation, and multifunctionality of cues are discussed and illustrated with specific examples. The advantages of biopolymers, especially peptides and proteins, as specific cues in marine systems derive from their solubility, specific information content (due to the asymmetric nature of the monomer and the wordlike information content of the primary structure of the polymer), distance transmission in water by bulk flow rather than diffusion, relatively high signal-to-noise ratio, and common occurrence as structural and metabolic components of all living organisms.
    Type of Medium: Electronic Resource
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