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Étude comparée de la composition chimique des régions souples et durcies de la cuticule de quatre espèces de siponculiens = Comparative study of the chemical composition of flexible and hard parts of the cuticle in four species of sipunculids
Voss-Foucart, M.F.; Barzin, S.; Jeuniaux, Ch. (1978). Étude comparée de la composition chimique des régions souples et durcies de la cuticule de quatre espèces de siponculiens = Comparative study of the chemical composition of flexible and hard parts of the cuticle in four species of sipunculids. Cah. Biol. Mar. 19(2): 135-145
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Voss-Foucart, M.F.
  • Barzin, S.
  • Jeuniaux, Ch.

Abstract
    A comparative study of the chemical composition of flexible and hard parts of the cuticle of Sipunculids was made on four species: Aspidosiphon clavatus Diesing, Golfingia vulgaris (de Blainville), Phascolion strombi (Montagu) and Sipunculus nudus L. The histochemistry confirmed that collagen takes part in the composition of the cuticle in all the species studied. Non protidic cuticular material consisted of neutral mucopolysaccharides, associated with acid mucopolysaccharides in the papillae of the introvert of S. nudus. Histological and histochemical differences between hard and flexible parts of the cuticle of the body of G. vulgaris were not observed. In Aspidosiphon clavatus, a peculiar protidic material, detected by amino acid chromatography after acid hydrolysis, could play a role in the hardening of the shields, this hardening being possibly increased by carbonate deposits. Using a specific enzymatic method, it was shown that chitin was lacking in the species with a locally hardened cuticle as in those with a flexible cuticle.

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