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Floridean starch and carrageenan contents as responses of the red alga Solieria chordalis to culture conditions

Published online by Cambridge University Press:  01 May 1999

ISABELLE FOURNET ,
MUSTAPHA ZINOUN ,
ERIC DESLANDES ,
MARCEL DIOURIS  and
JEAN YVES FLOC'H
ISABELLE FOURNET
Affiliation:
Laboratoire d'Ecophysiologie et Biochimie des Algues Marines, Institut Universitaire Européen de la Mer, UBO, Place Nicolas Copernic, Technopôle Brest-Iroise, 29380 Plouzané, France
MUSTAPHA ZINOUN
Affiliation:
Laboratoire d'Ecophysiologie et Biochimie des Algues Marines, Institut Universitaire Européen de la Mer, UBO, Place Nicolas Copernic, Technopôle Brest-Iroise, 29380 Plouzané, France
ERIC DESLANDES
Affiliation:
Laboratoire d'Ecophysiologie et Biochimie des Algues Marines, Institut Universitaire Européen de la Mer, UBO, Place Nicolas Copernic, Technopôle Brest-Iroise, 29380 Plouzané, France
MARCEL DIOURIS
Affiliation:
Laboratoire d'Ecophysiologie et Biochimie des Algues Marines, Institut Universitaire Européen de la Mer, UBO, Place Nicolas Copernic, Technopôle Brest-Iroise, 29380 Plouzané, France
JEAN YVES FLOC'H
Affiliation:
Laboratoire d'Ecophysiologie et Biochimie des Algues Marines, Institut Universitaire Européen de la Mer, UBO, Place Nicolas Copernic, Technopôle Brest-Iroise, 29380 Plouzané, France
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Abstract

The influence of culture conditions on the biosynthesis and degradation of polysaccharides (starch and carrageenan) in the red alga Solieria chordalis was investigated. Following 1 week of incubation in the dark, the alga synthesized floridean starch at two irradiances, 50 and 480 μmol photons m−2 s−1 (400–700 nm), in nutrient-unenriched seawater. Upon transfer of these cultured algae to nutrient-enriched seawater at 50 μmol photons m−2 s−1, the stored floridean starch was found to break down. 14C labelling revealed that during floridean starch breakdown the tracer was transferred to carrageenan. These results are interpreted as carbon transfer from stored floridean starch for use in carrageenan biosynthesis.

Keywords

biosynthesiscarrageenan14C labellingfloridean starchRhodophyceaeSolieria chordalis
Type
Research Article
Information
European Journal of Phycology , Volume 34 , Issue 2 , May 1999 , pp. 125 - 130
Copyright
© 1999 British Phycological Society

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