Annual variations of the biochemical composition of Gelidium latifolium (Greville) Thuret et Bornet

Agar, floridean starch, protein, ash and water content in Gelidium latifolium from nature were followed monthly over one year. Comparison of variations in these contents, algal growth and cytological observations establish a cycle for agar synthesis. In autumn, after reproduction of alga, there is a...

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Bibliographic Details
Published in:Hydrobiologia 1993-01, Vol.260-261 (1), p.607-612
Main Authors: Mouradi-Givernaud, A., Givernaud, T., Morvan, H., Cosson, J.
Format: Article
Language:English
Subjects:
Gelidium latifolium
Marine
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Summary:Agar, floridean starch, protein, ash and water content in Gelidium latifolium from nature were followed monthly over one year. Comparison of variations in these contents, algal growth and cytological observations establish a cycle for agar synthesis. In autumn, after reproduction of alga, there is an active algal growth period with agar synthesis and utilization of floridean starch. In winter, synthesis is shifted toward protein accumulation while there is a partial agar hydrolysis. In spring another active growth period of the alga occurs with accumulation of floridean starch and synthesis of agar. In summer and during reproduction, there is a depletion of thalli nitrogen content while the agar synthesis pauses.
ISSN:0018-8158
1573-5117
DOI:10.1007/BF00049078