Annual variations of the biochemical composition of Gelidium latifolium (Greville) Thuret et Bornet |
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Authors: | Mouradi-Givernaud A. Givernaud T. Morvan H. Cosson J. |
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Affiliation: | (1) Laboratoire de biochimie et biotechnologie marine, Faculté des Sciences, Kénitra, Morocco;(2) SETEXAM, Usme EL ASSAM, Route de Tanger, B.P. 210 Kénitra, Morocco;(3) Laboratoire de Biologie cellulaire végétale et de Valorisation des espèces ligneuses, Faculté des Sciences, 123 Av. A. Thomas, 87060 Limoges, France;(4) Laboratoire d'Algologie Fondamentale et Appliquée, 39 rue Desmoueux, 14000, Caen, France |
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Abstract: | 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 enable us to 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. |
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Keywords: | Gelidium agar cell wall seaweed |
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