Abstract
The chemical analysis of secondary metabolites from brown algae belonging to the genus Cystoseira — collected from the French Mediterranean coast and the Atlantic coast of Morocco - has permitted us to identify the characteristic diterpenic constituents of studied species. The results were discussed and compared with those described in the literature on Sicilian species.
Initial evaluation of the results led us to propose, as a first hypothesis, the chemotaxonomic criteria which allow the species of the genus Cystoseira to be classified into three chemical groups: 1) without diterpenes, 2) with linear diterpenes and 3) with meroditerpenes (diterpenes with mixed biogenesis characterised by hydroquinonic methyl nucleus linked to a diterpenic chain). The first group corresponds to the most primitive species while the third, which can be subdivided into three other groups as a function of the structural complexity of the isolated diterpenoids (linear, cyclic or rearranged meroditerpenes), contains the most advanced ones.
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Valls, R., Piovetti, L. & Praud, A. The use of diterpenoids as chemotaxonomic markers in the genus Cystoseira . Hydrobiologia 260, 549–556 (1993). https://doi.org/10.1007/BF00049069
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DOI: https://doi.org/10.1007/BF00049069