Natural Products among Brown Algae: The Case of Cystoseira schiffneri Hamel (Sargassaceae,Phaeophyceae) |
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| Authors: | Abdelkader Ben Salem Graziano Di Giuseppe Andrea Anesi Saoussen Hammami Zine Mighri Graziano Guella |
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| Affiliation: | 1. Research Unit of Applied Chemistry and Environment (UR13ES63), Faculty of Sciences of Monastir, Avenue of the Environment, University of Monastir, Tunisia;2. Laboratory of Bioorganic Chemistry, Department of Physics, University of Trento, 38123, Povo, Trento, Italy;3. Unit of Zoology‐Anthropology, Department of Biology, University of Pisa, Pisa, Italy;4. Biophysical Institute, CNR, Povo, Trento, Italy;5. Centre for Agriculture, Food and Environment, University of Trento, via Mach 1, Trento, Italy |
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| Abstract: | A chemotaxonomic study on the marine brown alga Cystoseira schiffneri collected from the Tunisian marine coast allowed us to identify kjellmanianone ( 1 ) and a new isololiolide derivative named schiffnerilolide ( 2 ). The structure elucidation and the assignment of relative configurations of the isolated natural products were based on advanced mass spectrometric and nuclear magnetic resonance techniques. This outcome suggested a close phylogenetic relationship of C. schiffneri with brown algae belonging to genus Sargassum C. Agardh . Molecular characterization using the nuclear small subunit rRNA (SSU rRNA) gene (18S) sequence as genetic marker was made. Pigment analysis showed a significant seasonal change of carotenoids, in particular of fucoxanthin and fucoxanthinol. Also galactolipids, the main constituents of the thylakoid membranes, showed remarkable seasonal changes. |
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| Keywords: | Brown algae
Cystoseira schiffneri
Molecular characterization Phytochemical investigation Lipid analysis |
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