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Natural Products among Brown Algae: The Case of Cystoseira schiffneri Hamel (Sargassaceae, Phaeophyceae)
Author(s) -
Salem Abdelkader Ben,
Di Giuseppe Graziano,
Anesi Andrea,
Hammami Saoussen,
Mighri Zine,
Guella Graziano
Publication year - 2017
Publication title -
chemistry and biodiversity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.427
H-Index - 70
eISSN - 1612-1880
pISSN - 1612-1872
DOI - 10.1002/cbdv.201600333
Subject(s) - brown algae , fucoxanthin , algae , botany , sporophyte , phylogenetic tree , brown seaweed , biology , gene , biochemistry
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.