Prevalence and mechanism of polyunsaturated aldehydes production in the green tide forming macroalgal genus Ulva (Ulvales, Chlorophyta)
作者： Taghreed Alsufyani , Aschwin H. Engelen , Onno E. Diekmann , Stefan Kuegler , Thomas Wichard
DOI: 10.1016/J.CHEMPHYSLIP.2014.05.008
关键词: Eicosapentaenoic acid 、 Stearidonic acid 、 Arachidonic acid 、 Beta oxidation 、 Chemistry 、 Fatty acid 、 Oxylipin 、 Polyunsaturated fatty acid 、 Lipoxygenase 、 Biochemistry
摘要: Lipoxygenase/hydroperoxide lyase mediated transformations convert polyunsaturated fatty acids into various oxylipins. First, lipoxygenases catalyze acid oxidation to hydroperoxides. Subsequently, breakdown reactions result in a wide array of metabolites with multiple physiological and ecological functions. These are highly diverse marine algae play crucial rule e.g., signaling, chemical defense, stress response often through aldehydes (PUAs). In this study, green tide-forming macroalgae the genius Ulva (Chlorophyta) were collected at sampling sites lagoon Ria Formosa (Portugal) surveyed for PUAs. We demonstrated that sea-lettuce like but not tube-like morphotypes produce elevated amounts volatile C10-polyunsaturated (2,4,7-decatrienal 2,4-decadienal) upon tissue damage. Moreover, morphogenetic phylogenetic analyses species revealed chemotaxonomic significance perspective biosynthetic pathways. The derived from omega-3 omega-6 (PUFA) 20 or 18 carbon atoms including eicosapentaenoic (C20:5 n-3), arachidonic (C20:4 n-6), stearidonic (C18:4 γ-linolenic (C18:3 n-6). present first evidences lipoxygenase-mediated (11-LOX 9-LOX) eicosanoid octadecanoid pathways transformation C20- C18-polyunsaturated PUAs concomitantly short chain hydroxylated acids.
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