| Title: | "Prevalence and mechanism of polyunsaturated aldehydes production in the green tide forming macroalgal genus Ulva (Ulvales, Chlorophyta)" |
| Author(s): | Alsufyani T; Engelen AH; Diekmann OE; Kuegler S; Wichard T; |
| Address: | "Friedrich Schiller University Jena, Institute for Inorganic and Analytical Chemistry, Lessingstr. 8, Jena 07743, Germany. CCMAR, CIMAR-Laboratorio Associado, Faculdade de Ciencias e Tecnologia, Universidade do Algarve, Campus Gambelas, Faro 8005-139, Portugal. Friedrich Schiller University Jena, Institute for Inorganic and Analytical Chemistry, Lessingstr. 8, Jena 07743, Germany. Electronic address: Thomas.Wichard@uni-jena.de" |
| DOI: | 10.1016/j.chemphyslip.2014.05.008 |
| ISSN/ISBN: | 1873-2941 (Electronic) 0009-3084 (Linking) |
| Abstract: | "Lipoxygenase/hydroperoxide lyase mediated transformations convert polyunsaturated fatty acids into various oxylipins. First, lipoxygenases catalyze fatty acid oxidation to fatty acid hydroperoxides. Subsequently, breakdown reactions result in a wide array of metabolites with multiple physiological and ecological functions. These fatty acid transformations are highly diverse in marine algae and play a crucial rule in e.g., signaling, chemical defense, and stress response often mediated through polyunsaturated aldehydes (PUAs). In this study, green tide-forming macroalgae of the genius Ulva (Chlorophyta) were collected at various sampling sites in the lagoon of the Ria Formosa (Portugal) and were surveyed for PUAs. We demonstrated that sea-lettuce like but not tube-like morphotypes produce elevated amounts of volatile C10-polyunsaturated aldehydes (2,4,7-decatrienal and 2,4-decadienal) upon tissue damage. Moreover, morphogenetic and phylogenetic analyses of the collected Ulva species revealed chemotaxonomic significance of the perspective biosynthetic pathways. The aldehydes are derived from omega-3 and omega-6 polyunsaturated fatty acids (PUFA) with 20 or 18 carbon atoms including eicosapentaenoic acid (C20:5 n-3), arachidonic acid (C20:4 n-6), stearidonic acid (C18:4 n-3), and gamma-linolenic acid (C18:3 n-6). We present first evidences that lipoxygenase-mediated (11-LOX and 9-LOX) eicosanoid and octadecanoid pathways catalyze the transformation of C20- and C18-polyunsaturated fatty acids into PUAs and concomitantly into short chain hydroxylated fatty acids" |
| Keywords: | "Aldehydes/*metabolism Catalysis Fatty Acids, Unsaturated/*biosynthesis Lipoxygenase/*metabolism Signal Transduction/*physiology Ulva/*metabolism Biofuel Decadienal Green tide Infochemicals Oxylipin Ulva;" |
| Notes: | "MedlineAlsufyani, Taghreed Engelen, Aschwin H Diekmann, Onno E Kuegler, Stefan Wichard, Thomas eng Research Support, Non-U.S. Gov't Ireland 2014/06/11 Chem Phys Lipids. 2014 Oct; 183:100-9. doi: 10.1016/j.chemphyslip.2014.05.008. Epub 2014 Jun 7" |
