期刊
CHEMISTRY AND PHYSICS OF LIPIDS
卷 183, 期 -, 页码 100-109出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.chemphyslip.2014.05.008
关键词
Ulva; Decadienal; Oxylipin; Infochemicals; Biofuel; Green tide
资金
- Taif University (Kingdom of Saudi Arabia)
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BPD/63703/200, SFRH/BPD/64990/2009]
- Jena School for Microbial Communication (Germany)
- European Community's Seventh Framework Program (FP7) at the Algarve Marine Sciences Centre (CCMAR) in Faro [227799]
- FCT project INVASEA [PTDC/MAR/098069/2008]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/64990/2009] Funding Source: FCT
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 C-10-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 C-20- and C-18-polyunsaturated fatty acids into PUAs and concomitantly into short chain hydroxylated fatty acids. (C) 2014 Elsevier Ireland Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据