Lipid components of the mediterranean seagrass Posidonia Oceanica

Viso, Alma; Pesando, D.; Bernard, Pauline; Marty, J.-C.

doi:10.1016/0031-9422(93)80012-h

Cited by 84 publications

(46 citation statements)

References 27 publications

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“…The leaf material was characterized by a large proportion of C 16 -alkanoic acid ME (54%), which originates from either cutin in the cuticles or free palmitic acid (Viso et al 1993). Minor peaks for C 14 and C 17 -C 28 fatty acid MEs and C 22 -C 28 ω-methoxy fatty acid MEs, with strong evenover-odd carbon numbers, were found as well (8% in leaf, 1 ± 1% in the other samples).…”

Section: Thermally Assisted Hydrolysis and Methylation (Thm-gc-ms)mentioning

confidence: 90%

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

et al. 2016

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Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat.Aquatic Botany http://dx.doi.org/10. 1016/j.aquabot.2016.05.009 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Graphical abstract Highlights-Analytical pyrolysis applied to Posidonia seagrass organs and marine mat deposit -Posidonia phenolic composition dominated by p-hydroxybenzoic acids -Peat-like mat deposits composed predominantly of root, rhizome and sheath materials -We suggest a link between Posidonia chemistry and C accumulation in mats AbstractPosidonia oceanica forms extensive peat-like deposits (mats) in Mediterranean coastal waters, which have a potential as carbon sinks and archives of environmental change.Nonetheless, the organic chemistry of both P. oceanica plant materials, as well as the environmental and diagenetic effects on the composition of its detritus, is poorly understood.We analyzed plant organs of P. oceanica and the coarse organic matter from a mat core spanning 750 yrs using pyrolysis techniques (PY-GC-MS and THM-GC-MS) to improve our understanding of their molecular properties and their preservation upon mat development. It

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Section: Thermally Assisted Hydrolysis and Methylation (Thm-gc-ms)mentioning

confidence: 90%

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

et al. 2016

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“…Hydrogen atoms in nalkanes are carbon-bound and therefore non-exchangeable, at least at low temperatures (Schimmelmann et al, 1999). In addition, biological sources of n-alkanes can be determined based on their molecular structure (Glinton and Hamilton, 1967;Han and Calvin, 1969;Cranwell et al, 1987;Rieley et al, 1991;Viso et al, 1993;Ficken et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Retraction: Paleoclimatic implications of the hydrogen isotopic composition of terrigenous n-alkanes from Lake Yamzho, southern Tibetan Plateau

Zhonghuan

Mügler

et al. 2009

Geochem. J.

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The hydrogen isotopic composition (δD) of leaf water used for biosynthesis of n-alkanes can be modified by climate. Therefore, the δD can be considered as potential paleoclimatic proxy to explore. We compared measured δD values of alkanes (n-C 25 to n-C 31 ) extracted from a short sediment profile spanning the past 50 years with a 7-year resolution from Lake Yamzho, southern Tibetan Plateau. Climatic control was reconstructed using meteorological records of the nearby Langkazi and Lhasa weather stations. We found that the δD values of the n-alkanes correlated with the mean annual air temperature and significantly correlated with the mean growing season air temperature. On the other hand, the δD values show poor correlations with both rainfall amount and relative humidity. These results indicate that stable isotope composition of n-alkanes could be an excellent proxy for paleotemperature reconstruction.

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“…The presence of long chain fatty acids (C22-C34) was identified as the marker to differentiate the P. oceanica residues from algal constituents. The lipid composition of seagrasses can be used widely for assessing the existing inter-relationship in the marine food web 54 .…”

Section: Biological Markersmentioning

confidence: 99%

“…The Fatty acids from lipids of P. oceanica collected in France and Greece were analyzed in detail using GC/FID in comparison with retention times of reference compounds 54 that portrayed long chain fatty acids (C22-C34) as a feature setting P. oceanica apart from sympatric species of algae, thus possibly enabling identification of P. oceanica residues in marine sediments. This can be effectively used in biogeochemical studies.…”

Section: Lipids and Fatty Acidsmentioning

confidence: 99%

Bioactive natural products from marine angiosperms: abundance and functions

Subhashini

Dilipan

Thangaradjou

et al. 2013

Nat. Prod. Bioprospect.

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This review explores the natural products of seagrass that are to be exploited for their bioactive potential. Beside from portraying the presence of a wide array of secondary compounds such as phenols, flavonoids, sterols and lipids from different seagrass species, the focus is on novel natural products projecting towards their biological applications. Though there are a significant number of reports on the abundance of secondary metabolites from seagrass and their bioactive derivatives, only a small number of reports explore their functional and defensive characteristics. Efforts have been made to collate the available information on seagrass natural products and clarify their function and metabolic pathway's. It is emphasized that metabolic profiling of seagrass should be extensively progressed to obtain a deeper knowledge about the specific roles of each natural product. The investigation of seagrass natural products for their bioactive potential would most likely result in the detection of surprising and unexpected novel chemical structures and clinical leads that may be useful to mankind.Keywords: natural products, phenolic compounds, phenylpropanoid derivatives, seagrasses, secondary metabolites Seagrasses-the Marine AngiospermsSeagrasses, a functional group of flowering plants rooted in the world's coastal oceans, are well known for their secondary metabolites. The current comprehensive review on "Bioactive natural products from marine angiosperms'' was performed in such a way that recent discoveries in the field of seagrass secondary metabolism need to be reviewed. In this review is not possible to detail in a just few pages the full gamut of studies, since our understanding of natural products from seagrasses has increased markedly in the last few decades. Several studies have documented the abundance of these natural metabolites in seagrasses and some have focused on their bioactive potential. Though there are probably 72 species of seagrasses worldwide, only a few have been explored for their natural products and their determinant role. Recently, the secondary metabolites of P. oceanica were compiled 1 , appraised and were summarized into 51 natural products including phenols, phenylmethane, phenylethane, phenylpropane derivatives and their esters, chalkones and flavonoids. These chemical compounds synthesized by secondary metabolic pathways are not involved in the normal growth, development or reproduction but usually have roles in adaptation processes under stress conditions.A severe or long lasting stress factor could induce an excessive shift between primary and secondary metabolism and consequently, a diversion of essential available resources from growth to defense 2 , since the products of primary metabolism are the precursors for secondary metabolic pathways. The topics provided in this paper are limited to seagrass secondary metabolism although it has become clear that a clear line between primary and secondary metabolism cannot be drawn. Hence, the present review aims to collate th...

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Lipid components of the mediterranean seagrass Posidonia Oceanica

Cited by 84 publications

References 27 publications

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

Molecular composition of plant parts and sediment organic matter in a Mediterranean seagrass (Posidonia oceanica) mat

Retraction: Paleoclimatic implications of the hydrogen isotopic composition of terrigenous n-alkanes from Lake Yamzho, southern Tibetan Plateau

Bioactive natural products from marine angiosperms: abundance and functions

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