Lipid composition of three macrophytes from the Caspian Sea

Dembitsky, Valery M.; Řezanka, Tomáš; Розенцвет, О. А.

doi:10.1016/0031-9422(93)85014-i

Cited by 44 publications

(21 citation statements)

References 11 publications

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“…These marine macroalgae contain oleic [18:1(n À 9)] (8), linoleic [18:2(n À 6)] (12), a-linolenic [18:3(n À 3)] (15), arachidonic [20:4(n À 6)] (20) and eicosapentaenoic acids [20:5(n À 3)] (22), as major monoand poly-unsaturated fatty acids. These fatty acids have been typically found in marine macroalgae (e.g., Jamieson and Reid, 1972;Demebitsky et al, 1993;Fleurence et al, 1994) as well as microalgae (e.g., Stefanov et al, 1988;Dembitsky et al, 1990;Viso and Marty, 1993;Dunstan et al, 1994). Though small amounts of uncommon 16:1(n À 5) fatty acid (7) is also identified in two brown macroalgae, this fatty acid was reported previously in some brown microalgae (Khotimchenko, 1995).…”

Section: Molecular Distributionsmentioning

confidence: 89%

Hydrogen isotopic fractionations during desaturation and elongation associated with polyunsaturated fatty acid biosynthesis in marine macroalgae

2004

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Section: Molecular Distributionsmentioning

confidence: 89%

Hydrogen isotopic fractionations during desaturation and elongation associated with polyunsaturated fatty acid biosynthesis in marine macroalgae

2004

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“…Among the fatty acids analyzed here, short-chain (n-C 14 -n-C 18 ) FA are biosynthesized by all plants but they are major lipids in freshwater microalgae (Cranwell et al, 1988(Cranwell et al, , 1990Volkman et al, 1998) and freshwater macroalgae (Dembitsky et al, 1993;Rozentsvet et al, 1995Rozentsvet et al, , 2002. Long-chain (n-C 24 -n-C 28 ) FA are components of epicuticular waxes of terrestrial higher plants (Cranwell et al, 1987;Volkman, 2006) and are abundant in soils.…”

Section: Provenance Of Oc In the Sacramento-san Joaquin Deltamentioning

confidence: 98%

The nature of organic carbon in density-fractionated sediments in the Sacramento-San Joaquin River Delta (California)

Wakeham

Canuel

2016

Biogeosciences

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Abstract. Rivers are the primary means by which sediments and carbon are transported from the terrestrial biosphere to the oceans but gaps remain in our understanding of carbon associations from source to sink. Bed sediments from the Sacramento-San Joaquin River Delta (CA) were fractionated according to density and analyzed for sediment mass distribution, elemental (C and N) composition, mineral surface area, and stable carbon and radiocarbon isotope compositions of organic carbon (OC) and fatty acids to evaluate the nature of organic carbon in river sediments. OC was unevenly distributed among density fractions. Mass and OC were in general concentrated in mesodensity (1.6-2.0 and 2.0-2.5 g cm −3 ) fractions, comprising 84.0 ± 1.3 % of total sediment mass and 80.8 ± 13.3 % of total OC (TOC). Low-density (< 1.6 g cm −3 ) material, although rich in OC (34.0 ± 2.0 % OC) due to woody debris, constituted only 17.3 ± 12.8 % of TOC. High-density (> 2.5 g cm −3 ) organicpoor, mineral-rich material made-up 13.7 ± 1.4 % of sediment mass and 2.0 ± 0.9 % of TOC. Stable carbon isotope compositions of sedimentary OC were relatively uniform across bulk and density fractions (δ 13 C −27.4 ± 0.5 ‰). Radiocarbon content varied from 14 C values of −382 (radiocarbon age 3800 yr BP) to +94 ‰ (modern) indicating a mix of young and old OC. Fatty acids were used to further constrain the origins of sedimentary OC. Short-chain n-C 14 -n-C 18 fatty acids of algal origin were depleted in 13 C (δ 13 C −37.5 to −35.2 ‰) but were enriched in 14 C ( 14 C > 0) compared to long-chain n-C 24 -n-C 28 acids of vascular plant origins with higher δ 13 C (−33.0 to −31.0 ‰) but variable 14 C values (−180 and 61 ‰). These data demonstrate the potentially complex source and age distributions found within river sediments and provide insights about sediment and organic matter supply to the Delta.

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“…Betaine lipids occur in bacteria 30 , fungi 31,32 , moss species 33 , and in a number of brown, green and red algae 26,29,34 as well as in lichens 7,35,36 . As for higher plants, betaine lipids have been found in bryophytes 31,37 , in ferns 38 , and other plants 39 .…”

Section: Resultsmentioning

confidence: 99%

“…The obtained fractions were further analyzed by HR-TLC as described previously 25,26 . Neutral lipids were separated on 10 × 20 cm silica gel plates (Silica Gel 60, Merck) with toluene-hexane-formic acid (150:70:2, v/v) mixture.…”

Section: High-performance Liquid Chromatographic Analysismentioning

confidence: 99%

Biodiversity of the Chemical Constituents in the Epiphytic Lichenized Ascomycete Ramalina Lacera Grown on Difference Substrates Crataegus Sinaicus, Pinus Halepensis, and Quercus Calliprinos

Hanŭs¹,

Temina²,

Dembitsky³

2008

Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub

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Aim:The identifi cation and evaluation of lichen metabolite production by the epiphytic lichenized ascomycete Ramalina lacera collected from diff erent substrates: Crataegus sinaicus, Pinus halepensis, and Quercus calliprinos.Methods: Chemical constituents were characterized by GC-MS, HPLC, HR-TLC, and other chemical methods. Results:The most abundant fatty acids were α-linolenic acid, oleic acid, and palmitic acid but a considerable variability of the ester composition from one to another was found. A comparison of neutral lipids, glycolipids, polar lipids and fatty acid composition of the tree-growing lichen Ramalina lacera was done. Diacylglyceryl-N,N,N-trimethylhomoserine, diaclyglycerylhydroxymethyl-N,N,N-trimethyl-β-alanine, phosphatidylcholine, and phosphatidylinositol were found as major components among polar lipids. Diff ractaic, lecanoric, norstictic, protocetric, and usnic acids were isolated as major aromatic compounds in all samples of R. lacera.Conclusions: We evaluated a diversity of fatty acids, lipids, and aromatic compounds produced by the samples of Ramalina lacera growing on diff erent tree-substrates, Crataegus sinaicus, Pinus halepensis and Quercus calliprinos.

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Lipid composition of three macrophytes from the Caspian Sea

Cited by 44 publications

References 11 publications

Hydrogen isotopic fractionations during desaturation and elongation associated with polyunsaturated fatty acid biosynthesis in marine macroalgae

Hydrogen isotopic fractionations during desaturation and elongation associated with polyunsaturated fatty acid biosynthesis in marine macroalgae

The nature of organic carbon in density-fractionated sediments in the Sacramento-San Joaquin River Delta (California)

Biodiversity of the Chemical Constituents in the Epiphytic Lichenized Ascomycete Ramalina Lacera Grown on Difference Substrates Crataegus Sinaicus, Pinus Halepensis, and Quercus Calliprinos

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