Intra-and interspecific variability of fatty acid composition of soft corals

Imbs, Andrey B.; Luu, Hoang Van; Pham, Quoc Long

doi:10.1134/s1063074007010099

Cited by 10 publications

(8 citation statements)

References 18 publications

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“…We suppose that PUFA profiles of the zooxanthellae from soft and reef-building corals are quite similar and some of these acids can be applied as zooxanthellae markers for soft corals. The use of C [20][21][22] PUFA, such as 20:4n-6, 20:5n-3, 22:4n-6, and 22:6n-3, are limited, because high intraspecific variations of the content of these acids exceed interspecific differences [23,24]. In the total FA of corals, octadecapentaenoic acid (18:5n-3) is absent or found only in trace amounts [15,24].…”

Section: Discussionmentioning

confidence: 98%

“…For example, gorgonians survive in conditions where the temperature is between 19°C and 36°C (with a few exceptions). Studies of FA in soft corals have not so far been systematic, and data on the FA contents of total lipids of the corals, especially of gorgonian corals, are limited [17][18][19][20][21][22][23][24]. Only a few works describe the FA of symbiotic dinoflagellates of the reef-building corals [8,11,13,25].…”

Section: Introductionmentioning

confidence: 99%

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Fatty Acid Biomarkers of Symbionts and Unusual Inhibition of Tetracosapolyenoic Acid Biosynthesis in Corals (Octocorallia)

Imbs

Demidkova

Dautova

et al. 2008

Lipids

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Seven zooxanthellae-free species of octocorals (the genera Acanthogorgia, Acabaria, Chironephthya, Echinogorgia, Menella, Ellisella, and Bebryce) and two zooxanthellate octocorals (the genera Paralemnalia and Rumphella) were examined to elucidate their fatty acid (FA) composition. Arachidonic (about 40% of the total FA) and palmitic acids were predominant in all the species studied. Seven furan FA (F-acids) (up to 9.7%) were identified in the azooxanthellate octocorals. The main F-acids were 14,17-epoxy-15-methyldocosa-14,16-dienoic and 14,17-epoxy-15,16-dimethyldocosa-14,16-dienoic acids. In all specimens of Bebryce studeri, C(25-28) demospongic FA (about 20%) were identified. These FA reflect the presence of a symbiotic sponge in B. studeri and can be used as the specific markers for other corals. A significant difference (P < 0.01) between azooxanthellate and zooxanthellate corals was found for odd-chain and methyl-branched saturated FA, 18:1n-7, and 7-Me-16:1n-10; that indicated the presence of an advanced bacterial community in azooxanthellate corals. The zooxanthellate species were distinguished by significant amounts of 18:3n-6, 18:4n-3, and 16:2n-7 acids, which are proposed as the markers of zooxanthellae in soft corals. Contrary to the normal level of 24:5n-6 (9.4%) and 22:4n-6 (0.6%), unexpected low concentrations of 24:5n-6 (0.4%) accompanied by a high content of 22:4n-6 (up to 11.9%) were detected in some specimens. The presence of an unknown factor in octocorals, specific for n-6 PUFA, which inhibited elongation of 22:4n-6 to 24:4n-6, is conjectured.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Fatty Acid Biomarkers of Symbionts and Unusual Inhibition of Tetracosapolyenoic Acid Biosynthesis in Corals (Octocorallia)

Imbs

Demidkova

Dautova

et al. 2008

Lipids

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“…4). The comparison of FA composition of several soft coral genera has earlier shown that high intraspecific dispersion in the content of 22:6n-3 exceeded interspecific differences (Imbs et al 2007c). We suggest that the use of 22:6n-3 as a chemotaxonomic marker for soft corals is limited.…”

Section: Distribution Of Fatty Acidsmentioning

confidence: 95%

Distribution of lipids and fatty acids in corals by their taxonomic position and presence of zooxanthellae

Imbs¹,

Латышев²,

Dautova³

et al. 2010

Mar. Ecol. Prog. Ser.

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The lipid class and fatty acid (FA) composition for 93 species of reef-building and soft corals from the South China Sea (Vietnam) were analyzed and statistically compared to study systematic patterns of the distribution of lipids in corals and the influence of zooxanthellae on the lipids of symbiont-host association. The lipid and FA compositions of hexacorals and octocorals significantly correlated with their taxonomic position, but the lipid features of species within each of these systematic groups mainly depended on the presence of zooxanthellae. The hexacorals had lower content of polar lipids (PL), sterols (ST), and monoalkyldiacylglycerols (MADAG), but higher content of triacylglycerols (TG) and wax esters (WE) than the octocorals. On average, zooxanthellate species contained less structural lipids (PL+ ST), but more MADAG when compared to azooxanthellate species. Tetracosapolyenoic acids 24:5n-6 and 24:6n-3 were chemotaxonomic markers for octocorals, whereas 22:5n-6 was a marker for Milleporidae. A strong correlation was apparent between zooxanthellate coral family and/or genus and the content of the unsaturated FA; 12 FAs were significant for the separation of azooxanthellate and zooxanthellate specimens. The latter had lower concentrations of 7-Me-16:1n-10, 18:1n-7, and six C 20 -24 polyunsaturated FA, but higher concentrations of 16:0, 16:2n-7, 18:3n-6, and 18:4n-3. The presence of > 2% of 18:3n-6 and 18:4n-3 of total FA is characteristic of zooxanthellate corals. An inverse correlation was established between the content of 18:3n-6 and 16:2n-7 in zooxanthellate soft corals. The present study highlights the importance of zooxanthellae in coral lipid metabolism, especially when compared with symbiont-host exchanges in reef-building and soft corals.

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“…An analysis comparing 14 hard coral species from the Indo-Pacific region, which fall under the Anthozoa and Hydrozoa classes, highlighted that certain coral families had a significant presence of specific FAs: Pocilloporidae contained 20:3n-6; Acroporidae had 18:3n-6, 18:4n-3, and 22:4n-6; and Poritidae had 18:3n-6 [100]. Subsequent research refined these findings, identifying distinct FA sets for several families [204] (Figure 35). For instance, the hydrocoral family Milleporidae (Hydrozoa) had a unique FA composition that significantly differed from that of genuine corals.…”

Section: Chemotaxonomic Significance Markers Of Symbionts and Food So...mentioning

confidence: 99%

Coral Lipids

Imbs,

Dembitsky

2023

Marine Drugs

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Reef-building corals, recognized as cornerstone species in marine ecosystems, captivate with their unique duality as both symbiotic partners and autotrophic entities. Beyond their ecological prominence, these corals produce a diverse array of secondary metabolites, many of which are poised to revolutionize the domains of pharmacology and medicine. This exhaustive review delves deeply into the multifaceted world of coral-derived lipids, highlighting both ubiquitous and rare forms. Within this spectrum, we navigate through a myriad of fatty acids and their acyl derivatives, encompassing waxes, sterol esters, triacylglycerols, mono-akyl-diacylglycerols, and an array of polar lipids such as betaine lipids, glycolipids, sphingolipids, phospholipids, and phosphonolipids. We offer a comprehensive exploration of the intricate biochemical variety of these lipids, related fatty acids, prostaglandins, and both cyclic and acyclic oxilipins. Additionally, the review provides insights into the chemotaxonomy of these compounds, illuminating the fatty acid synthesis routes inherent in corals. Of particular interest is the symbiotic bond many coral species nurture with dinoflagellates from the Symbiodinium group; their lipid and fatty acid profiles are also detailed in this discourse. This exploration accentuates the vast potential and intricacy of coral lipids and underscores their profound relevance in scientific endeavors.

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Intra-and interspecific variability of fatty acid composition of soft corals

Cited by 10 publications

References 18 publications

Fatty Acid Biomarkers of Symbionts and Unusual Inhibition of Tetracosapolyenoic Acid Biosynthesis in Corals (Octocorallia)

Fatty Acid Biomarkers of Symbionts and Unusual Inhibition of Tetracosapolyenoic Acid Biosynthesis in Corals (Octocorallia)

Distribution of lipids and fatty acids in corals by their taxonomic position and presence of zooxanthellae

Coral Lipids

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