Application of fatty acids for chemotaxonomy of reef-building corals.
Sixteen scleractinian species of six coral families (Acroporidae, Pocilloporidae, Poritidae, Faviidae, Pectiniidae, and Fungiidae) from Vietnam were analyzed for fatty acid (FA) composition. Except for the Poritidae species, total lipids of the corals had the same set of FAs, about 50% of them being unsaturated acids. Some coral families had high levels of characteristic FAs: 20:3(n-6), 20:4(n-3), and 22:6(n-3) in Pocilloporidae; 18:1(n-9) and 22:6(n-3) in Poritidae; and 18:3(n-6) and 22:5(n-3) in Faviidae. For the first time in hexacorals, unsaturated C(24) FAs (24:1(n-9), 24:2(n-6), 24:2(5,9), 24:3(5,9,17), and 24:4(n-3)) were discovered in the Poritidae species. The highest level of 18:1(n-7), odd-chain and branched FAs (7.5% in total) was detected in Sandalolitha robusta. The data obtained on the contents of ten principal C(18)-C(22) polyunsaturated FAs (PUFAs) for the 16 specimens were combined with data on the 19 reef-building coral specimens investigated previously and subjected to multidimensional scale analysis (MSA). The representative coral families (Acroporidae, Pocilloporidae, Poritidae, Faviidae, Dendrophylliidae, and Milleporidae) were separated by MSA according to the composition of their principal PUFAs. Therefore, PUFAs may serve as chemotaxonomic markers for reef-building corals at the family level. Family-specific compositions of coral zooxanthellae characterized by different PUFA profiles, which affect the PUFA content of whole coral colonies, were supposed to be the probable cause of the discovered chemotaxonomic distinctions between reef-building corals.
Imbs
Andrey B
AB
Laboratory of Comparative Biochemistry, Zhirmunsky Institute of Marine Biology, Far Eastern Branch of the Russian Academy of Sciences, Palchevskogo str., 17, 690041, Vladivostok, Russian Federation. andreyimbs@hotmail.com
Demidkova
Darja A
DA
Latypov
Yurii Y
YY
Pham
Long Q
LQ
D000818:Animals; D037421:Anthozoa / Q000737:chemistry* / Q000145:classification*; D002965:Classification / Q000379:methods; D005227:Fatty Acids / Q000032:analysis*; D005231:Fatty Acids, Unsaturated / Q000032:analysis; D008055:Lipids / Q000032:analysis; D013045:Species Specificity; D014744:Vietnam
D005227:Fatty Acids; D005231:Fatty Acids, Unsaturated; D008055:Lipids
Biochim Biophys Acta. 2000 Jul 19;1486(2-3):219-31
10903473
Microbiol Rev. 1991 Jun;55(2):288-302
1886522
Mol Ecol. 2004 Aug;13(8):2445-58
15245416
Adv Mar Biol. 2003;46:225-340
14601414
Comp Biochem Physiol B Biochem Mol Biol. 2003 Jul;135(3):533-7
12831773
Lipids. 1980 Oct;15(10):799
27520781
Phytochemistry. 2005 Nov;66(21):2557-70
16226285
Biochim Biophys Acta. 1991 May 8;1083(2):161-5
1674660
Prog Chem Fats Other Lipids. 1978;16:279-308
358268
Phytochemistry. 2003 Jan;62(2):191-5
12482455