Fatty acid composition and antioxidant activity of Antarctic marine sponges of the genus Latrunculia

摘要: The fatty acid composition of marine cold-water sponges genus Latrunculia, namely Latrunculia bocagei Ridley and Dendy, 1886, biformis Kirkpatrick, 1907, for which no data had been previously reported, has examined. High levels long-chain acids (C24–30) with high unsaturation (mainly polyunsaturation), incidence branched- odd-chain in sponges are suggested to be partially connected their specific cell membrane requirements surmount the negative effects low temperatures enable growth extreme environments. Furthermore, variations profile at species level may reflect compositions or quantities symbiotic microorganisms that commonly represent up 60 % sponge wet weight. lipid-rich extracts from five specimens dredged Bransfield Strait near Antarctic Peninsula, were obtained using supercritical carbon dioxide analyzed gas chromatography–mass spectrometry–flame ionization detection. antioxidant activities these determined photochemiluminescent method. Along common acids, chemical analyses revealed very (C22, C24). Differences seen between both different same species. observed differences do not seem habitat depth of specimen, but rather indicate within associated microbiome. showed activities, confirming they contain lipidic compounds strongly scavenge free radicals.