Seven species of red algae from the waters of eastern Long Island, New York were analyzed for their sterol content. The species studied were: Agardhiella tenera, Ahnfeltia plicata, Chondrus crispus, Corallina officinalis^Cystoclonium purpureum var. cirrhosum, Gracilaria foliifera, und Palmaria palmata. The major sterols found belong to C 2 7 compounds. Cholesterol was the predominant sterol in all species with the possible exception of Palmaria palmata. The presence of cholest-7-en-3/3-ol is reported for the first time in the Order Gigartinales. Considerable variations in the total sterol contents among these species were observed, ranging from l mg/kg for Palmaria palmata to 117 mg/kg for Agardhiella tenera. Comparison of the total sterol content of Palmaria palmata with previous analyses (50 to 190 mg/kg) from waters off eastern Canada indicate that significant regional differences in the sterol content of a given species can occur. Introduction The first investigation of marine sterols dealt with marine sponges and dates back to the turn of the Century (Henze 1904). The earliest studies of marine algal sterols began in the 1930s by Heilbron and co-workers (1934, 1935). There have consequently been numerous investigation s since these early studies with considerable contributions from Japan, Great Britain, and
Botanica Marina – de Gruyter
Published: Jan 1, 1982
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