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Publication Type J
Authors Ivanova, A., J. Nechev, L. Evstatieva, A. Usov and K. Stefanov
Title Lipid and sterol composition of Calystegia soldanella and Calystegia sepium - Two halophyte plants from Bulgarian Black Sea coast
Source Dokladi na Bolgarskata Akademiya na Naukite
Abstract Samples of two halophyte plants Calystegia soldanella and Calystegia sepium (genus Calystegia, family Convolvulaceae) were collected and their lipid and sterol content were examined. Collection was carried out in September 2003 at Lake Pomorie in Bulgaria (soil salinity 680 mg in 100 g soil). For comparison samples of C. sepium were collected also from soils with different salinity (330 mg and < 90 mg salts in 100 g soil). The relative amounts of the total lipid extracts and of the triacylglycerols decreased with the decrease of soil salinity, and these of the phospholipids increased. The main sterol in all samples was sitosterol followed by campesterol and sigmasterol. The content of campesterol increased and that of sigmasterol decreased with the decreasing soil salinity. It is suggested that both sterols play an effective role in lipid membrane stability in the investigated plants. The amount of the saturated fatty acids palmitic (16:0) and stearic (18:0) increased in the main lipid groups with the increase of soil salinity, but no significant differences in the concentrations of oleic (18:1), linoleic (18:2) and linolenic (18:3) fatty acids were observed. This fact could be explained only by the assumption that the halophyte plants could react to harmful environment not only by changes in their fatty acid composition, but also by rearrangement of the lipid membranes.
ISSN 1310-1331
ISBN 1310-1331
Publication Date 2005
Year Published 2005
Volume 58
Issue 7
Beginning Page 765-770
Unique Article Identifier BCI:BCI200600005985
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