A NEW SOURCE FOR 4-METHYL STEROLS IN FRESH-WATER SEDIMENTS - UTRICULARIA-NEGLECTA L (LENTIBULARIACEAE)

被引：13

作者：

KLINK, G

DREIER, F

BUCHS, A

GULACAR, FO

机构：

[1] Laboratoire de Spectrométrie de Masse, Université de Genève, 1211 Genève 4

来源：

ORGANIC GEOCHEMISTRY | 1992年 / 18卷 / 06期

关键词：

STEROLS; 4-METHYL STEROLS; CITROSTANOL; UTRICULARIA-NEGLECTA L; UTRICULARIA-AUSTRALIS; LENTIBULARIACEAE; LACUSTRINE SEDIMENTS;

D O I：

10.1016/0146-6380(92)90045-Y

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Lipid analyses of several aquatic plants growing in a freshwater lake allowed us to show that Utricularia neglecta L. (Lentibulariaceae), a world-wide distributed submerged aquatic plant, is an important potential source for sedimentary 4-methyl sterols in lacustrine environments. This plant contains, besides the 4-desmethyl sterols, high proportions of 4-methyl sterols, 4alpha-methyl-24-ethyl-5alpha-cholestan-3beta-ol (citrostanol) being predominant. Other 4-methyl sterols include 4alpha-methyl-5alpha-cholestan-3beta-ol, 4alpha,24-dimethyl-5alpha-cholestan-3beta-ol, 4alpha,23,24-trimethyl-5alpha-cholest-22-en-3beta-ol (dinosterol) and 4alpha,23,24-trimethylcholesta-5,22-dien-3beta-ol. Steroidal ketones comprising both 4-desmethyl and 4-methyl components are also present in significant amounts. The similarity of the distribution of the 4-methyl sterols in the surface sediment with those in U. neglecta L. suggests that this plant is an important source for sedimentary 4-methyl sterols.

引用

页码：757 / 763

页数：7

共 34 条

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