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The effect of fluoride on the growth and fatty acid composition of Sphagnum fimbriatum at two temperatures
Author(s) -
SIMOLA LIISA KAARINA,
KOSKIMIESSOININEN KRISTIINA
Publication year - 1980
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1980.tb02687.x
Subject(s) - linoleic acid , sphagnum , chemistry , oleic acid , palmitic acid , linolenic acid , fatty acid , composition (language) , food science , biochemistry , chromatography , botany , biology , ecology , linguistics , philosophy , peat
The fatly acid composition of different lipid fractions (neutral, glyco‐ and phospholipids) was studied in Sphagnum fimbriatum Wils, gametophytes grown in aseptic cultures at two temperatures (15°C and 25°C). The effect of a growth‐retarding concentration (0.1 m M ) of KF was also investigated. Fifteen‐day treatment with KF affected the fatty acid composition more strongly at the higher than at the lower temperature. The proportion of palmitic acid (16:0) increased but the proportion of linoleic (18:2) decreased in all the lipid fractions, and that of linolenic (18:3) acid decreased in the fractions containing glyco‐ and neutral lipids. This indicates that the fluoride ions inhibit lengthening of the fatty acid chain. Compared with gametophytes grown at 25°C, material cultivated at 15°C had a much higher proportion of a highly unsaturated fatty acid, linolenic acid (18:3), in all the lipid fractions, but a lower proportion of oleic acid (18:1) in the neutral and phospholipids, and a lower proportion of linoleic (18:2) acid in all three fractions.