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Effect of Changed Environmental Conditions on Glycolipids of the Mosses Pleurozium Schreberi and Ceratodon purpureus
Author(s) -
ARO EVAMARI,
KARUNEN PIRJO
Publication year - 1979
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.1399-3054.1979.tb01687.x
Subject(s) - polyunsaturated fatty acid , moss , biology , botany , fatty acid , chemistry , food science , biochemistry
The effect of changed environmental conditions on the content of glycolipids and component fatty acids was studied in the moss species Pleurozium schreberi and Ceratodon purpureus . The mosses were collected from their natural habitats when frozen and covered by snow. After one week's exposure to rhythmic light (150 μE m −2 s −1 , 12 h 17°C) no changes were observed in the absolute amount of fatty acids in either mono‐ (MGDG) or diglycosyl diglyceride (DGDG) fractions. Some changes were recorded in the content of individual fatty acids, however. The long chain, polunsaturated fatty acids (mainly 20:4ω6 and 20:5ω3 in P. schreberi and in addition 16:3ω3 and 18:3ω3 in C. purpureus ) tended to decrease and the shorter chain, more saturated ones increased correspondingly. Under continuous light conditions (17°C) the total amount of fatty acids decreased in both MGDG and DGDG fractions, more significantly at 150 than at 75 μE m −2 s −1 . This was due to the accelerated degradation and/or decreased synthesis of polyunsaturated fatty acids, which in this case was not totally compensated by the increase in shorter chain, more saturated ones.