The levels of galactosyl diglycerides and the composition of fatty acids of Spirodela oligorrhiza (Lemnaceae) plants cultivated on a nutrient containing 1% glucose were studied. Controls were grown on a medium without glucose. Between the 10(th) and the 25(th) day of growth the ether-soluble lipids of glucose-stimulated plants contained less monogalactosyl diglyceride (MG) but more digalactosyl diglyceride (DG) than controls. In the same time a marked decrease of the relative amount of C(18:3) acid and an increase of that of C(18:2) and C(16:0) acids was observed. These changes of the lipid composition might be one reason for the structural changes in the chloroplast fine structure of glucose-stimulated Spirodela plants.
Grob
E C.
EC
Institut für organische Chemie der Universität Bern, Switzerland
Eichenberger
W
W