Study of lipids of the thylakoid membranes from moss Marchantia polymorphain monolayers

Monolayers of seven fractions of natural lipids (phosphatidylinositol, sulf oquinovosyldiacylglycerol, phosphatidylcholine, digalactosyldincylglycerol, phosphatidylglycerol, phosphatidylethanolamine, monogalactosyldiacylglycer ol) isolated from photoautotraphic cell culture of moss, Marchantia polymor pha, grown in normal conditions and at light stress, have been prepared for the first time. The area occupied by lipid molecule of the fractions 4 and 5 (digalactosyld iacylglycerol, phosphatidylglycerol) are shown to increase significantly (f rom 0,50 to 0,80 nm(2) and from 0,47 to 0,63 nm(2) respectively), but decre ase for the fraction 2 (sulfoquinovosyldiacylglycerol) from 0,40 to 0,32 nm (2) It correlates with our previous data, which show that the redistributio n of the double bounds occurs in the aliphatic chains of these lipids. This allows making conclusion about the state of the lipid bilayer of thylakoid membranes.