Specificity of lipids composition change of subcellular membranes of Hydrilla verticillata under the influence of cadmium ions

There was researched the influence of cadmium ions on the lipids composition of chloroplasts, mitochondrions and microsomes of hydrophyte Hydrilla verticillata. The most content of total lipids was in the chloroplasts. In chloroplasts lipids there is higher content of acid С18:3n3., lipids of mitochondrions and microsomes - С18:2n6. Membranes of mitochondrions and microsomes are in a greater degree enriched with sterols, unlike chloroplasts fraction. Under the influence of cadmium ions decreased the content total lipids and changed the composition of lipids. In the fraction of microsomes and mitochondrions was decreased the relative amount of phosphatidylcholine and phosphatidylinositol, but there increased - phosphatidylethanolamine in 1-3 time period and phosphatidic acid up to 24h exposition. In fraction lipids chloroplasts one observed multidirectional changes: sulfolipid content in 1-3 h time period was reliably higher, as well as mono - and digalactosyldiacylglycerols were lower than the control sample. At longer exposition (24h) the relative amount of glycolipids increased in comparison with the control sample. Specificity of lipids composition change depends on cadmium amount found in plant cells, incubation period duration and type of intracellular compartment.