EFFECT OF LEAD ON THE LIPID-METABOLISM IN SPINACH LEAVES AND THYLAKOID MEMBRANES

The effects of lead and sodium acetate treatment on the lipid composit ion of leaves, thylakoid membranes and cell debris of spinach were inv estigated. The concentration of lead in leaves and cell debris was hig her than that in thylakoid membranes, probably due to a protection of photosynthetic apparatus. The lead treatment lead to decrease of conte nts of monogalactosyl diacylglycerols and phospholipids and to increas e of the other glycolipids in the thylakoid membranes. There were no s tatistically significant differences between the total lipids of thyla koid membranes after incubation with lead and sodium acetate, which wa s an indication that in this case the effect of metal ion was not spec ific.