Long-chain (14)C-fatty acids applied to the surface of expanding spinach leaves were incorporated into all major lipid classes. When applied in diethyleneglycol monomethyl ether solution, as done by previous workers, [(14)C]palmitic acid uptake was much lower than that of [(14)C] oleic acid.
In freezing experiments with isolated spinach thylakoids (Spinacia oleracea L. cv. Monatol) the cryoprotective efficiency of various low-molecular-weight polyols was determined. The activity of cyclic photophosphorylation was used as an assay for the functional integrity of the membranes. The
During short term labeling of expanding leaves of seven plant species with [1-(14)C]acetate, 35 to 64% of the label incorporated into lipids was found in phosphatidylcholine and 5 to 24% in phosphatidylglycerol. In pumpkin, sunflower, broad bean, and maize, only 4 to 12% of the label was found in
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