0000000000072860
AUTHOR
I. Grasmück
Effect of Light on the Composition of Mitochondrial Lipids from Hypocotyl Hooks of Bean Seedlings (Phaseolus vulgaris L.).
Summary Mitochondria were isolated and roughly purified from bean seedlings (phaseolus vulgaris) treated with different red light (660 nm) irradiation programmes. Etiolated seedlings were irradiated for short terms or grown in red light. The mitochondria from differently treated seedlings were analysed for their phospholipid and fatty acid patterns. The mitochondrial phospholipid patterns from green and etiolated seedlings were rather similar. This was also valid for the fatty acids from the phospholipid fraction whereas the fatty acid patterns of the glycolipids showed differences. Remarkable changes were observed in the phospholipid pattern of the mitochondrial fraction after short-term i…
The Influence of Acetylcholine and Choline on the Incorporation of Phosphate into Phospholipids of Etiolated Bean Hypocotyl Hooks
Summary Acetylcholine influenced the radiolabelling of phospholipids in vivo in etiolated hypocotyl tissue of dwarf beans in darkness. Under aerobic conditions the specific activity of the phospholipids was decreased and under anaerobic conditions increased. The biosynthesis of phospholipids was strongly increased by the bivalent cations calcium and manganese and decreased by 2,4-dinitrophenol, anaerobiosis, atropine and ascorbic acid. Magnesium stimulated the uptake of the radioactive phosphate but not the specific activity of the phospholipids. The results are discussed in comparison with the «phospholipid-effect» of acetylcholine in animal tissues.