TISSUE-SPECIFICITY OF MITOCHONDRIAL F0F1-ATPASE ACTIVITY OF LILIUM-LONGIFLORUM PLANT

A large difference was found in the activities of oligomycin-sensitive mitochondrial F0F1-ATPase isolated from different tissues of Lilium l ongiflorum plants. The enzyme activity of F0F1-ATPase in pollen was th e highest, while that in bulbs was the lowest. When ATPases were cross -reconstituted from F-1-ATPases and F-1-depleted submitochondrial part icles (SMP), ATPases reconstituted from F-1-depleted pollen SMP showed the higher activity regardless of the source of F-1-ATPase. Fatty aci d compositions of phospholipids in SMP were also different between bul bs and pollen. These suggest that the F-0 portion and/or its environme nt are important for regulation of F0F1-ATPase activity in L. longiflo rum plant.