Respiration and photosynthesis as alternative energy sources for chloride uptake by Tradescantia albiflora leaf cells

摘要: Summary The relative contributions of respiratory and photosynthetic energy to Cl− absorption by Tradescantia albiflora leaf slices were examined. Light only stimulates uptake from solutions through which N2 is bubbled not aerated solutions. in light or dark inhibited the uncouplers phosphorylation, CCCP DNP, under both aerobic anaerobic conditions. However, DCMU, an inhibitor electron flow, inhibits but does affect light. Oligomycin, oxidative all conditions has little effect on O2 evolution 14C-fixation. Oligomycin greater than These results suggest that powered a cytoplasmic pool ATP. Depending experimental conditions, this ATP can be maintained either cyclic photophosphorylation phosphorylation. In source explained as non-cyclic with respiration being driven photosynthetically produced O2. inhibitory oligomycin photosynthesis suggests second alternative may important. possible effects at site cannot excluded.