还原性硫化物浓度对排硫硫杆菌固碳能力的影响及其作用机制

he effect of reducing sulfide on the carbon fixation capability of Thiobacillus thioparus (DSM 505) was determined by using Na2S2O3 as the reducing sulfide. In addition, the mechanism was clarified by analyzing the sulfide-oxidizing amount and the transcription characteristics of RubisCO- encoding genes (cbb genes). The result showed that by increasing the concentration of Na2S2O3, the carbon fixation capability and the sulfide-oxidizing amount of Thiobacillus thioparus can be promoted. Moreover, the analysis from the levels of genes revealed that Na2S2O3 has no significant effect on the transcription level and transcription pattern of cbb genes. So Na2S2O3 might improve the carbon fixation capability by being oxidized as electron donors to provide the cells with energy.