一株沼泽红假单胞菌对氮磷的同化能力

The Nitrogen and Phosphate Assimilating Capacity of a Rhodopseudomonas palustris Strain

采用单因素和正交试验研究了不同营养成分对一株沼泽红假单胞菌氮磷同化能力的影响。结果表明,KH2PO4对沼泽红假单胞菌同化氮磷的能力有显著的影响。在同等发酵生物量的情况下,当NH4Cl为0.05 g/L、KH2PO4为1.40 g/L、酵母抽提物为1.00 g/L时,可使沼泽红假单胞菌的氮磷同化率分别由原来的32.51%和5.98%提高到48.02%和7.76%。

The effect of different nutriednt types on assimilative capacity to nitrogen and phosphate of a Rhodopseudomonas palustris strain was studied through single element and orthogonal experiments.The results showed that KH2PO4 was a notable factor affecting the assimilative capacity of this bacterium to nitrogen and phosphate.In condition of same fermented biomass,the assimilation efficiency of R.palustris for nitrogen and phosphate could raise up to 48.02% and 7.76% instead of 32.51% and 5.98% respectively,when the content of NH4Cl was 0.05 g/L,KH2PO4 was 1.40 g/L and yeast extracts was 1.00 g/L.