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Growth of marine bacteria and ammonium regeneration from substrates in different C:N ratios 被引量:2
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作者 wang jiangtao yin xiaonan 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2009年第3期59-64,共6页
Natural assemblages of marine bacteria were chosen in a batch culture experiments. The impact of varying nitrogen substrate concentrations and the substrate C:N ratios (C:Ns) on the bacterial C:N ratio (C:NB),... Natural assemblages of marine bacteria were chosen in a batch culture experiments. The impact of varying nitrogen substrate concentrations and the substrate C:N ratios (C:Ns) on the bacterial C:N ratio (C:NB), the bacterial growth efficiency (BGE) and ammonium regeneration was mainly examined. The C:Ns ratios varied from 5:1 (carbon limitation) to 40:1 (nitrogen limitation) with varying combinations of glucose and NO3. The C:NB ratio had positive relationship with the C:Ns ratio (r=0.93, n=8), whose value was 3.77 when the C:Ns ratio was 5:1 but increased to 6.47 when the C:Ns ratio was 40:1. These results indicate that the C:NB ratio is a potential diagnostic tool for determining the bacterial growth in natural waters controlled by either, carbon or nitrogen. BGE decreased with the declining nitrate concentration and negatively related to C:N8 (r=-0.51, n=8). The average value of BGE was 0.20. This value was a little lower than other reports, which could be induced by the nitrogen source used in our experiments. Finally, regeneration time of ammonium delayed with the increasing C:Ns ratio, which indicates that there were different metabolism mechanisms when bacterial growth was limited by carbon source and nitrogen source. 展开更多
关键词 marine bacteria C:N bacteria growth efficiency AMMONIUM
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