Bacterial regeneration of ammonium and phosphate as affected by the carbon:nitrogen:phosphorus ratio of organic substrates
Bacterial regeneration of ammonium and phosphate as affected by the carbon:nitrogen:phosphorus ratio of organic substrates
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DOI：
10.1007/bf02017167
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发表时间：
1990-05
影响因子：
3.6
通讯作者：
Y. Tezuka
中科院分区：
文献类型：
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作者：
Y. Tezuka
通过在添加简单有机C、N、P源（分别为葡萄糖、天冬酰胺和甘油磷酸钠）的矿物培养基中培养淡水细菌，研究有机基质碳∶氮∶磷（C∶N∶P）比对铵、磷再生的影响，得到25种不同基质C∶N∶P比。当有机基质的C∶N和N∶P原子比分别≤10∶1和≤16∶1时，铵盐和磷酸盐均可再生。当C∶N和N∶P比值分别≤10∶1和≥10 - 20∶1时，只有铵离子再生。另一方面，当C∶N和N∶P的比值分别为≥15∶1和≥5∶1时，铵盐和磷酸盐均不再生。在任何情况下都不能单独再生磷酸盐。由于细菌能够广泛改变其生物量的C∶N∶P比，因此细菌的生长产量主要取决于底物碳浓度，而与底物C∶N∶P比的广泛变化无关。
The effect of carbon∶nitrogen∶phosphorus (C∶N∶P) ratio of organic substrates on the regeneration of ammonium and phosphate was investigated by growing natural assemblages of freshwater bacteria in mineral media supplemented with the simple organic C, N, and P sources (glucose, asparagine, and sodium glycerophosphate, respectively) to give 25 different substrate C∶N∶P ratios. Both ammonium and phosphate were regenerated when C∶N and N∶P atomic ratios of organic substrates were ≤10∶1 and ≤16∶1, respectively. Only ammonium was regenerated when C∶N and N∶P ratios were ≤10∶1 and ≥10–20∶1, respectively. On the other hand, neither ammonium nor phosphate was regenerated when C∶N and N∶P ratios were ≥15∶1 and ≥5∶1, respectively. In no case was phosphate alone regenerated. As bacteria were able to alter widely the C∶N∶P ratio of their biomass, the growth yield of bacteria appeared primarily dependent on the substrate carbon concentration, irrespective of a wide variation in the substrate C∶N∶P ratio.