Most probable number quantification of hypophosphite and phosphite oxidizing bacteria in natural aquatic and terrestrial environments
Most probable number quantification of hypophosphite and phosphite oxidizing bacteria in natural aquatic and terrestrial environments
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天然水生和陆地环境中次磷酸盐和亚磷酸盐氧化细菌的最可能数量定量
DOI：
10.1007/s00203-011-0775-9
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发表时间：
2012
影响因子：
2.8
通讯作者：
A. White
中科院分区：
文献类型：
--
作者：
B. L. Stone;A. White
使用最可能数法发现，冬季和夏季 12 个常见陆地和水生地点的沉积物和土壤中，次磷酸盐和亚磷酸盐氧化细菌的浓度相对于磷酸盐上生长的细菌浓度较高。可使用这些还原磷化合物作为唯一磷源的可培养细菌总浓度的百分比如下：次磷酸盐，7-100%；亚磷酸盐，10–67%；氨基乙基膦酸酯，34–270%。平均MPN/g（±SEM）如下：磷酸盐，6.19×106（±2.40×106）；次磷酸盐，2.61×106（±1.35×106） 亚磷酸盐，1.91×106（±1.02×106）；氨基乙基膦酸酯，3.90×106（±1.95×106）。在原始地点以及受到城市和农业干扰的地点都发现了相对较高浓度的还原磷氧化细菌。缺氧沉积物和土壤中还原磷氧化细菌的浓度相当。我们的数据表明，还原磷氧化细菌在环境中大量存在，为细菌磷氧化在自然界中的重要性提供了有力的证据。
Concentrations of hypophosphite and phosphite oxidizing bacteria were found to be high, relative to bacterial concentrations growing on phosphate, in sediment and soil during winter and summer seasons from 12 common terrestrial and aquatic sites using a most probable number method. The percent of total culturable bacterial concentrations that could use these reduced phosphorus compounds as a sole source of phosphorus were as follows: hypophosphite, 7–100%; phosphite, 10–67%; aminoethylphosphonate, 34–270%. The average MPN/g (±SEM) was as follows: phosphate, 6.19 × 106 (±2.40 × 106); hypophosphite, 2.61 × 106 (±1.35 × 106) phosphite, 1.91 × 106 (±1.02 × 106); aminoethylphosphonate, 3.90 × 106 (± 1.95 × 106). Relatively high concentrations of reduced phosphorus oxidizing bacteria were found in both pristine sites and sites with urban and agricultural disturbance. Concentrations of reduced phosphorus oxidizing bacteria in anoxic sediments and soil were equivalent. Our data indicate that reduced phosphorus oxidizing bacteria are abundant in the environment and provide strong evidence for the importance of bacterial P oxidation in nature.
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