铁氧化细菌与湿地植物根部的氢氧化铁沉淀（铁斑）有关。
Iron-oxidizing bacteria are associated with ferric hydroxide precipitates (Fe-plaque) on the roots of wetland plants.
作者信息
Emerson D, Weiss JV, Megonigal JP
机构信息
American Type Culture Collection, Manassas, Virginia.
出版信息
Appl Environ Microbiol. 1999 Jun;65(6):2758-61. doi: 10.1128/AEM.65.6.2758-2761.1999.
Abstract
The presence of Fe-oxidizing bacteria in the rhizosphere of four different species of wetland plants was investigated in a diverse wetland environment that had Fe(II) concentrations ranging from tens to hundreds of micromoles per liter and a pH range of 3.5 to 6.8. Enrichments for neutrophilic, putatively lithotrophic Fe-oxidizing bacteria were successful on roots from all four species; acidophilic Fe-oxidizing bacteria were enriched only on roots from plants whose root systems were exposed to soil solutions with a pH of <4. In Sagittaria australis there was a positive correlation (P < 0.01) between cell numbers and the total amount of Fe present; the same correlation was not found for Leersia oryzoides. These results present the first evidence for culturable Fe-oxidizing bacteria associated with Fe-plaque in the rhizosphere.
摘要
在一个多样的湿地环境中，对四种不同湿地植物根际中存在的铁氧化细菌进行了研究。该湿地环境中铁（II）浓度范围为每升数十至数百微摩尔，pH值范围为3.5至6.8。对嗜中性、可能为化能无机营养型的铁氧化细菌的富集在所有四种植物的根上均获成功；嗜酸铁氧化细菌仅在根系暴露于pH值小于4的土壤溶液中的植物根上得到富集。在矮慈姑中，细胞数量与铁的总量之间存在正相关（P < 0.01）；而在李氏禾中未发现相同的相关性。这些结果首次证明了根际中与铁斑块相关的可培养铁氧化细菌的存在。
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