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首页> 外文期刊>Environmental toxicology and chemistry >TELLURITE RESISTANCE AND REDUCTION BY A PAENIBACILLUS SP. ISOLATED FROM HEAVY METAL-CONTAMINATED SEDIMENT
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TELLURITE RESISTANCE AND REDUCTION BY A PAENIBACILLUS SP. ISOLATED FROM HEAVY METAL-CONTAMINATED SEDIMENT

机译：PAENIBACILLUS SP的亚硫酸盐抗性和还原性。与重金属污染的沉积物隔离

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摘要

A gram-positive bacterium (designated as strain TeW) that is highly resistant to tellurite was isolated from sediment. The bacterium can grow in the presence of up to 2,000 μmol/L of potassium tellurite (K_2TeO_3). Reduction of K_2TeO_3 to tellurium was indicated by the blackening of the growth medium. No lag in growth was observed when cells unexposed to tellurite were transferred to the growth medium containing K_2TeO_3, indicating that resistance to tellurite was not inducible. Up to 50 and 90% of the metalloid oxyanion tellurite (TeO_3~(2-)) was removed from the medium by strain TeW during growth in nonstatic (shaking) and static (without shaking) conditions, respectively. The bacterium was identified as a Paenibacillus sp. according to its morphology, physiology, and 16S rDNA sequence homology.
机译：从沉积物中分离出对亚碲酸盐具有高度抗性的革兰氏阳性细菌（称为TeW菌株）。该细菌可以在高达2,000μmol/ L的亚碲酸钾（K_2TeO_3）存在下生长。生长介质的变黑表明K_2TeO_3还原为碲。当未暴露于亚碲石的细胞转移到含有K_2TeO_3的生长培养基中时，未观察到生长的滞后，表明不可诱导对亚碲石的抗性。在非静态（摇动）和静态（无摇动）条件下生长时，通过应变TeW分别从培养基中去除了多达50％和90％的准金属氧阴离子亚碲酸盐（TeO_3〜（2-））。该细菌被鉴定为Paenibacillus sp.。根据其形态，生理学和16S rDNA序列同源性。

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