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首页> 外文期刊>Environmental toxicology and chemistry >REMOVAL OF CADMIUM IONS DURING STATIONARY GROWTH PHASE BY AN EXTREMELY CADMIUM-RESISTANT STRAIN OF STENOTROPHOMONAS SP.
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REMOVAL OF CADMIUM IONS DURING STATIONARY GROWTH PHASE BY AN EXTREMELY CADMIUM-RESISTANT STRAIN OF STENOTROPHOMONAS SP.

机译：极度耐盐单胞菌SP的耐镉菌株在固定生长阶段去除镉离子。

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摘要

Stenotrophomonas sp. CD02 was isolated from a site that previously had been contaminated with high concentrations of the heavy metals cadmium (3 mg kg~(-1)) and chromium (115 mg kg~(-1)). This strain was able to grow on complex (Luria Bertani) medium containing high concentrations of cadmium ion (up to 4 mM). Additionally, it could remove up to 80% of the dissolved ions but only after reaching stationary growth phase. Strain CD02 also tolerated high concentrations of other heavy metals such as chromium, zinc, copper, nickel, and lead at levels more than 2 mM. Although strain CD02 can tolerate much higher cadmium concentrations than the three Stenotrophomonas maltophilia strains tested, they all possess resistance to the same range of antibiotics. This suggests that strain CD02 possesses a mechanism that allows it to tolerate and remove cadmium differently from those conferring resistance to antibiotics. Strain CD02 can be a suitable candidate for heavy metal bioremediation in contaminated environment because it is able to tolerate high concentration of heavy metals and remove cadmium aerobically.
机译：嗜麦芽单胞菌从先前已被高浓度重金属镉（3 mg kg〜（-1））和铬（115 mg kg〜（-1））污染的地点分离出CD02。该菌株能够在含有高浓度镉离子（最高4 mM）的复杂（Luria Bertani）培养基上生长。此外，它可以去除高达80％的溶解离子，但仅在达到固定生长阶段后才能去除。 CD02菌株还耐受高浓度的其他重金属，例如铬，锌，铜，镍和铅，其浓度超过2 mM。尽管CD02菌株比三株嗜麦芽窄食单胞菌可耐受的镉浓度高得多，但它们都对相同范围的抗生素具有抗性。这表明CD02菌株具有一种机制，使其可以耐受和去除镉，而对镉具有抗药性。 CD02菌株可以在受污染的环境中进行重金属生物修复，因为它能够耐受高浓度的重金属并有氧去除镉。

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