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耐受高浓度铯离子细菌的研究进展
张飞1,2,3,郭亚平1,4,陈珊1,3,孙元敏1,2,3,汤坤贤1,2,3
1.自然资源部第三海洋研究所,福建 厦门 361005;2.福建省海洋生态保护与修复重点实验室,福建 厦门 361005;3.自然资源部海洋生态保护与修复重点实验室 福建 厦门 361005;4.南京大学 地理与海洋科学学院,江苏 南京 210023
摘要:
浓度高于毫摩尔级的铯离子即可对一般的微生物产生毒害作用。迄今为止,研究发现多株可以耐受铯离子的细菌,一些细菌耐受铯离子的浓度甚至超过200毫摩尔,这对于揭示细菌耐受铯离子机制,开展微生物修复铯污染环境具有重要意义。本文系统总结在筛选耐受铯离子细菌方面的研究进展,探讨这些菌株耐受高浓度铯离子的分子机制,展望利用微生物进行铯污染环境修复的前景,以期为探索放射性铯污染环境的微生物生态修复提供参考。
关键词:  细菌  铯离子  钾离子  生物修复  耐受性
DOI:10.14188/j.ajsh.2023.04.002
分类号:P735
基金项目:自然资源部第三海洋研究所基本科研业务费资助项目(海三科2020013、海三科2018007);厦门海洋研究开发院共建资助项目(K200701)
Research progress on bacteria tolerant to high concentrations of cesium ions
ZHANG Fei1,2,3, GUO Yaping1,4, CHEN Shan1,3, SUN Yuanmin1,2,3, TANG Kunxian1,2,3
1.Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, Fujian, China;2.Fujian Provincial Key Laboratory of Marine Ecological Conservation and Restoration, Xiamen 361005, Fujian, China;3.Key Laboratory of Marine Ecological Conservation and Restoration, Ministry of Natural Resources, Xiamen 361005, Fujian, China;4.School of Geography and Oceanography, Nanjing University, Nanjing 210023, Jiangsu, China
Abstract:
Cesium ions with concentrations higher than millimolar level can have toxic effects on general microorganisms. Currently, several bacteria that can tolerate cesium ions have been screened, and some strains are capable of tolerating cesium ions at concentrations even higher than 200 millimoles, which is important for revealing the mechanism of bacterial tolerance to cesium ions and carrying out microbial remediation of cesium-contaminated environments. In this paper, we summarize the progress in screening bacteria tolerant to cesium ions systematically, discuss the possible molecular mechanisms, and offer advices to the prospects of using microorganisms for bioremediation of cesium-contaminated environments, in the hope of providing a reference for exploring microbial ecological remediation of radioactive cesium-contaminated environments.
Key words:  bacterium  cesium ion  potassium ion  bioremediation  tolerance