生态环境学报 ›› 2021, Vol. 30 ›› Issue (11): 2257-2266.DOI: 10.16258/j.cnki.1674-5906.2021.11.017

• 综述 • 上一篇    下一篇

金属依赖型厌氧甲烷氧化研究进展

李侠1(), 兰建英2,3, 蒋海明2,3,*()   

  1. 1.内蒙古科技大学矿业研究院,内蒙古 包头 0140101
    2.内蒙古科技大学生命科学与技术学院,内蒙古 包头 014010
    3.内蒙古自治区生物质能源化利用重点实验室,内蒙古 包头014010
  • 收稿日期:2021-01-10 出版日期:2021-11-18 发布日期:2021-12-29
  • 通讯作者: * 蒋海明(1977年生),男,教授,主要研究方向为应用环境微生物、生物能源、环境污染物的生物治理及监测。E-mail: jhmhn@163.com
  • 作者简介:李侠(1979年生),女(满族),副教授,研究方向为环境微生物与微生物冶金。E-mail: lixia2002hn@163.com
  • 基金资助:
    国家自然科学基金项目(31560015);国家自然科学基金项目(31860011);国家自然科学基金项目(51864037);内蒙古自然科学基金项目(2016MS0512);内蒙古自然科学基金项目(2018LH03024);内蒙古自治区高等学校科学技术研究项目(NJZY16155);内蒙古科技大学创新基金项目(2016XYPYL03)

Advance in Metal Iron-dependent Anaerobic Oxidation of Methane

LI Xia1(), LAN Jianying2,3, JIANG Haiming2,3,*()   

  1. 1. Research Institute of Mining, Inner Mongolia University of Science and Technology, Baotou 014010, China
    2. School of Life Science and Technology, Inner Mongolia University of Science and Technology, Baotou 014010, China
    3. Inner Mongolia Key Laboratory of Biomass-Energy Conversion, Baotou 014010, China
  • Received:2021-01-10 Online:2021-11-18 Published:2021-12-29

摘要:

甲烷(CH4)是一种温室气体,其温室效应是二氧化碳的26倍。减少甲烷排放,可以缓解温室效应,有助于保护大气环境。微生物介导的甲烷厌氧氧化是调节甲烷向大气排放的关键过程。金属氧化物或金属离子可以作为甲烷厌氧氧化的电子受体,且金属依赖的甲烷厌氧氧化是减小全球甲烷排放的一个重要途径。虽然研究表明金属依赖型厌氧甲烷营养古菌可以促进这一过程,但其菌种、代谢途径及胞外电子传递途径尚缺乏深入研究。文章从金属依赖型厌氧甲烷氧化菌、金属依赖型厌氧甲烷氧化机制及金属依赖型厌氧甲烷氧化菌胞外电子传递机制等方面对金属依赖型厌氧甲烷氧化研究现状进行了概述,分析了金属依赖型厌氧甲烷氧化研究存在的问题,并讨论了其今后的研究方向,为金属依赖型厌氧甲烷氧化研究提供参考。

关键词: 甲烷, 碳循环, 厌氧甲烷氧化, 金属依赖型厌氧甲烷营养古菌, 铁(锰)氧化物, 胞外电子传递机制

Abstract:

Methane is a kind of greenhouse gas, and its greenhouse effect is 26 times of that of carbon dioxide. Reducing emissions of methane to the atmosphere will help to ease the greenhouse effect and protect the atmospheric environment. Anaerobic oxidation of methane (AOM) process mediated by microbe is the key to adjust the methane emissions into the atmosphere. Metal oxide or metal ions can be used as the extracellular electron acceptor in the process of AOM. Metal-dependent AOM is an important way to reduce global methane emissions. Although previous studies have shown that metal-dependent anaerobic methanotrophic archaea (M-ANME) could facilitate the process, there is still lack of an in-depth study on the microbes which can anaerobically oxidize methane mediated by metal oxide or/and metal ions, along with the metabolic pathways and extracellular electron transport pathway. In this review, the M-ANME, mechanism of metal-dependent AOM, and mechanism for extracellular electron transfer of metal-dependent anaerobic methane oxidation were summarized firstly. Then, the key issues in the study of metal ion-dependent AOM were analyzed. After that, the future research directions were discussed to provide reference for the study of metal ion-dependent AOM.

Key words: methane, carbon cycle, anaerobic oxidation of methane, iron/manganese oxides, metal-dependent anaerobic methanotrophic archaea, mechanism of extracellular electron transfer

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