科微学术

微生物学通报

水稻土中脂肪酸互营氧化的研究进展
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家杰出青年基金项目(No. 40625003)


A review of syntrophic fatty acids oxidation in anoxic paddy soil
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    水稻田是温室气体甲烷(CH4)的重要释放源之一, 有机质在水稻土中通过厌氧分解途径最终产生CH4和CO2。短链脂肪酸互营氧化是水稻土有机质降解的关键环节, 但是由于互营微生物独特的生理生态特性, 目前人们对于参与该过程的微生物群落及功能了解甚少。稳定同位素探针(SIP)技术被认为是实现环境中参与物质转化微生物种类与功能相耦合的有力工具。本文首先讨论互营过程的热力学基础和互营微生物的种间相互作用模式, 然后简要讨论了互营过程的环境影响因子, 最后详细综述稳定同位素探针技术在水稻土短链脂肪酸互营氧化过程中的相关研究。目前的研究表明: 参与水稻土脂肪酸互营氧化过程的互营细菌种类丰富、多样性高; 除已知互营细菌的作用外, 大量未培养、功能未知的细菌类型也可能参与短链脂肪酸的互营氧化; 对于互营细菌的伙伴而言, 新型产甲烷胞菌属(Methanocella)类型的古菌在不同脂肪酸互营降解过程中均起主要作用, 揭示了这类产甲烷古菌在水稻土厌氧产甲烷过程中的重要作用。

    Abstract:

    Flooded rice field is one of major biogenic sources of greenhouse gas CH4. Complex organic matter is degraded to CH4 and CO2 by the co-operation of anaerobic microorganisms of several metabolic guilds involving the syntrophic oxidation of short-chain fatty acids like propionate, butyrate and acetate. Due to the fastidious nature of cultivation, the diversity and ecology of microorganisms involved in syntrophic oxidation in natural environments like paddy soils remain largely unexplored. Stable isotope probing (SIP), which links microbial identity and function, is a powerful tool to investigate the syntrophic oxidation of fatty acids in flooded paddy soils. This article reviews the recent research progresses in the thermodynamic principles, the interspecies interactions in the syntrophic oxidation of fatty acids, and paddy soils employing SIP technology. The knowledge acquired suggests that phylogenetically diverse bacterial groups are active in the syntrophic oxidation: except classic syntrophic bacteria, organisms belonging to uncultivated phylogenetic groups are also detected, which can serve as candidate syntrophs. Among archaea, Methanocella is the major methanogen partner in syntrophic oxidation of different fatty acids, indicating the importance of this group in CH4 production of paddy field soil.

    参考文献
    相似文献
    引证文献
引用本文

刘鹏飞,陆雅海. 水稻土中脂肪酸互营氧化的研究进展[J]. 微生物学通报, 2013, 40(1): 109-122

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2013-01-21
  • 出版日期: