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变质梯度凝电泳方法用于微生物转移分析在热友和半友的无氧消化过程中
Pramod Pandey1, Dhrubajyoti Chowdhury1,2, Yi Wang1
1Department of Population Health and Reproduction, University of California-Davis, Davis, CA 95616, USA.
Gels (Basel, Switzerland)
|May 24, 2024
概括
这项研究使用了变质渐变凝电泳 (DGGE) 来追踪无氧消化过程中细菌社区在便中的转移. 温度显著改变了微生物组成,影响了温室气体排放.
科学领域:
- 环境微生物学 环境微生物学
- 厌氧消化 厌氧消化
- 分子生态学分子生态学
背景情况:
- 乳制品便是温室气体 (GHG) 的重要来源,主要是甲.
- 肥料的温室气体排放是生物驱动的,受到微生物群落和环境条件的影响.
- 了解无氧过程中的微生物转移对于开发缓解策略至关重要.
研究的目的:
- 为了研究在无氧消化下在便中微生物群落的演变.
- 分析微生物的变化,以应对不同的温度条件 (美索菲尔和热爱的).
- 为了将微生物群落的变化与对温室气体排放的潜在影响相关联.
主要方法:
- 实验室规模的无氧消化反应堆在28°C,36°C,44°C和52°C的温度下运行.
- 细菌群体结构使用变性渐变凝电泳 (DGGE) 分析,针对16S rRNA基因的V3区域.
- 采用PCR放大和DGGE分离,以指纹和比较随时间推移的细菌群体.
主要成果:
- 细菌群体的组成受到温度和化时间的重大影响.
- 最初的微生物群落 (第0天) 主要是由*Acinetobacter* sp. 在所有温度下.
- 在较晚的阶段 (第7至60天),出现了不同的微生物群落,热友性条件有利于像*Coprothermobacter proteolyticus*和*Tepidimicrobium ferriphilum*这样的细菌.
结论:
- 温度是推动微生物社区结构在便无氧消化中的关键因素.
- DGGE的分析有效地说明了微生物的转移,突出了这种技术的潜力,结合测序来研究无氧过程.
- 需要进一步的研究来将特定的微生物群落动态与便的温室气体排放率联系起来.
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