State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
Bioresour Technol. 2019 Feb;273:185-195. doi: 10.1016/j.biortech.2018.11.022. Epub 2018 Nov 7.
A series of dominant functional floras involved in anaerobic digestion was obtained by subculturing anaerobic sludge with specific substrates, respectively, and their specific quorum sensing signals (AHLs) were identified. It was found that most of the AHLs were secreted in starvation of the functional floras. One or two AHLs were found to have a significant positive correlation with the behavior of hydrolytic-fermentative bacteria, homoacetogens, syntrophic propionate-oxidizing bacteria, syntrophic butyrate-oxidizing bacteria and aceticlastic methanogens, respectively. Hydrogenotrophic methanogens had a various self-organization means and broader relations with the other populations, which was induced by six AHLs at least. Performance of an upflow anaerobic sludge blanket in the startup process revealed that the dominant populations involved in anaerobic digestion would secret specific AHLs to induce K-strategy in resource-limited situation for reproduction and regulating their cooperation. This work presents a novel perspective on the social behaviors of microbial populations in anaerobic digestion.
通过用特定底物对厌氧污泥进行连续培养，获得了一系列参与厌氧消化的优势功能菌群，并且鉴定了它们特定的群体感应信号（AHLs）。研究发现，大多数 AHLs 在功能菌群的饥饿状态下分泌。发现一种或两种 AHLs 分别与水解发酵细菌、同型产乙酸菌、共乙酸氧化菌、共丁酸氧化菌和乙酸营养型甲烷菌的行为有显著的正相关关系。产氢甲烷菌有各种自我组织的手段，并与其他种群有更广泛的关系，至少有六种 AHLs 可以诱导这种关系。上流式厌氧污泥床在启动过程中的性能表明，参与厌氧消化的优势种群会分泌特定的 AHLs，以在资源有限的情况下诱导 K 策略进行繁殖，并调节它们的合作。这项工作为厌氧消化中微生物种群的社会行为提供了一个新的视角。
