在被长链石油碳化合物污染的含水层中识别碳固化微生物和碳固化途径
Shuang Gan1,2,3, Zhuo Ning1,3, Shuaiwei Wang1,3
1Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, China.
概括
能够降解石油碳化合物的碳固化微生物在长链PHC污染的含水层中被发现. 这些微生物,包括Flavobacterium和Pseudomonas,利用像rTCA这样的途径,可能由碳化合物刺激.
科学领域:
- 环境微生物学环境微生物学
- 生物地质化学生物地质化学
- 石油地质化学 石油地质化学
背景情况:
- 含水层中的石油碳化合物 (PHC) 通常被视为碳源,原因是生物降解成CO2.
- 虽然在PHC受污染的地点已知微生物的碳固定,但研究往往忽视了长链PHC.
- 了解这些研究不足的环境中的碳固定对于生物修复和碳循环至关重要.
研究的目的:
- 识别和描述长链PHC污染水层中的碳固定微生物.
- 为了阐明在这种环境中存在的主导碳固定路径.
- 研究长链PHC与微生物碳固定能力之间的关系.
主要方法:
- 对受污染的含水层进行水化分析.
- 超基因组测序来分析微生物社区的结构和功能.
- 生物信息分析以确定碳固定基因和途径.
主要成果:
- 确定了多种碳固定微生物,包括Flavobacterium和Pseudomonas.
- 基基酸/基酸 (HP/4HB),还原性三碳酸 (rTCA) 和脱碳化4-基酸 (DC/4HB) 循环是碳固定的主要途径.
- 长链PHC与碳固定微生物的相关性较弱,但可能刺激特定群体的生长,特别是参与rTCA循环的群体.
结论:
- 拥有碳固定基因的微生物存在于被长链石油碳化合物污染的含水层中.
- 微生物的石油降解能力与碳固定能力有关.
- 长链石油碳化合物可能会在污染的含水层中起到刺激作用,促进碳固定微生物的生长.
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