在环境和工程污泥样本中量化减少硫酸盐细菌的比较方法
Aracely Zambrano-Romero1, Dario X Ramirez-Villacis1,2,3, Noelia Barriga-Medina2,3
1Instituto de Microbiología, Universidad San Francisco de Quito USFQ, Campus Cumbayá, Diego de Robles y Vía Interoceánica, Quito 17-1200-841, Ecuador.
Biology
|July 29, 2023
概括
本研究提出了一种优化的定量PCR (qPCR) 方法,用于精确计数污泥中的硫酸盐降解细菌 (SRB). 使用dsrA基因拷贝的验证的qPCR方法为环境和工程样本提供了灵敏和精确的工具.
科学领域:
- 环境微生物学环境微生物学
- 分子生物学分子生物学
- 生物技术是生物技术.
背景情况:
- 减少硫酸盐的细菌 (SRB) 在生物地化学循环中起着关键作用,可以影响工程系统.
- 精确列举SRB对于理解它们的生态功能和管理污泥过程至关重要.
- 现有的显微镜和培养等方法在精度和范围上都有局限性.
研究的目的:
- 为了比较和优化方法量化硫酸盐降解细菌 (SRB) 在环境和工程污泥.
- 为了评估定量PCR (qPCR) 针对dsrA基因进行SRB计数的疗效.
- 为绝对SRB量化开发一个经过验证和敏感的分子工具.
主要方法:
- 测试了四套用于dsrA和apsA基因放大的原始组.
- 使用SRB基因组DNA和丰富污泥开发了qPCR标准曲线.
- 优化了使用dsrA基因拷贝正常化到合成DNA校准器的qPCR方法.
主要成果:
- DSR1F/RH3-dsr-R初始集显示了dsrA放大效果的前景,但存在不一致性.
- 使用dsrA基因拷贝作为校准器的优化qPCR方法证明了特异性,准确性和精度.
- 基于培养的方法与dsrA基因拷贝相关,但在编目方面有所不同.
- 微观计数面临的局限性与密集集群的SRB.
结论:
- 一种对dsrA基因拷贝进行规范化的qPCR方法是绝对SRB计数的敏感和可靠工具.
- 这种分子方法克服了传统显微镜和基于培养的方法的局限性.
- 经过验证的qPCR方法适用于分析各种污泥环境中的SRB种群.
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