功能性基因和转录表明,在一个城市化湾的红树林潮间沉积物中存在和活跃的微生物甲基化社区
Guofang Feng1,2, Sanqiang Gong3
1School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
Microorganisms
|June 27, 2024
概括
在红树林沉积物中的甲基 (MeHg) 积累是由微生物 (Hg) 甲基化驱动的. 这项研究确定了关键的微生物群落,并发现MeHg水平,而不是总Hg,显著影响深湾的Hg甲基化微生物.
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
- 海洋科学 海洋科学
背景情况:
- 红树林沉积物中的 (Hg) 甲基化导致神经毒性甲基 (MeHg) 的积累.
- 在这些环境中负责Hg甲基化的微生物群落尚不清楚.
- 甲基转移酶基因hgcA为研究Hg甲基化微生物提供了直接的分子标记物.
研究的目的:
- 研究深湾的红树林潮间沉积物中hgcA基因和转录的多样性和丰富性.
- 为了将微生物Hg甲基化潜力与和甲基的度相关联.
- 在这个城市化红树林生态系统中,确定参与甲基化的主要微生物种群.
主要方法:
- 环境DNA和RNA测序针对hgcA基因.
- 在沉积物样本中量化总 (Hg) 和甲基 (MeHg).
- 生物信息分析以确定含有hgcA的微生物群落的多样性和丰富性.
- 微生物群落结构与物种之间的统计相关性分析.
主要成果:
- 携带hgcA的微生物群落主要由Thermodesulfobacteria和Euryarchaeota系主导.
- 在所有采样地点,hgcA基因的丰富性和多样性都超过了转录水平.
- 甲基 (MeHg) 含量,而不是总 (Hg),与活性Hg甲基化社区的结构和丰度有显著的相关性.
结论:
- 与 Thermodesulfobacteria 和 Euryarchaeota 相关的微生物群落是深湾红树林沉积物中甲基化的主要驱动因素.
- 甲基度在塑造微生物Hg甲基化格局方面比总更为重要.
- 了解这些微生物驱动因素对于预测和减轻沿海生态系统中的甲基生物转化至关重要.
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