海洋氨氧化古生物和细菌占据了不同的铁和铜
Roxana T Shafiee1, Poppy J Diver2, Joseph T Snow2
1Department of Earth Sciences, University of Oxford, Oxfordshire, UK. roxana.shafiee@earth.ox.ac.uk.
ISME communications
|November 8, 2023
概括
海洋古生物和细菌 (AOA和AOB) 推动海洋化. 铁和铜的相反生理学解释了它们独特的海洋,AOA喜欢富含铜的水域,AOB喜欢富含铁的环境.
科学领域:
- 海洋微生物学 海洋微生物学
- 生物地质化学生物地质化学
- 微金属相互作用 微金属相互作用
背景情况:
- 通过古生物 (AOA) 和细菌 (AOB) 的氨氧化启动了海洋化.
- AOA具有比AOB更高的氨基亲和力,使AOB在寡质海洋中的持久性变得神秘.
研究的目的:
- 研究海洋AOA和AOB对铁 (Fe) 和铜 (Cu) 的反应中的对比生理.
- 根据微量金属相互作用,阐明海洋环境中AOA和AOB的利基分离机制.
主要方法:
- 对海洋AOA (Nitrosopumilus maritimus SCM1) 和AOB (Nitrosococcus oceani C-107) 的生理学进行比较分析.
- 对不同度的未化铁和铜的研究反应.
- 进行比较基因组学,预测各种海洋AOA和AOB的广泛机制.
主要成果:
- AOB对铁的亲和力更强,这可能使他们能够占据较浅,富含氨的水域,与高Fe竞争.
- AOA对铜的亲和力和耐受性更高,这解释了它们在变量Cu海洋环境中的成功.
- 基因组分析表明,这些金属驱动的生理差异在海洋氨氧化剂中很常见.
结论:
- 微金属的可用性,特别是铜,可能会限制公海中的氨氧化.
- 对铁和铜的相反亲和力为海洋AOA和AOB之间的利基区分提供了基础.
- 在地球历史上,AOB可能比AOA更早地出现,考虑到微量金属的可用性不断变化.
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