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一种丰富的细菌系,在寡质海洋沉积物中具有酸盐氧化潜力

Rui Zhao¹, Steffen L Jørgensen², Andrew R Babbin³

¹Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA. rzh041@mit.edu.

Communications biology

|April 11, 2024

概括

一个新发现的细菌系,Candidatus Nitrosediminicolota,作为酸盐氧化细菌 (NOB) 起作用. 它们的广泛存在有助于解释海洋沉积物中氨氧化古生物和NOB之间的不平衡.

科学领域:

微生物学微生物学
环境科学环境科学
海洋生态海洋生态学

背景情况:

酸盐氧化细菌 (NOB) 对于化至关重要,调节生态系统中酸盐的可用性和损失.
在海洋沉积物中观察到的氨氧化古生物 (AOA) 与NOB的丰度比率超过了理论预测,表明尚未发现的NOB种群.

研究的目的:

确定导致海洋沉积物中观察到的丰度差异的新型酸盐氧化细菌.
描述新发现的细菌群体的功能潜力和分布.

主要方法:

海洋沉积物样本的元基因组学分析.
新型细菌种群的生物信息识别和遗传学定位.
功能性基因分析以推断代谢能力.

主要成果:

发现了细菌系Candidatus Nitrosediminicolota,这种细菌在全球的寡质树脂沉积物中非常丰富.
在Ca.中证明酸盐氧化潜力. 尼二甲基微小,除了尿素水解和硫酸硫酸盐还原.
两种物种的鉴定,Ca. 尼特洛西迪米尼科拉飞 (氧) 和Ca. 尼特洛西迪米尼科拉无氧耐受剂 (有氧和无氧).

结论:

酸盐氧化剂 (Candidatus Nitrosediminicolota) 是一个重要的,以前未被认可的酸盐氧化剂组.
这种类型的含有解决了氧化海洋沉积物中AOA和正规NOB之间的丰度不平衡.
卡的活性. 卡的活性. 尼特洛西迪米尼科洛塔可能对海洋酸盐预算有很大的控制权.

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