环境挥发可能是由硫代谢的乱交反应赋予的
Ying Liu1, Andreas Schäffer2, Mathieu Martinez3
1Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Hofackerstrasse 30, 4132, Muttenz, Switzerland; Institute for Environmental Research, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany.
Chemosphere
|October 27, 2023
概括
在低环境度下,微生物对 (Se) 的甲基化是随意发生的,而不是有意发生的. 这表明大气中的Se水平可能受到硫循环微生物的影响,而不仅仅是Se排毒.
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
- 的代谢过程 的代谢过程
背景情况:
- (Se) 缺乏影响全球数百万人,大气挥发可能限制其进入食物链.
- 在环境相关的纳米分子度下,关于Se挥发的系统数据很少.
- 了解微生物Se甲基化对于生物地化学循环和粮食安全至关重要.
研究的目的:
- 为了研究甲基化和挥发由*Pseudomonas tolaasii*在低,环境普遍度.
- 确定纳米分子水平上Se甲基化的机制,并将其与更高度进行比较.
- 评估这些发现对大气Se水平和潜在的补救策略的影响.
主要方法:
- 培养*Pseudomonas tolaasii*和使用不同度 (从纳米到微米) 的.
- 使用分析技术量化甲基化物种 (二甲基化,二甲基化,二甲基化,二甲基硫化,二基-3甲基) 的量化.
- 对甲基化与硫种的比率进行分析,以推断甲基化途径.
主要成果:
- 在纳米分子度下观察到高效的Se甲基化,加的Se和甲基化产品之间的线性相关性高达80nM.
- 甲基化效率与Se度线性增加,表明通过硫甲基化通路进行散乱甲基化.
- 甲基化和挥发的急剧增加发生在值度 (约. 640nM或50μg/L),表示酶诱导.
结论:
- *P. tolaasii*的低度Se甲基化可能是无序的,这意味着大气中的Se水平可能被硫循环微生物偶然控制.
- 高度实验室实验可能不能准确地反映自然的甲基化过程.
- 细菌甲基化被认为是对污染环境的补救策略.
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