Possible Missing Sources of Atmospheric Glyoxal Part I: Phospholipid Oxidation from Marine Algae.

IF 3.4 3区生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Metabolites Pub Date : 2024-11-19 DOI:10.3390/metabo14110639

Renee T Williams, Annika Caspers-Brown, Camille M Sultana, Christopher Lee, Jessica L Axson, Francesca Malfatti, Yanyan Zhou, Kathryn A Moore, Natalie Stevens, Mitchell V Santander, Farooq Azam, Kimberly A Prather, Robert S Pomeroy

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Abstract

Background: Glyoxal has been implicated as a significant contributor to the formation of secondary organic aerosols, which play a key role in our ability to estimate the impact of aerosols on climate. Elevated concentrations of glyoxal over remote ocean waters suggests that there is an additional source, distinct from urban and forest environments, which has yet to be identified. Herein, we demonstrate that the ocean can serve as an appreciable source of glyoxal in the atmosphere due to microbiological activity.

Methods and results: Based on mass spectrometric analyses of nascent sea spray aerosols and the sea surface microlayer (SSML) of naturally occurring algal blooms, we provide evidence that during the algae death phase phospholipids become enriched in the SSML and undergo autoxidation thereby generating glyoxal as a degradation product.

Conclusions: We propose that the death phase of an algal bloom could serve as an important and currently missing source of glyoxal in the atmosphere.

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大气中可能缺失的乙二醛来源 I 部分：海洋藻类的磷脂氧化作用。

背景：乙二醛被认为是二次有机气溶胶形成的一个重要因素，而二次有机气溶胶在我们估计气溶胶对气候影响的能力中起着关键作用。偏远海域乙二醛浓度的升高表明，还有一个不同于城市和森林环境的来源尚未确定。在本文中，我们证明了由于微生物活动，海洋可以成为大气中乙二醛的一个重要来源：根据对新生海雾气溶胶和自然发生的藻类水华的海面微层（SSML）进行的质谱分析，我们提供的证据表明，在藻类死亡阶段，磷脂在 SSML 中富集并发生自氧化，从而产生乙二醛作为降解产物：我们认为，藻华的死亡阶段可以成为大气中乙二醛的一个重要来源，而这一来源目前还没有被发现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metabolites Biochemistry, Genetics and Molecular Biology-Molecular Biology

CiteScore

5.70

自引率

7.30%

发文量

1070

审稿时长

17.17 days

期刊介绍： Metabolites (ISSN 2218-1989) is an international, peer-reviewed open access journal of metabolism and metabolomics. Metabolites publishes original research articles and review articles in all molecular aspects of metabolism relevant to the fields of metabolomics, metabolic biochemistry, computational and systems biology, biotechnology and medicine, with a particular focus on the biological roles of metabolites and small molecule biomarkers. Metabolites encourages scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on article length. Sufficient experimental details must be provided to enable the results to be accurately reproduced. Electronic material representing additional figures, materials and methods explanation, or supporting results and evidence can be submitted with the main manuscript as supplementary material.