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由慢性塑料废物影响的红树林沉积物微生物群对二二乙基甲酸盐的生物降解

Kanphorn Saeng-Kla¹, Wuttichai Mhuantong², Teerasit Termsaithong^3,4

¹Department of Biology, Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.

Marine biotechnology (New York, N.Y.)

|December 3, 2024

概括

红树林沉积物微生物有效地降解二2-乙基) 甲酸盐 (DEHP),这是一个常见的塑料污染物. 这项研究确定了涉及DEHP清除的关键细菌群和途径,为沿海生态系统的塑料污染提供了解决方案.

科学领域:

环境微生物学环境微生物学
生物修复是一种生物修复.
海洋污染海洋污染

背景情况:

塑料污染,特别是来自塑化剂,如二-2-乙基) 甲酸盐 (DEHP),对红树林生态系统构成重大威胁.
红树林沉积物长期暴露在塑料污染物中,可能会选择具有降解能力的微生物群落.

研究的目的:

评估土著红树林沉积物微生物组的DEHP去除效率.
确定关键的微生物参与者和代谢途径,负责这些环境中的DEHP降解.

主要方法:

微观宇宙实验是使用长期受到塑料污染的红树林沉积物建立的.
甲基因组分析和PICRUSt2被用来识别降解DEHP的细菌,并预测代谢途径.
有效的DEHP降解细菌菌株的隔离和表征.

主要成果:

本地红树林沉积物微生物组在35天内实现了200mg/kgDEHP的99%降解.
Myxococcales,Methyloligellaceae,Mycobacterium和Micromonospora被确定为潜在的关键DEHP降解物.
确定了涉及catechol代谢 (catC,pcaD,pcaI,pcaF,fadA) 的预测无氧途径.
细菌分离物,Gordonia sp. 这种细菌. 和Gordonia polyisoprenivorans,在7天内降解了65-97%的DEHP,并可以降解其他甲酸 (PAE).

结论:

红树林沉积物微生物组具有高度的DEHP降解能力,由特定的微生物群体和代谢途径驱动.
戈多尼亚种类在受污染的红树林生态系统中显示出DEHP和其他PAE生物修复的巨大潜力.
这项研究提供了关于微生物解决方案的见解,以减轻沿海环境中的塑料污染.

关键词:

在DEHP中,DEHP是DEHP.降解降解是一种降解.红树林沉积物的沉积物转基因组学是指转基因组学.在PAE中,PAE是PAE.塑料污染问题塑料污染问题

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