常见人工甜味剂在环境相关度下对土壤春尾及其肠道微生物群的影响
Xiang-Long Lin1, Fei Guo2, Matthias C Rillig3
1State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Environment international
|February 15, 2024
概括
人工甜味剂 (AS) 对土壤无脊椎动物构成生态风险. 研究表明,AS影响尾繁殖和肠道微生物,其影响在几代人之间发生变化,凸显了环境污染问题.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 微生物学 微生物学
背景情况:
- 人工甜味剂 (AS) 是常见的糖替代品和新兴的环境污染物.
- 之前的研究重点是水生生态系统中的AS影响,不知土壤无脊椎动物的影响.
- 了解AS对土壤生物及其肠道微生物群的影响对于生态风险评估至关重要.
研究的目的:
- 研究四种常见的AS (糖,糖,环酸盐,乙硫) 对土壤无脊椎动物 (Folsomia candida) 和它们的肠道微生物群落的影响.
- 评估环境相关的AS度的短期 (第一代) 和长期 (第六代) 影响.
主要方法:
- 春尾 (Folsomia candida) 在土壤中暴露于单一和联合AS处理,度为0.01,0.1和1毫克/公斤-1.1.
- 评估青少年生殖,进行转录组分析以确定受影响的生物通路.
- 分析了肠道细菌微生物群的多样性和组成.
主要成果:
- 第一代暴露于0.1mgkg-1AS显著增加了青少年的生殖能力.
- 转录学揭示了与春尾动物的新陈代谢和细胞过程相关的改变途径.
- AS改变了肠道微生物的α多样性,并增加了Achromobacter属的丰富性;长期暴露显示出更明显的肠道微生物群干扰和抑制繁殖.
结论:
- 人工甜味剂在土壤环境中存在生态风险.
- 暴露于AS会影响土壤无脊椎动物生理学,繁殖和肠道微生物社区结构.
- 这些发现凸显了对AS等新兴污染物的长期生态毒理学影响的进一步研究的需要.
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