低分子量有机酸抑制了在米土壤中依赖甲的酸盐减少过程
Yu Zhang1, Di Tong1, Lina Zou2
1Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, China.
Ecotoxicology and environmental safety
|July 17, 2024
概括
低分子量有机酸 (LMWOAs) 抑制在米土壤中依赖甲的酸盐减少 (M-AsR). 这些有机酸通过抑制参与M-AsR过程的关键微生物来减少 (As) 的释放.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 地质化学 地质化学
背景情况:
- 厌氧甲氧化 (AOM) 驱动土壤酸盐减少 (M-AsR),这是释放的关键因素.
- 在大米根排泄物中常见的低分子量有机酸 (LMWOAs) 对M-AsR的影响尚不清楚.
研究的目的:
- 调查LMWOA对米土壤中依赖甲的酸盐减少 (M-AsR) 过程的影响和机制.
- 阐明LMWOA如何影响 (As) 释放以及M-AsR.中涉及的微生物群落.
主要方法:
- 将酸,酸和酸添加到污染的土中.
- 在无氧条件下进行化,注射13CH4.
- 对土壤孔水化学 (,Fe,II,溶解有机碳) 和微生物群落 (qPCR,测序) 的分析.
主要成果:
- 在14天内,LMWOAs显著抑制了M-AsR过程,降低了土壤孔水中的度35.1-65.7%.
- 酸显示出最强的抑制作用,其次是酸和酸.
- LMWOAs改变了土壤孔水化学和抑制了与ANME-2d和arrA相关的微生物,这是M-AsR的关键参与者.
结论:
- LMWOAs通过抑制参与无氧甲氧化和酸盐减少的特定微生物群体来抑制M-AsR.
- 了解LMWOA的影响对于管理在土中的释放至关重要.
- 这项研究为调节M-AsR和理解根球环境中的As生物地球化学循环提供了理论基础.
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