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根系球作为依赖酸盐和酸盐的热点在田中甲的无氧氧氧化

Yanping Wang¹, Yanan Bai¹, Lidong Shen¹

¹Key Laboratory of Ecosystem Carbon Source and Sink, China Meteorological Administration (ECSS-CMA), School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China.

Environmental pollution (Barking, Essex : 1987)

|June 21, 2025

概括

由于NC10细菌的增加,大米根球显著增加了依赖酸盐和酸盐的甲无氧氧化 (AOM). 这一发现凸显了树根圈作为在田中AOM的关键区域.

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
土壤科学土壤科学

背景情况:

甲的无氧氧化 (AOM) 对碳和循环至关重要.
在田环境中,依赖酸盐和酸盐的AOM通路仍未得到充分研究.
在这些AOM过程中,大米根球的具体作用在很大程度上是未知的.

研究的目的:

为了研究和酸盐依赖的AOM在米根球土壤中的贡献和调节.
为了比较AOM活动和菌群在根球与土壤中的微生物群体.
为了阐明影响这些在田内的AOM通路的因素.

主要方法:

在根系球和土壤批量样本中量化酸盐和酸盐AOM活动.
使用定量PCR进行NC10细菌丰度的评估.
高通量测序用于分析微生物群体组成 (NC10细菌和ANME-2d古生物).
部分最小平方路径建模 (PLS-PM) 以确定监管因素.

主要成果:

与散装土壤相比,树叶球土壤的酸盐-AOM (132%的增加) 和酸盐-AOM (87%的增加) 活动显著增加.
在根系球中,NC10细菌的丰富程度明显高于散土 (高达2.04 × 10^7副本g-1干土),而不是散土.
在根球和散土之间观察到NC10细菌和ANME-2d古菌的独特微生物群落.
土壤特性影响了NC10细菌的丰富性,这反过来影响了酸盐-AOM活性.
酸盐-AOM活动受到土壤特性和ANME-2d古生物的丰富程度的影响.

结论:

根球是依赖酸盐和酸盐的AOM的活跃区域.
根球土壤特性和特定的微生物群落 (NC10细菌,ANME-2d古生物) 是AOM的关键调节者.
这项研究完善了对AOM在田生态系统中的意义的理解.

关键词:

活动活动活动.大量的土壤土壤.共同体的组成共同体的组成亚酸盐-AOM 的使用.亚酸盐-AOMOM是一种酸盐.球土壤土壤球土壤土壤

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