各种微生物种群在土中将转化为和碳循环
Xin-Di Zhao1, Zi-Yu Gao1, Jingjing Peng2
1School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China.
Microbiome
|November 15, 2024
概括
这项研究确定了关键的微生物群落和负责氧化和减少田素的基因. 它揭示了这些过程如何将循环与土壤中的和碳代谢联系起来.
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
- 基因组学就是基因组学.
背景情况:
- (As) 代谢对元素生物地化学循环至关重要,影响 (N) 和碳 (C) 循环.
- 了解微生物对As应激的反应,以及在现场确定关键的As转化种群仍然具有挑战性.
研究的目的:
- 使用ROCker配置文件精确检测和量化As氧化和还原基因.
- 调查涉及到田中As转化的主导微生物群落.
- 揭示合As代谢与N和C循环的途径.
主要方法:
- 开发并应用了五种ROCker模型来量化As氧化 (aioA, arxA) 和还原 (arrA, arsC1, arsC2) 基因.
- 从大米土壤中分析了短读元基因组和元转录元基因组数据.
- 与N和C循环基因相关的As基因的转录活动.
主要成果:
- 具有aioA和arsC2基因的子社区在As (III) 氧化和As (V) 减少方面分别占主导地位.
- 发现了一种新型的As (III) 氧化基因,ArxA,在性土壤中表现出较高的活性.
- 显著的相关性表明了As氧化与脱和As减少与甲氧化的合.
- 像Burkholderiales,Desulfatiglandales和Hyphomicrobiales这样的微生物种类参与了合的As-N-C代谢.
结论:
- 定制的ROCker模型使得可以全面检测As氧化/还原基因.
- 揭示了在米土壤中参与合As与N和C代谢的多种微生物种群.
- 突出了 arxA 和 arsC 亚群体在将 As 循环与酸盐还原和甲氧化相联系中的作用.
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