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Updated: Jun 25, 2025

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微生物多代谢是永久土解碳循环的一部分

Bridget B McGivern¹, Dylan R Cronin^2,3, Jared B Ellenbogen¹

¹Department of Soil and Crop Science, Colorado State University, Fort Collins, CO, USA.

Nature microbiology

|May 28, 2024

概括

永久土的融化释放碳,但酶锁定理论.

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
北极科学科学北极科学

背景情况:

全球气温上升威胁着永久土的碳储量.
酶锁理论预测过的泥炭地中聚烯的积累,稳定碳.
氧化酶活性是这一理论的关键,在和条件下预计活性较低.

研究的目的:

在一个模拟的北极泥炭地中调查酶锁定理论的有效性.
在不同的氧化还原条件下识别多降解的替代微生物途径.

主要方法:

微生物组和地化学测量沿着永久土融化诱导的和梯度.
开发和应用CAMPER,一种用于多酶的基因注释工具.
使用CAMPER进行基因组解析的转录基因组的分析.

主要成果:

证实了氧化酶表达和土壤和之间的负关系.
没有发现对其他酶锁定理论预测的支持.
在微生物血统和氧化还原条件下识别出多样化,表达的多活性酶.

结论:

酶锁理论对通过和土壤中聚烯积累的碳稳定性的预测受到挑战.
微生物群落在氧和无氧条件下拥有多代谢的多种策略.
更广泛地了解多代谢对于预测永久土解中的碳循环至关重要.

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