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代谢回氧合控制永久土受影响的泥炭地中的甲生产通过有机物质质量依赖的能量分配

John A Bouranis¹, Bridget B McGivern^2,3, Ghiwa Makke¹

¹Department of Environmental Science, University of Arizona, Tucson, Arizona, USA.

Global change biology

|August 7, 2025

概括

永久土融化会释放温室气体,但有机物质质量会影响微生物的处理. 了解碳质量如何影响微生物的能源使用是预测永久土解排放的关键.

科学领域:

环境科学环境科学
微生物学微生物学
气候科学气候科学

背景情况:

永久土的融化是一个主要的气候反风险,可能会释放大量的碳储存作为温室气体.
由于对有机物组成如何影响微生物碳循环的理解有限,因此预测这些排放具有挑战性.

研究的目的:

机械地解释有机物代谢物质质量如何控制永久土泥炭地中的温室气体产量.
测试一种以代谢为中心的氧化还原框架,将微生物电子流与温室气体排放联系起来.

主要方法:

在来自对比的沼泽和环境的活跃层泥炭上利用了多种omics (代谢学,基因组学,转录学).
分析了溶解有机物代谢物组成,并将其与微生物功能和基因表达联系起来.
研究了微生物如何通过代谢途径平衡电子流来维持氧化还原平衡.

主要成果:

系统显示基质较高的有机物质 (糖) 与增加的氧化代谢和甲基生成有关.
沼泽系统主要由质量较低的基质有机物 () 占主导地位,而能量被转移到细胞维护上.
不同的代谢物概况与微生物代谢和温室气体生产潜力的差异相关.

结论:

有机物质的质量显著影响了永久土生态系统中的微生物能量分配策略.
一个以代谢为中心的氧化还原框架为温室气体生产提供了机理性的洞察力.
更好地了解这些过程对于完善气候模型和预测永久土解的未来排放至关重要.

关键词:

碳循环循环的过程整合性的多主题.代谢生物组的代谢生物组转基因组学是指转基因组学.转换组学转换组学转换组学甲基生物发生 (methanogenesis)微生物的新陈代谢泥炭地泥炭地泥炭地泥炭地泥炭地泥炭地氧化复原化学氧化复原化学

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