菌体通过塑造细菌群体影响土壤溶解的有机物质矿化
Xiaolei Zhao1,2,3, Xiaolong Liang4, Zhenke Zhu2,3
1College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China.
Environmental science & technology
|January 21, 2025
概括
菌体 (菌体) 通过改变细菌群体和促进溶解有机物 (DOM) 矿化,影响土壤碳循环. 温度会影响这些菌体驱动的过程的大小.
科学领域:
- 微生物生态学 微生物生态学
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
背景情况:
- 众所周知,病毒,特别是菌体 (菌体),可以调节细菌群落和陆地营养循环.
- 菌体在溶解有机物 (DOM) 矿化过程中对细菌代谢和碳 (C) 动态的精确影响尚不清楚.
研究的目的:
- 研究活性和非活性菌体对土壤DOM矿化和细菌社区结构的影响.
- 阐明菌体影响土壤生态系统中碳循环的机制.
主要方法:
- 添加活跃和不活跃的菌体到土壤DOM中,其中有本地细菌群落.
- 在两种不同的温度下 (18°C和23°C) 进行了35天的化实验.
- 监测二氧化碳排放率,细菌群体组成和预测的微生物组功能.
主要成果:
- 菌体最初减少了二氧化碳排放量,但大幅增加了累积的二氧化碳排放量,这表明DOM矿物化的增强.
- 菌体通过减少主导种群和增加多样性来改变细菌群体,促进参与复杂化合物降解的种群的生长.
- 较高的温度放大了菌-细菌相互作用,细菌多样性和酶活动,导致DOM矿化增加16%.
结论:
- 菌体通过重组微生物群落并修改它们的功能,显著影响土壤DOM矿化.
- 温度充当调节器,影响菌体驱动的DOM矿化程度,而不会对整体过程产生质量变化.
- 这些发现凸显了病毒在土壤碳循环和微生物生态系统功能中的关键作用.
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