被损坏的叶子淹没的巨生物释放的有机酸改变了根系球中的脱微生物群体
Ziqi Liu1, Xingjia Yin2, Naidong Xiao1
1Laboratory of Eco-Environmental Engineering Research, State Environmental Protection Key Laboratory of Soil Health and Green Remediation, Huazhong Agricultural University, Wuhan 430070, China.
The Science of the total environment
|June 21, 2024
概括
被淹没的植物叶子损伤会改变树根球微生物群落,影响循环. 这项研究表明,叶子损伤增加有机酸和特定细菌,影响水生沉积物中的脱和anammox过程.
科学领域:
- 环境微生物学 环境微生物学
- 水生生态学 水生生态学
- 生物地质化学循环的过程
背景情况:
- 潜水中的巨细胞在水中循环中发挥着至关重要的作用,影响脱和无氧氨氧化 (anammox) 过程.
- 这些植物的叶子损伤可以改变树根球环境,影响有机酸释放和微生物群落,但缺乏全面的理解.
研究的目的:
- 为了研究叶子损伤后,Potamogeton crispus的根球环境和微生物群落的特定变化.
- 评估不同程度的叶子切除对有机酸度和无化和菌的丰度的影响.
主要方法:
- 波塔莫杰顿的植物经历了受控的叶子切除 (0%,30%,50%,70%).
- 用定量PCR分析了树脂圈和沉积物样本,以检测总有机酸度和NIRS型脱和anammox细菌的丰富程度.
- 分析了微生物群落组成和共发生网络,以及与环境参数的相关性.
主要成果:
- 叶子损伤显著增加了总有机酸度和根系球中的nirS型脱细菌的丰富性.
- 阿纳莫克斯细菌的数量最初随着叶子的损伤而减少,但随后稳定,而某些属内的微生物多样性发生了变化.
- 与非树叶球环境相比,树叶球微生物群落表现出明显的共发生模式,在微生物丰富度和有机酸/亚酸盐水平之间观察到正相关性.
结论:
- 浸水的巨植物叶子损伤对树根球脱微生物群落的结构和功能产生重大影响.
- 微生物群落及其活动中的这些变化可以显著改变水体沉积物中的循环过程.
- 了解这些植物-微生物-环境相互作用对于管理水生生态系统及其生物地化学功能至关重要.
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