海洋真菌对有机物质的降解在极地和非极地水域之间有所不同
Kangli Guo1, Zihao Zhao2, Eva Breyer2,3
1Fungal and Biogeochemical Oceanography Group, Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria. kangli.guo@univie.ac.at.
Nature communications
|August 15, 2025
概括
海底真菌是海洋有机物回收的关键. 温度等环境因素影响它们的碳水化合物降解功能,影响全球海洋循环.
科学领域:
- 海洋微生物学 海洋微生物学
- 海洋学 海洋学 海洋学
- 生物地质化学生物地质化学
背景情况:
- 类真菌因其在海洋有机物分解中的作用而越来越受认可.
- 类真菌的关键驱动因素和功能作用,特别是与 prokaryotes 相比,仍然不太了解.
- 研究类真菌对于了解海洋碳循环至关重要.
研究的目的:
- 调查海底真菌在不同海洋地区有机物降解中的功能作用和社区组成.
- 确定塑造真菌功能的环境驱动因素,特别是碳水化合物和蛋白质降解.
- 探索海底真菌的小和大尺寸部分之间的利基区分.
主要方法:
- 利用元基因组和元转录组分析来评估真菌群落及其基因表达.
- 从亚热带大西洋 (非极地) 到南大洋 (极地) 地区收集的样本.
- 在小 (0.23μm) 和大 (>3μm) 尺寸分数之间进行区分,以分析利基分割.
主要成果:
- 菌构成25%的真核基因和转录,在碳水化合物降解 (碳水化合物活性酶转录的>3%) 和蛋白质降解 (<0.5%) 中发挥着专门的作用.
- 在非极地和极地之间观察到不同的真菌社区结构和代谢功能.
- 温度被确定为真菌碳水化合物活性酶活性的重要驱动因素,表明对海洋变暖的敏感性.
结论:
- 类真菌积极促进有机物质的降解,主要集中在碳水化合物上.
- 地理位置 (极地与非极地) 和温度显著影响真菌群体的组成和功能.
- 这些发现凸显了海洋有机物循环的脆弱性,以应对气候变化和海洋变暖.
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