甲基囊菌在高温下在冰川前陆土壤中主导甲氧化
Xinshu Zhu1,2, Yongcui Deng3,4, Yongqin Liu1,5
1Center for the Pan-third Pole Environment, Lanzhou University, Lanzhou 730000, China.
FEMS microbiology letters
|February 17, 2024
概括
冰川土壤中的甲氧化细菌 (甲营养菌) 可以在高温下变得活跃. 介质性甲基囊菌在35°C生长,这表明它在温暖的寒冷地区减轻温室气体排放方面发挥了作用.
科学领域:
- 微生物学 微生物学
- 环境科学 环境科学
- 地质科学 地质科学
背景情况:
- 甲氧化细菌 (甲营养菌) 对于在寒冷环境中减轻甲排放至关重要.
- 这些微生物对冰川地区温度超过in-situ条件的反应仍未得到充分研究.
研究的目的:
- 在高温 (35°C) 下,研究冰川林地土壤中甲类植物的活动和社区结构.
- 评估土壤水含量对高温下甲氧化潜力的影响.
主要方法:
- 采集的土壤样本来自Longxiazailongba (LXZ) 和Qiangyong (QY) 冰川前陆地.
- 在不同的土壤和水的条件下,在35°C的13CH4的微宇宙化.
- DNA稳定同位素探测 (DNA-SIP) 与高通量测序相结合,以识别活性甲类生物.
主要成果:
- 在LXZ和QY土壤中,甲氧化潜力在35°C显著增加,特别是在丰富的甲和氧气中.
- 土壤中的水含量影响了甲氧化率.
- 在35°C时,以前未被检测到具有活跃作用的美索菲尔甲基菌Methylocystis变得占主导地位.
结论:
- 甲基囊可以在长时间的低温下生存,并在有利的条件下变得代谢活跃.
- 在寒冷的息地中存在和活动的美索菲尔甲类植物对温室气体调节在温暖的冰川环境有重大影响.
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