Oxygen preference of deeply-rooted mesophilic thaumarchaeota in forest soil
Oxygen preference of deeply-rooted mesophilic thaumarchaeota in forest soil
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DOI：
10.1016/j.soilbio.2020.107848
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发表时间：
2020-09-01
影响因子：
9.7
通讯作者：
Gubry-Rangin, Cecile
中科院分区：
文献类型：
--
作者：
Biggs-Weber, Eva;Aigle, Axel;Gubry-Rangin, Cecile
土壤微生物需要新陈代谢策略来应对在一系列时间尺度上发生在土壤中的氧气利用率的显著变化。塔乌玛考古群1.1a和1.1b中的氨氧化菌是需氧的，但根深蒂固的塔乌玛考古塔的氧气偏好和代谢潜力仍不清楚，几项研究为有氧和厌氧代谢提供了证据。因此，本研究的目的是通过在缺氧或缺氧条件下培养的氧化和缺氧苏格兰松林土壤进行的受控微观世界实验中，确定氧气对1.1c和1.3thaumarotal群落的影响。虽然我们预计在这些泥炭地土壤中会有更多的厌氧生长代谢，但我们证明了在1.1c组中有多个需氧簇生长，在1.3组中有厌氧生长。这些发现扩展了我们对根深蒂固的中温细菌的生理学的理解，并为它们在土壤中的生长提供了第一个详细的定性和定量评估。
Soil microorganisms require metabolic strategies to cope with the significant variations in oxygen availability that occur in soil over a range of time scales. Characterised ammonia-oxidisers within Thaumarchaeota Groups 1.1a and 1.1b are aerobic, but the oxygen preference and metabolic potential of deeply-rooted Thaumarchaeota remain unknown, with several studies providing evidence for both aerobic and anaerobic metabolisms. This study therefore aimed to determine the influence of oxygen on the mesophilic Group 1.1c and Group 1.3 thaumarchaeotal community in controlled microcosm experiments conducted using oxic and anoxic Scottish pine forest soils, incubated under oxic or anoxic conditions. While we expected more anaerobic growth metabolism in those peatland soils, we demonstrated growth of multiple aerobic clusters within Group 1.1c Thaumarchaeota and anaerobic growth within Group 1.3 Thaumarchaeota. These findings extend our understanding of the physiology of deeply-rooted mesophilic Thaumarchaeota and provide the first detailed qualitative and quantitative assessment of their growth in soil.