Sustained bacterial N2O reduction at acidic pH

被引：3

作者：

He, Guang ^{[1
,2
]}

Chen, Gao ^{[2
,3
]}

Xie, Yongchao ^{[2
,7
]}

Swift, Cynthia M. ^{[2
,3
]}

Ramirez, Diana ^{[4
,5
]}

Cha, Gyuhyon ^{[6
]}

Konstantinidis, Konstantinos T. ^{[6
]}

Radosevich, Mark ^{[1
]}

Loffler, Frank E. ^{[1
,2
,3
,4
,5
]}

机构：

[1] Univ Tennessee, Dept Biosyst Engn & Soil Sci, Knoxville, TN 37996 USA

[2] Univ Tennessee, Dept Civil & Environm Engn, Knoxville, TN 37996 USA

[3] Univ Tennessee, Ctr Environm Biotechnol, Knoxville, TN 37996 USA

[4] Univ Tennessee, Dept Microbiol, Knoxville, TN 37996 USA

[5] Biosci Div, Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[6] Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA

[7] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

来源：

NATURE COMMUNICATIONS | 2024年 / 15卷 / 01期

基金：

美国国家科学基金会;

关键词：

NITROUS-OXIDE N2O; 16S RIBOSOMAL-RNA; SOIL; DENITRIFICATION; ANNOTATION; EMISSION; FLUXES; CH4; ACCUMULATION; DEHALOGENASE;

D O I：

10.1038/s41467-024-48236-x

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Nitrous oxide (N2O) is a climate-active gas with emissions predicted to increase due to agricultural intensification. Microbial reduction of N2O to dinitrogen (N-2) is the major consumption process but microbial N2O reduction under acidic conditions is considered negligible, albeit strongly acidic soils harbor nosZ genes encoding N2O reductase. Here, we study a co-culture derived from acidic tropical forest soil that reduces N2O at pH 4.5. The co-culture exhibits bimodal growth with a Serratia sp. fermenting pyruvate followed by hydrogenotrophic N2O reduction by a Desulfosporosinus sp. Integrated omics and physiological characterization revealed interspecies nutritional interactions, with the pyruvate fermenting Serratia sp. supplying amino acids as essential growth factors to the N2O-reducing Desulfosporosinus sp. Thus, we demonstrate growth-linked N2O reduction between pH 4.5 and 6, highlighting microbial N2O reduction potential in acidic soils.

引用

页数：14

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