Methanotrophy-driven accumulation of organic carbon in four paddy soils of Bangladesh

作     者：Nasrin SULTANA Jun ZHAO Yuanfeng CAI G.K.M.Mustafizur RAHMAN Mohammad Saiful ALAM Mohammad FAHEEM Adrian HO Zhongjun JIA Nasrin SULTANA;Jun ZHAO;Yuanfeng CAI;G.K.M.Mustafizur RAHMAN;Mohammad Saiful ALAM;Mohammad FAHEEM;Adrian HO;Zhongjun JIA

作者机构：State Key Laboratory of Soil and Sustainable AgricultureInstitute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of SciencesBeijing 100049China Department of Agroforestry and Environmental ScienceFaculty of AgricultureSher-e-Bangla Agricultural University(SAU)Sher-e-Bangla NagarDhaka-1207Bangladesh Department of Soil ScienceFaculty of AgricultureBangabandhu Sheikh Mujibur Rahman Agricultural University(BSMRAU)Gazipur-1706Bangladesh Institute for MicrobiologyLeibniz Universität HannoverHerrenhäuser Straße 2Building 4104Hannover D-30419Germany 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2022年第32卷第2期

页      面：348-358页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 91751204, 41630862, 41701302, 41530857, and 41877062) The first author, Ms. Nasrin Sultana, gratefully acknowledges the Organization for Women in Science for the Developing World (OWSD) Ph.D. Fellowship 

主　　题：16S rRNA gene DNA-based stable-isotope probing(DNA-SIP) methane oxidation methanotroph pmoA rice soil soil organic carbon soil organic matter 

摘      要：Biological methane oxidation is a crucial process in the global carbon cycle that reduces methane emissions from paddy fields and natural wetlands into the ***,soil organic carbon accumulation associated with microbial methane oxidation is poorly ***,to investigate methane-derived carbon incorporation into soil organic matter,paddy soils originated from different parent materials(Inceptisol,Entisol,and Alfisol) were collected after rice harvesting from four major rice-producing regions in *** microcosm incubation with 5%(volume/volume)^(13) CH_(4),soil^(13) C-atom abundances significantly increased from background level of 1.08% to 1.88%–2.78%,leading to a net methane-derived accumulation of soil organic carbon ranging from 120 to 307 mg kg^(-1).Approximately 23.6%–60.0% of the methane consumed was converted to soil organic carbon during microbial methane *** phylogeny of^(13) C-labeled pmoA(enconding the alpha subunit of the particulate methane monooxygenase) and 16 S rRNA genes further revealed that canonical α(type II) and γ(type I) Proteobacteria were active methane *** within the Methylobacter-and Methylosarcina-affiliated type Ia lineages dominated active methane-oxidizing communities that were responsible for the majority of methane-derived carbon accumulation in all three paddy soils,while Methylocystis-affiliated type IIa lineage was the key contributor in one paddy soil of Inceptisol *** results suggest that methanotroph-mediated synthesis of biomass plays an important role in soil organic matter *** study thus supports the concept that methanotrophs not only consume the greenhouse gas methane but also serve as a key biotic factor in maintaining soil fertility.