Journal article
Arbuscular mycorrhizal fungi and goethite promote carbon sequestration via hyphal-aggregate mineral interactions
Soil biology & biochemistry, Vol.162, 108417
01/11/2021
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Abstract
Goethite is known to contribute to the co-precipitation of rhizodeposits and thus benefit carbon (C) sequestration, while arbuscular mycorrhizal fungi (AMF) play significant role in soil organic C (SOC), however, the combined effect is less known. To address this paucity in knowledge, we compared the physicochemical stabilization and microbial mineralization of rhizodeposits from maize (Zea mays L.) and the rhizosphere priming effect (RPE) in soils with a combination of goethite addition and AMF inoculation. Here, we showed that compared to the control: i) Co-amendment of AMF and goethite resulted in a 0.6-fold decrease of rhizodeposit derived CO2, and a 2.8-fold larger allocation of rhizodeposits into macro-aggregates, most likely due to precipitation by goethite and macro-aggregate formation stimulated by AMF hyphae. Analyses using mu-FTIR confirmed the spatial distribution of polysaccharides overlapped with Fe-O minerals within macro-aggregates, supporting the concomitant processes of rhizodeposit stabilization and aggregate formation via hyphalaggregate mineral interactions; ii) Inoculation with AMF accelerated SOC turnover by increasing the RPE (by 6.1 mg C kg-1 day-1, 74% increase) and rhizodeposit stabilization (by 6.2 mg C kg-1 soil day-1, 47% increase). The larger soil priming effect stimulated by AMF was associated with several genera including Solirubrobacter, Pseudomonas and Talaromyces, suggesting these hyper-symbionts were involved in nutrient acquisition (mining hypothesis). Our results enabled the comparison between rhizodeposit stabilization versus rhizodeposit and SOC mineralization, and highlighted the contributions of both goethite (abiotic contribution) and AMF (biotic contribution) to C accrual in a soil-plant system.
Details
- Title
- Arbuscular mycorrhizal fungi and goethite promote carbon sequestration via hyphal-aggregate mineral interactions
- Creators
- Peduruhewa H. Jeewani - Zhejiang UniversityYu Luo - Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, ChinaGuanghui Yu - Tianjin UniversityYingyi Fu - Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, ChinaXinhua He - Southwest UniversityLukas Van Zwieten - New South Wales Department of Primary IndustriesChao Liang - Institute of Applied EcologyAmit Kumar - Leuphana University of LüneburgYan He - Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, ChinaYakov Kuzyakov - Applied Science Private UniversityHua Qin - Zhejiang A & F UniversityGeorg Guggenberger - Leibniz University HannoverJianming Xu - Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, 310058, China
- Publication Details
- Soil biology & biochemistry, Vol.162, 108417
- Publisher
- Elsevier Ltd
- Number of pages
- 11
- Grant note
- This study was supported by the National Natural Science Foundation of China (NSFC) (41671233, U1901601), Zhejiang Outstanding Youth Fund (R19D010005), the Competitive Growth Program of Kazan Federal University, Russia and the “RUDN University program 5–100”. We thank Dr. Xiaojie Zhou at the BL01B beamline of the National Center for Protein Science Shanghai (NCPSS) at Shanghai Synchrotron Radiation Facility for assistance during SR-FTIR data collection.
- Identifiers
- 991013054664002368
- Copyright
- © 2021 Published by Elsevier Ltd.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article