Microbial controls over soil priming effects under chronic nitrogen and phosphorus additions in subtropical forests
Li, Jian (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Liu, Zhanfeng (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Jin, Ming-Kang (Chinese Academy of Sciences. Key Laboratory of Urban Environment and Health)
Zhang, Wei (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Lambers, Hans (University of Western Australia. School of Biological Sciences)
Hui, Dafeng (Tennessee State University. Department of Biological Sciences)
Liang, Chao (Chinese Academy of Sciences. Institute of Applied Ecology)
Zhang, Jing (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Wu, Donghai (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Petticord, Daniel F. (Cornell University. Department of Ecology & Evolutionary Biology)
Frey, David W. (Cornell University. Department of Ecology & Evolutionary Biology)
Zhu, Yong-Guan (Chinese Academy of Sciences. Key Laboratory of Urban Environment and Health)

Date:	2023
Abstract:	The soil priming effect (PE), defined as the modification of soil organic matter decomposition by labile carbon (C) inputs, is known to influence C storage in terrestrial ecosystems. However, how chronic nutrient addition, particularly in leguminous and non-leguminous forests, will affect PE through interaction with nutrient (e. g. , nitrogen and phosphorus) availability is still unclear. Therefore, we collected soils from leguminous and non-leguminous subtropical plantations across a suite of historical nutrient addition regimes. We added 13C-labeled glucose to investigate how background soil nutrient conditions and microbial communities affect priming and its potential microbial mechanisms. Glucose addition increased soil organic matter decomposition and prompted positive priming in all soils, regardless of dominant overstory tree species or fertilizer treatment. In non-leguminous soil, only combined nitrogen and phosphorus addition led to a higher positive priming than the control. Conversely, soils beneath N-fixing leguminous plants responded positively to P addition alone, as well as to joint NP addition compared to control. Using DNA stable-isotope probing, high-throughput quantitative PCR, enzyme assays and microbial C substrate utilization, we found that positive PE was associated with increased microbial C utilization, accompanied by an increase in microbial community activity, nutrient-related gene abundance, and enzyme activities. Our findings suggest that the balance between soil available N and P effects on the PE, was dependent on rhizosphere microbial community composition. Furthermore, these findings highlight the roles of the interaction between plants and their symbiotic microbial communities in affecting soil priming and improve our understanding of the potential microbial pathways underlying soil PEs.
Grants:	Agencia Estatal de Investigación TED2021-132627B-I00 Agencia Estatal de Investigación PID2020-115770RB-I00
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Biogeochemistry ; Microbial ecology
Published in:	The ISME Journal, Published online 29 September 2023, ISSN 1751-7370

DOI: 10.1038/s41396-023-01523-9
PMID: 37773438

Available from: 2024-12-30 Postprint

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Research articles
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