气候变化领域集成服务门户(CCPortal): Legume-microbiome interactions unlock mineral nutrients in regrowing tropical forests

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DOI	10.1073/pnas.2022241118
	Legume-microbiome interactions unlock mineral nutrients in regrowing tropical forests
	Epihov D.Z.; Saltonstall K.; Batterman S.A.; Hedin L.O.; Hall J.S.; van Breugel M.; Leake J.R.; Beerling D.J.
发表日期	2021
ISSN	00278424
卷号	118 期号:11
英文摘要	Legume trees form an abundant and functionally important component of tropical forests worldwide with N2-fixing symbioses linked to enhanced growth and recruitment in early secondary succession. However, it remains unclear how N2-fixers meet the high demands for inorganic nutrients imposed by rapid biomass accumulation on nutrient-poor tropical soils. Here, we show that N2-fixing trees in secondary Neotropical forests triggered twofold higher in situ weathering of fresh primary silicates compared to non-N2-fixing trees and induced locally enhanced nutrient cycling by the soil microbiome community. Shotgun metagenomic data from weathered minerals support the role of enhanced nitrogen and carbon cycling in increasing acidity and weathering. Metagenomic and marker gene analyses further revealed increased microbial potential beneath N2-fixers for anaerobic iron reduction, a process regulating the pool of phosphorus bound to iron-bearing soil minerals. We find that the Fe(III)-reducing gene pool in soil is dominated by acidophilic Acidobacteria, including a highly abundant genus of previously undescribed bacteria, Candidatus Acidoferrum, genus novus. The resulting dependence of the Fe-cycling gene pool to pH determines the high iron-reducing potential encoded in the metagenome of the more acidic soils of N2-fixers and their nonfixing neighbors. We infer that by promoting the activities of a specialized local microbiome through changes in soil pH and C:N ratios, N2-fixing trees can influence the wider biogeochemical functioning of tropical forest ecosystems in a manner that enhances their ability to assimilate and store atmospheric carbon. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Acidobacteria; Metagenomics; Mineral weathering; N2-fixing legume trees; Tropical forest
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180266
作者单位	Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2TN, United Kingdom; Leverhulme Centre for Climate Change Mitigation, University of Sheffield, Sheffield, S10 2TN, United Kingdom; Smithsonian Tropical Research Institute, Ancón, Panamá, 0843, Panama; School of Geography and Priestley International Centre for Climate, University of Leeds, Leeds, LS2 9JT, United Kingdom; Cary Institute of Ecosystem Studies, Millbrook, NY 12545, United States; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, United States; Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Ancón, Panamá, 0843, Panama; Yale-NUS College, Singapore, 138527, Singapore; Department of Biological Sciences, National University of Singapore, Singapore, 119077, Singapore
推荐引用方式 GB/T 7714	Epihov D.Z.,Saltonstall K.,Batterman S.A.,et al. Legume-microbiome interactions unlock mineral nutrients in regrowing tropical forests[J],2021,118(11).
APA	Epihov D.Z..,Saltonstall K..,Batterman S.A..,Hedin L.O..,Hall J.S..,...&Beerling D.J..(2021).Legume-microbiome interactions unlock mineral nutrients in regrowing tropical forests.Proceedings of the National Academy of Sciences of the United States of America,118(11).
MLA	Epihov D.Z.,et al."Legume-microbiome interactions unlock mineral nutrients in regrowing tropical forests".Proceedings of the National Academy of Sciences of the United States of America 118.11(2021).