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Liu R, Zhou X, He Y, Du Z, Chen H, Fu Y, Guo L, Zhou G, Zhou L, Li J, Chai H, Huang C, Delgado-Baquerizo M. A transition from arbuscular to ectomycorrhizal forests halts soil carbon sequestration during subtropical forest rewilding. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174330. [PMID: 38945245 DOI: 10.1016/j.scitotenv.2024.174330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 06/18/2024] [Accepted: 06/25/2024] [Indexed: 07/02/2024]
Abstract
Ecological succession and restoration rapidly promote multiple dimensions of ecosystem functions and mitigate global climate change. However, the factors governing the limited capacity to sequester soil organic carbon (SOC) in old forests are poorly understood. Ecological theory predicts that plants and microorganisms jointly evolve into a more mutualistic relationship to accelerate detritus decomposition and nutrient regeneration in old than young forests, likely explaining the changes in C sinks across forest succession or rewilding. To test this hypothesis, we conducted a field experiment of root-mycorrhizal exclusion in successional subtropical forests to investigate plant-decomposer interactions and their effects on SOC sequestration. Our results showed that SOC accrual rate at the 0-10 cm soil layer was 1.26 mg g-1 yr-1 in early-successional arbuscular mycorrhizal (AM) forests, which was higher than that in the late-successional ectomycorrhizal (EcM) forests with non-significant change. A transition from early-successional AM to late-successional EcM forests increase fungal diversity, especially EcM fungi. In the late-successional forests, the presence of ectomycorrhizal hyphae promotes SOC decomposition and nutrient cycle by increasing soil nitrogen and phosphorus degrading enzyme activity as well as saprotrophic microbial richness. Across early- to late-successional forests, mycorrhizal priming effects on SOC decomposition explain a slow-down in the capacity of older forests to sequester soil C. Our findings suggest that a transition from AM to EcM forests supporting greater C decomposition can halt the capacity of forests to provide nature-based global climate change solutions.
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Affiliation(s)
- Ruiqiang Liu
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Xuhui Zhou
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China; Center for Global Change and Ecological Forecasting, Tiantong National Field Station for Forest Ecosystem Research, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200062, China.
| | - Yanghui He
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Zhenggang Du
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Hongyang Chen
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Yuling Fu
- Center for Global Change and Ecological Forecasting, Tiantong National Field Station for Forest Ecosystem Research, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200062, China
| | - Liqi Guo
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Guiyao Zhou
- Laboratorio de Biodiversidad y Funcionamiento Ecosistémico, Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), CSIC, Av. Reina Mercedes 10, E-41012 Sevilla, Spain
| | - Lingyan Zhou
- Center for Global Change and Ecological Forecasting, Tiantong National Field Station for Forest Ecosystem Research, Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200062, China
| | - Jie Li
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Hua Chai
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Changjiang Huang
- Northeast Asia ecosystem Carbon sink research Center (NACC), Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Manuel Delgado-Baquerizo
- Laboratorio de Biodiversidad y Funcionamiento Ecosistémico, Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNAS), CSIC, Av. Reina Mercedes 10, E-41012 Sevilla, Spain
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Pena R, Tibbett M. Mycorrhizal symbiosis and the nitrogen nutrition of forest trees. Appl Microbiol Biotechnol 2024; 108:461. [PMID: 39249589 PMCID: PMC11384646 DOI: 10.1007/s00253-024-13298-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2024] [Revised: 08/27/2024] [Accepted: 08/28/2024] [Indexed: 09/10/2024]
Abstract
Terrestrial plants form primarily mutualistic symbiosis with mycorrhizal fungi based on a compatible exchange of solutes between plant and fungal partners. A key attribute of this symbiosis is the acquisition of soil nutrients by the fungus for the benefit of the plant in exchange for a carbon supply to the fungus. The interaction can range from mutualistic to parasitic depending on environmental and physiological contexts. This review considers current knowledge of the functionality of ectomycorrhizal (EM) symbiosis in the mobilisation and acquisition of soil nitrogen (N) in northern hemisphere forest ecosystems, highlighting the functional diversity of the fungi and the variation of symbiotic benefits, including the dynamics of N transfer to the plant. It provides an overview of recent advances in understanding 'mycorrhizal decomposition' for N release from organic or mineral-organic forms. Additionally, it emphasises the taxon-specific traits of EM fungi in soil N uptake. While the effects of EM communities on tree N are likely consistent across different communities regardless of species composition, the sink activities of various fungal taxa for tree carbon and N resources drive the dynamic continuum of mutualistic interactions. We posit that ectomycorrhizas contribute in a species-specific but complementary manner to benefit tree N nutrition. Therefore, alterations in diversity may impact fungal-plant resource exchange and, ultimately, the role of ectomycorrhizas in tree N nutrition. Understanding the dynamics of EM functions along the mutualism-parasitism continuum in forest ecosystems is essential for the effective management of ecosystem restoration and resilience amidst climate change. KEY POINTS: • Mycorrhizal symbiosis spans a continuum from invested to appropriated benefits. • Ectomycorrhizal fungal communities exhibit a high functional diversity. • Tree nitrogen nutrition benefits from the diversity of ectomycorrhizal fungi.
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Affiliation(s)
- Rodica Pena
- Department of Sustainable Land Management, School of Agriculture, Policy and Development, University of Reading, Reading, UK.
- Department of Silviculture, Transilvania University of Brasov, Brasov, Romania.
| | - Mark Tibbett
- Department of Sustainable Land Management, School of Agriculture, Policy and Development, University of Reading, Reading, UK
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Rui R, Hei J, Li Y, Al Farraj DA, Noor F, Wang S, He X. Effects of humic acid fertilizer on the growth and microbial network stability of Panax notoginseng from the forest understorey. Sci Rep 2024; 14:17816. [PMID: 39090225 PMCID: PMC11294558 DOI: 10.1038/s41598-024-68949-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 07/30/2024] [Indexed: 08/04/2024] Open
Abstract
Humic acid (HA) can substantially enhance plant growth and improve soil health. Currently, the impacts of HA concentrations variation on the development and soil quality of Panax notoginseng (Sanqi) from the forest understorey are still unclear. In this study, exogenous HA was administered to the roots of Sanqi at varying concentrations (2, 4, and 6 ml/L). Subsequently, the diversity and community structure of bacteria and fungi were assessed through high-throughput sequencing technology. The investigation further involved analyzing the interplay among the growth of sanqi, soil edaphic factors, and the microbial network stability. Our finding revealed that moderate concentrations (4 ml/L) of HA improved the fresh/dry weight of Sanqi and NO3--N levels. Compared with control, the moderate concentrations of HA had a notable impact on the bacterial and fungal communities compositions. However, there was no significant difference in the α and β diversity of bacteria and fungi. Moreover, the abundance of beneficial bacteria (Bradyrhizobium) and harmful bacteria (Xanthobacteraceae) increased and decreased at 4 ml/L HA, respectively, while the bacterial and fungal network stability were enhanced. Structural equation model (SEM) revealed that the fresh weight of Sanqi and bacterial and fungal communities were the factors that directly affected the microbial network stability at moderate concentrations of HA. In conclusion, 4 ml/L of HA is beneficial for promoting Sanqi growth and soil quality. Our study provides a reference for increasing the yield of Sanqi and sustainable development of the Sanqi-pine agroforestry system.
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Affiliation(s)
- Rui Rui
- Key Laboratory of In-forest Resource Protection and Utilization in Yunnan Province, College of Landscape and Horticulture of Southwest, Forestry University, Kunming, 650224, China
| | - Jingying Hei
- Key Laboratory of In-forest Resource Protection and Utilization in Yunnan Province, College of Landscape and Horticulture of Southwest, Forestry University, Kunming, 650224, China
| | - Yue Li
- Key Laboratory of In-forest Resource Protection and Utilization in Yunnan Province, College of Landscape and Horticulture of Southwest, Forestry University, Kunming, 650224, China
| | - Dunia A Al Farraj
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, 11451, Riyadh, Saudi Arabia
| | - Faisal Noor
- Key Laboratory of In-forest Resource Protection and Utilization in Yunnan Province, College of Landscape and Horticulture of Southwest, Forestry University, Kunming, 650224, China
| | - Shu Wang
- Key Laboratory of In-forest Resource Protection and Utilization in Yunnan Province, College of Landscape and Horticulture of Southwest, Forestry University, Kunming, 650224, China.
- Key Laboratory of Ministry of Education on Forest Resources Conservation and Utilization in Southwest Mountainous Area, Kunming International Research and Development Center of Ecological Forestry Industry, Kunming, 650233, China.
| | - Xiahong He
- Key Laboratory of Ministry of Education on Forest Resources Conservation and Utilization in Southwest Mountainous Area, Kunming International Research and Development Center of Ecological Forestry Industry, Kunming, 650233, China.
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Hu Y, Chen J, Olesen JE, van Groenigen KJ, Hui D, He X, Chen G, Deng Q. Mycorrhizal association controls soil carbon-degrading enzyme activities and soil carbon dynamics under nitrogen addition: A systematic review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 948:175008. [PMID: 39053526 DOI: 10.1016/j.scitotenv.2024.175008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Revised: 07/16/2024] [Accepted: 07/22/2024] [Indexed: 07/27/2024]
Abstract
Recent evidence suggests that changes in carbon-degrading extracellular enzyme activities (C-EEAs) can help explain soil organic carbon (SOC) dynamics under nitrogen (N) addition. However, the factors controlling C-EEAs remain unclear, impeding the inclusion of microbial mechanisms in global C cycle models. Using meta-analysis, we show that the responses of C-EEAs to N addition were best explained by mycorrhizal association across a wide range of environmental and experimental factors. In ectomycorrhizal (ECM) dominated ecosystems, N addition suppressed C-EEAs targeting the decomposition of structurally complex macromolecules by 13.1 %, and increased SOC stocks by 5.2 %. In contrast, N addition did not affect C-EEAs and SOC stocks in arbuscular mycorrhizal (AM) dominated ecosystems. Our results indicate that earlier studies may have overestimated SOC changes under N addition in AM-dominated ecosystems and underestimated SOC changes in ECM-dominated ecosystems. Incorporating this mycorrhizal-dependent impact of EEAs on SOC dynamics into Earth system models could improve predictions of SOC dynamics under environmental changes.
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Affiliation(s)
- Yuanliu Hu
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, Guangdong 510650, China; South China National Botanical Garden, Guangzhou, Guangdong 510650, China; University of Chinese Academy of Sciences, Beijing 100039, China; Department of Agroecology, Aarhus University, 8830 Tjele, Denmark
| | - Ji Chen
- Department of Agroecology, Aarhus University, 8830 Tjele, Denmark; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, 710001 Xi'an, China; Institute of Global Environmental Change, Department of Earth & Environmental Science, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi Province 710049, China.
| | - Jørgen E Olesen
- Department of Agroecology, Aarhus University, 8830 Tjele, Denmark; Aarhus University Centre for Circular Bioeconomy, Aarhus University, 8830 Tjele, Denmark
| | - Kees Jan van Groenigen
- Department of Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Dafeng Hui
- Department of Biological Sciences, Tennessee State University, Nashville, TN 37209, USA
| | - Xinhua He
- Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City, School of Life Sciences, Southwest University, Chongqing 400715, China; School of Biological Sciences, University of Western Australia, Perth, WA 6009, Australia
| | - Guoyin Chen
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, Guangdong 510650, China; South China National Botanical Garden, Guangzhou, Guangdong 510650, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Qi Deng
- Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, Guangdong 510650, China; South China National Botanical Garden, Guangzhou, Guangdong 510650, China.
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Wang Y, Zhou Y, Tang F, Cao Q, Bai Y. Mixing of pine and arbuscular mycorrhizal tree species changed soil organic carbon storage by affecting soil microbial characteristics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172630. [PMID: 38677428 DOI: 10.1016/j.scitotenv.2024.172630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 04/01/2024] [Accepted: 04/18/2024] [Indexed: 04/29/2024]
Abstract
Pure and mixed pine forests are found all over the world. The mycorrhizal type affects soil microbial activity and carbon sequestration capacity in pure forests. However, the effects of mycorrhizal type on microbial characteristics and carbon sequestration capacity in pine mixed forests remain untested. Further, making it difficult to predict carbon storage of the conversion from pure pine forests to mixed forests at larger scales. Herein, a meta-analysis showed that the contents of soil microbial biomass, mineral-associated organic carbon, and soil organic carbon in pine mixed forests with introduced arbuscular mycorrhizal tree species (PMAM) increased by 26.41 %, 58.55 %, and 27.41 %, respectively, compared to pure pine forests, whereas those of pine mixed forests without arbuscular mycorrhizal tree species (PMEcM) remained unchanged. Furthermore, the effect size of microbial biomass, mineral-associated organic carbon and organic carbon contents in subsoil of PMAM are 56.48 %, 78.49 % and 43.05 %, respectively, which are higher than those in topsoil. The improvement of carbon sinks throughout the PMAM soil profile is positively correlated with increases in microbial biomass and mineral-associated organic carbon in subsoil, according to regression analysis and structural equation modelling. In summary, these results highlight that the positive effects of introducing arbuscular mycorrhizal tree species rather than ectomycorrhizal tree species into pure pine forests on soil microbial biomass and carbon sequestration. The positive link between microbial biomass, mineral-associated organic carbon, and soil organic carbon suggests an underlying mechanism for how soil microorganisms store carbon in pine mixed forests. Nevertheless, our findings also imply that the soil carbon pool of PMAM may be vulnerable under climate change. Based on the above findings, we propose that incorporating mycorrhizal type of tree species and soil thickness into mixed forests management and biodiversity conservation.
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Affiliation(s)
- Yaoxiong Wang
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang, China
| | - Yunchao Zhou
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang, China.
| | - Fenghua Tang
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang, China
| | - Qianbin Cao
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang, China
| | - Yunxing Bai
- Institute for Forest Resources & Environment of Guizhou, Key Laboratory of Forest Cultivation in Plateau Mountain of Guizhou Province, College of Forestry, Guizhou University, Guiyang, China
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Berrios L, Bogar GD, Bogar LM, Venturini AM, Willing CE, Del Rio A, Ansell TB, Zemaitis K, Velickovic M, Velickovic D, Pellitier PT, Yeam J, Hutchinson C, Bloodsworth K, Lipton MS, Peay KG. Ectomycorrhizal fungi alter soil food webs and the functional potential of bacterial communities. mSystems 2024; 9:e0036924. [PMID: 38717159 PMCID: PMC11237468 DOI: 10.1128/msystems.00369-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 04/11/2024] [Indexed: 06/19/2024] Open
Abstract
Most of Earth's trees rely on critical soil nutrients that ectomycorrhizal fungi (EcMF) liberate and provide, and all of Earth's land plants associate with bacteria that help them survive in nature. Yet, our understanding of how the presence of EcMF modifies soil bacterial communities, soil food webs, and root chemistry requires direct experimental evidence to comprehend the effects that EcMF may generate in the belowground plant microbiome. To this end, we grew Pinus muricata plants in soils that were either inoculated with EcMF and native forest bacterial communities or only native bacterial communities. We then profiled the soil bacterial communities, applied metabolomics and lipidomics, and linked omics data sets to understand how the presence of EcMF modifies belowground biogeochemistry, bacterial community structure, and their functional potential. We found that the presence of EcMF (i) enriches soil bacteria linked to enhanced plant growth in nature, (ii) alters the quantity and composition of lipid and non-lipid soil metabolites, and (iii) modifies plant root chemistry toward pathogen suppression, enzymatic conservation, and reactive oxygen species scavenging. Using this multi-omic approach, we therefore show that this widespread fungal symbiosis may be a common factor for structuring soil food webs.IMPORTANCEUnderstanding how soil microbes interact with one another and their host plant will help us combat the negative effects that climate change has on terrestrial ecosystems. Unfortunately, we lack a clear understanding of how the presence of ectomycorrhizal fungi (EcMF)-one of the most dominant soil microbial groups on Earth-shapes belowground organic resources and the composition of bacterial communities. To address this knowledge gap, we profiled lipid and non-lipid metabolites in soils and plant roots, characterized soil bacterial communities, and compared soils amended either with or without EcMF. Our results show that the presence of EcMF changes soil organic resource availability, impacts the proliferation of different bacterial communities (in terms of both type and potential function), and primes plant root chemistry for pathogen suppression and energy conservation. Our findings therefore provide much-needed insight into how two of the most dominant soil microbial groups interact with one another and with their host plant.
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Affiliation(s)
- Louis Berrios
- Department of Biology, Stanford University, Stanford, California, USA
| | - Glade D. Bogar
- Kellogg Biological Station, Michigan State University, Hickory Corners, Michigan, USA
| | - Laura M. Bogar
- Department of Plant Biology, University of California, Davis, Davis, California, USA
| | | | - Claire E. Willing
- Department of Biology, Stanford University, Stanford, California, USA
- School of Environmental and Forest Sciences, University of Washington, Seattle, Washington, USA
| | - Anastacia Del Rio
- Department of Biology, Stanford University, Stanford, California, USA
| | - T. Bertie Ansell
- Department of Biology, Stanford University, Stanford, California, USA
- Division of CryoEM and Bioimaging, SSRL, SLAC National Accelerator Laboratory, Menlo Park, California, USA
| | - Kevin Zemaitis
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Marija Velickovic
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Dusan Velickovic
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | | | - Jay Yeam
- Department of Biology, Stanford University, Stanford, California, USA
| | - Chelsea Hutchinson
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Kent Bloodsworth
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Mary S. Lipton
- Earth and Biological Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Kabir G. Peay
- Department of Biology, Stanford University, Stanford, California, USA
- Department of Earth System Science, Stanford University, Stanford, California, USA
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Choreño-Parra EM, Treseder KK. Mycorrhizal fungi modify decomposition: a meta-analysis. THE NEW PHYTOLOGIST 2024; 242:2763-2774. [PMID: 38605488 DOI: 10.1111/nph.19748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Accepted: 03/22/2024] [Indexed: 04/13/2024]
Abstract
It has been proposed that ectomycorrhizal fungi can reduce decomposition while arbuscular mycorrhizal fungi may enhance it. These phenomena are known as the 'Gadgil effect' and 'priming effect', respectively. However, it is unclear which one predominates globally. We evaluated whether mycorrhizal fungi decrease or increase decomposition, and identified conditions that mediate this effect. We obtained decomposition data from 43 studies (97 trials) conducted in field or laboratory settings that controlled the access of mycorrhizal fungi to substrates colonized by saprotrophs. Across studies, mycorrhizal fungi promoted decomposition of different substrates by 6.7% overall by favoring the priming effect over the Gadgil effect. However, we observed significant variation among studies. The substrate C : N ratio and absolute latitude influenced the effect of mycorrhizal fungi on decomposition and contributed to the variation. Specifically, mycorrhizal fungi increased decomposition at low substrate C : N and absolute latitude, but there was no discernable effect at high values. Unexpectedly, the effect of mycorrhizal fungi was not influenced by the mycorrhizal type. Our findings challenge previous assumptions about the universality of the Gadgil effect but highlight the potential of mycorrhizal fungi to negatively influence soil carbon storage by promoting the priming effect.
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Affiliation(s)
- Eduardo M Choreño-Parra
- Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, CA, 92697, USA
| | - Kathleen K Treseder
- Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, CA, 92697, USA
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Michaud TJ, Pearse IS, Kauserud H, Andrew CJ, Kennedy PG. Mast seeding in European beech (Fagus sylvatica L.) is associated with reduced fungal sporocarp production and community diversity. Ecol Lett 2024; 27:e14460. [PMID: 38877759 DOI: 10.1111/ele.14460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 05/21/2024] [Accepted: 05/23/2024] [Indexed: 06/16/2024]
Abstract
Mast seeding is a well-documented phenomenon across diverse forest ecosystems. While its effect on aboveground food webs has been thoroughly studied, how it impacts the soil fungi that drive soil carbon and nutrient cycling has not yet been explored. To evaluate the relationship between mast seeding and fungal resource availability, we paired a Swiss 29-year fungal sporocarp census with contemporaneous seed production for European beech (Fagus sylvatica L.). On average, mast seeding was associated with a 55% reduction in sporocarp production and a compositional community shift towards drought-tolerant taxa across both ectomycorrhizal and saprotrophic guilds. Among ectomycorrhizal fungi, traits associated with carbon cost did not explain species' sensitivity to seed production. Together, our results support a novel hypothesis that mast seeding limits annual resource availability and reproductive investment in soil fungi, creating an ecosystem 'rhythm' to forest processes that is synchronized above- and belowground.
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Affiliation(s)
- Talia J Michaud
- Department of Plant and Microbial Biology, University of Minnesota, St. Paul, Minnesota, USA
| | - Ian S Pearse
- U.S. Geological Survey, Fort Collins Science Center, Fort Collins, Colorado, USA
| | | | | | - Peter G Kennedy
- Department of Plant and Microbial Biology, University of Minnesota, St. Paul, Minnesota, USA
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Cao T, Shi M, Zhang J, Ji H, Wang X, Sun J, Chen Z, Li Q, Song X. Nitrogen fertilization practices alter microbial communities driven by clonal integration in Moso bamboo. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 924:171581. [PMID: 38461973 DOI: 10.1016/j.scitotenv.2024.171581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/03/2024] [Accepted: 03/06/2024] [Indexed: 03/12/2024]
Abstract
Nitrogen (N) fertilization is crucial for maintaining plant productivity. Clonal plants can share resources between connected ramets through clonal integration influencing microbial communities and regulating soil biogeochemical cycling, especially in the rhizosphere. However, the effect of various N fertilization practices on microbial communities in the rhizosphere of clonal ramets remain unknown. In this study, clonal fragments of Moso bamboo (Phyllostachys edulis), consisting of a parent ramet, an offspring ramet, and an interconnecting rhizome, were established in the field. NH4NO3 solution was applied to the parent, offspring ramets or rhizomes to investigate the effect of fertilization practices on the structure and function of rhizosphere microbial communities. The differences in N availability, microbial biomass and community composition, and abundance of nitrifying genes among rhizosphere soils of ramets gradually decreased during the rapid growth of Moso bamboo, irrespective of fertilization practice. The soil N availability variation, particularly in NO3-, caused by fertilization practices altered the rhizosphere microbial community. Soil N availability and stable microbial biomass N in parent fertilization were the highest, being 9.0 % and 18.7 %, as well as 60.8 % and 90.4 % higher than rhizome and offspring fertilizations, respectively. The microbial network nodes and links in rhizome fertilization were 1.8 and 7.5 times higher than in parent and offspring fertilization, respectively. However, the diversity of bacterial community and abundance of nitrifying and denitrifying genes were the highest in offspring fertilization among three practices, which may be associated with increased N loss. Collectively, the rhizosphere microbial community characteristics depended on fertilization practices by altering the clonal integration of N in Moso bamboo. Parent and rhizome fertilization were favorable for N retention in plant-soil system and resulted in more stable microbial functions than offspring fertilization. Our findings provide new insights into precision fertilization for the sustainable Moso bamboo forest management.
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Affiliation(s)
- Tingting Cao
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Man Shi
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Junbo Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Hangxiang Ji
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Xiao Wang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Jilei Sun
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Zhenxiong Chen
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Quan Li
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China
| | - Xinzhang Song
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou 311300, China; College of Landscape Architecture and Forestry, Qingdao Agricultural University, Qingdao 266109, China.
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10
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Singavarapu B, Ul Haq H, Darnstaedt F, Nawaz A, Beugnon R, Cesarz S, Eisenhauer N, Du J, Xue K, Wang Y, Bruelheide H, Wubet T. Influence of tree mycorrhizal type, tree species identity, and diversity on forest root-associated mycobiomes. THE NEW PHYTOLOGIST 2024; 242:1691-1703. [PMID: 38659111 DOI: 10.1111/nph.19722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 02/20/2024] [Indexed: 04/26/2024]
Abstract
Understanding the complex interactions between trees and fungi is crucial for forest ecosystem management, yet the influence of tree mycorrhizal types, species identity, and diversity on tree-tree interactions and their root-associated fungal communities remains poorly understood. Our study addresses this gap by investigating root-associated fungal communities of different arbuscular mycorrhizal (AM) and ectomycorrhizal (EcM) tree species pairs (TSPs) in a subtropical tree diversity experiment, spanning monospecific, two-species, and multi-species mixtures, utilizing Illumina sequencing of the ITS2 region. The study reveals that tree mycorrhizal type significantly impacts the alpha diversity of root-associated fungi in monospecific stands. Meanwhile, tree species identity's influence is modulated by overall tree diversity. Tree-related variables and spatial distance emerged as major drivers of variations in fungal community composition. Notably, in multi-species mixtures, compositional differences between root fungal communities of AM and EcM trees diminish, indicating a convergence of fungal communities irrespective of mycorrhizal type. Interestingly, dual mycorrhizal fungal communities were observed in these multi-species mixtures. This research underscores the pivotal role of mycorrhizal partnerships and the interplay of biotic and abiotic factors in shaping root fungal communities, particularly in varied tree diversity settings, and its implications for effective forest management and biodiversity conservation.
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Affiliation(s)
- Bala Singavarapu
- Department of Community Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, D-06120, Halle (Saale), Germany
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany
| | - Hafeez Ul Haq
- Department of Community Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, D-06120, Halle (Saale), Germany
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany
| | - Friedrich Darnstaedt
- Department of Community Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, D-06120, Halle (Saale), Germany
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle, Germany
| | - Ali Nawaz
- Department of Community Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, D-06120, Halle (Saale), Germany
- Department of Digital Health Sciences and Biomedicine, School of Life Sciences, University of Siegen, Am Eichenhang 50, 57076, Siegen, Germany
| | - Rémy Beugnon
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany
- CEFE, Univ Montpellier, CNRS, EPHE, IRD, 1919, route de Mende, F-34293, Montpellier Cedex 5, France
- Leipzig Institute for Meteorology, Universität Leipzig, Stephanstraße 3, 04103, Leipzig, Germany
| | - Simone Cesarz
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany
- Institute of Biology, Leipzig University, Puschstrasse 4, 04103, Leipzig, Germany
| | - Nico Eisenhauer
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany
- Institute of Biology, Leipzig University, Puschstrasse 4, 04103, Leipzig, Germany
| | - Jianqing Du
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
- Beijing Yanshan Earth Critical Zone National Research Station, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Kai Xue
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
- Beijing Yanshan Earth Critical Zone National Research Station, University of Chinese Academy of Sciences, Beijing, 101408, China
| | - Yanfen Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
- Beijing Yanshan Earth Critical Zone National Research Station, University of Chinese Academy of Sciences, Beijing, 101408, China
- State Key Laboratory of Tibetan Plateau Earth System, Environment and Resources, Chinese Academy of Sciences, 100101, Beijing, China
| | - Helge Bruelheide
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany
| | - Tesfaye Wubet
- Department of Community Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, D-06120, Halle (Saale), Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany
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11
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Auer L, Buée M, Fauchery L, Lombard V, Barry KW, Clum A, Copeland A, Daum C, Foster B, LaButti K, Singan V, Yoshinaga Y, Martineau C, Alfaro M, Castillo FJ, Imbert JB, Ramírez L, Castanera R, Pisabarro AG, Finlay R, Lindahl B, Olson A, Séguin A, Kohler A, Henrissat B, Grigoriev IV, Martin FM. Metatranscriptomics sheds light on the links between the functional traits of fungal guilds and ecological processes in forest soil ecosystems. THE NEW PHYTOLOGIST 2024; 242:1676-1690. [PMID: 38148573 DOI: 10.1111/nph.19471] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 11/23/2023] [Indexed: 12/28/2023]
Abstract
Soil fungi belonging to different functional guilds, such as saprotrophs, pathogens, and mycorrhizal symbionts, play key roles in forest ecosystems. To date, no study has compared the actual gene expression of these guilds in different forest soils. We used metatranscriptomics to study the competition for organic resources by these fungal groups in boreal, temperate, and Mediterranean forest soils. Using a dedicated mRNA annotation pipeline combined with the JGI MycoCosm database, we compared the transcripts of these three fungal guilds, targeting enzymes involved in C- and N mobilization from plant and microbial cell walls. Genes encoding enzymes involved in the degradation of plant cell walls were expressed at a higher level in saprotrophic fungi than in ectomycorrhizal and pathogenic fungi. However, ectomycorrhizal and saprotrophic fungi showed similarly high expression levels of genes encoding enzymes involved in fungal cell wall degradation. Transcripts for N-related transporters were more highly expressed in ectomycorrhizal fungi than in other groups. We showed that ectomycorrhizal and saprotrophic fungi compete for N in soil organic matter, suggesting that their interactions could decelerate C cycling. Metatranscriptomics provides a unique tool to test controversial ecological hypotheses and to better understand the underlying ecological processes involved in soil functioning and carbon stabilization.
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Affiliation(s)
- Lucas Auer
- Université de Lorraine, INRAE, UMR Interactions Arbres-Microorganismes, Nancy, F-54000, France
| | - Marc Buée
- Université de Lorraine, INRAE, UMR Interactions Arbres-Microorganismes, Nancy, F-54000, France
| | - Laure Fauchery
- Université de Lorraine, INRAE, UMR Interactions Arbres-Microorganismes, Nancy, F-54000, France
| | - Vincent Lombard
- Architecture et Fonction des Macromolécules Biologiques, CNRS and Aix-Marseille Université, Marseille, 13288, France
- INRAE, USC1408 Architecture et Fonction des Macromolécules Biologiques, Marseille, 13009, France
| | - Kerry W Barry
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Alicia Clum
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Alex Copeland
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Chris Daum
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Brian Foster
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Kurt LaButti
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Vasanth Singan
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Yuko Yoshinaga
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Christine Martineau
- Laurentian Forestry Centre, Natural Resources Canada, Canadian Forest Service, Quebec, G1V4C7, QC, Canada
| | - Manuel Alfaro
- Institute for Multidisciplinary Research in Applied Biology (IMAB), Public University of Navarra (UPNA), Pamplona, 31006, Spain
| | - Federico J Castillo
- Institute for Multidisciplinary Research in Applied Biology (IMAB), Public University of Navarra (UPNA), Pamplona, 31006, Spain
| | - J Bosco Imbert
- Institute for Multidisciplinary Research in Applied Biology (IMAB), Public University of Navarra (UPNA), Pamplona, 31006, Spain
| | - Lucia Ramírez
- Institute for Multidisciplinary Research in Applied Biology (IMAB), Public University of Navarra (UPNA), Pamplona, 31006, Spain
| | - Raúl Castanera
- Institute for Multidisciplinary Research in Applied Biology (IMAB), Public University of Navarra (UPNA), Pamplona, 31006, Spain
| | - Antonio G Pisabarro
- Institute for Multidisciplinary Research in Applied Biology (IMAB), Public University of Navarra (UPNA), Pamplona, 31006, Spain
| | - Roger Finlay
- Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Uppsala, 75007, Sweden
| | - Björn Lindahl
- Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Uppsala, 75007, Sweden
| | - Ake Olson
- Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Uppsala, 75007, Sweden
| | - Armand Séguin
- Laurentian Forestry Centre, Natural Resources Canada, Canadian Forest Service, Quebec, G1V4C7, QC, Canada
| | - Annegret Kohler
- Université de Lorraine, INRAE, UMR Interactions Arbres-Microorganismes, Nancy, F-54000, France
| | - Bernard Henrissat
- DTU Bioengineering, Denmarks Tekniske Universitet, Copenhagen, 2800, Denmark
- Department of Biological Sciences, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Igor V Grigoriev
- US Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, CA, 94720, USA
| | - Francis M Martin
- Université de Lorraine, INRAE, UMR Interactions Arbres-Microorganismes, Nancy, F-54000, France
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12
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Zotti M. Checklist of Macrofungi Associated with Nine Different Habitats of Taburno-Camposauro Massif in Campania, Southern Italy. J Fungi (Basel) 2024; 10:275. [PMID: 38667946 PMCID: PMC11050982 DOI: 10.3390/jof10040275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/25/2024] [Accepted: 04/03/2024] [Indexed: 04/28/2024] Open
Abstract
The checklist serves as an informative method for evaluating the diversity, geography, and ecology of established and reproducing macrofungi. Additionally, considering macrofungi as bioindicator species, their census should be incorporated into efforts to monitor the state of health of ecosystems and directly applied to conservation policies. Between 2019 and 2023, a census of macrofungal species was conducted in Taburno-Camposauro Regional Park (Campania, Italy) across nine distinct habitats. A total of 453 fungal taxa were identified, including several new records for the Campania region. The fungal diversity exhibited significant variations based on the dominant plant species in each habitat. Fagacean tree species and Carpinus spp. shared similar fungal communities. Equally, coniferous tree species displayed a comparable fungal composition. In Abies alba and mixed broad-leaved forests, low levels of ectomycorrhizal taxa were observed alongside a concurrent increase in saprotrophs, indicating a disturbed habitat and a reduction in the Gadgil effect. Notably, lower fungal diversity was documented in the grassland habitat, suggesting the potential implications of wildlife imbalance and excessive grazing. The provided checklist constitutes a valuable resource for local management authorities, providing insights to formulate specific management policies.
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Affiliation(s)
- Maurizio Zotti
- Department of Agricultural Sciences, University of Naples Federico II, Via Università, 100, 80055 Portici, Italy
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13
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Maitra P, Hrynkiewicz K, Szuba A, Jagodziński AM, Al-Rashid J, Mandal D, Mucha J. Metabolic niches in the rhizosphere microbiome: dependence on soil horizons, root traits and climate variables in forest ecosystems. FRONTIERS IN PLANT SCIENCE 2024; 15:1344205. [PMID: 38645395 PMCID: PMC11026606 DOI: 10.3389/fpls.2024.1344205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Accepted: 03/18/2024] [Indexed: 04/23/2024]
Abstract
Understanding belowground plant-microbial interactions is important for biodiversity maintenance, community assembly and ecosystem functioning of forest ecosystems. Consequently, a large number of studies were conducted on root and microbial interactions, especially in the context of precipitation and temperature gradients under global climate change scenarios. Forests ecosystems have high biodiversity of plants and associated microbes, and contribute to major primary productivity of terrestrial ecosystems. However, the impact of root metabolites/exudates and root traits on soil microbial functional groups along these climate gradients is poorly described in these forest ecosystems. The plant root system exhibits differentiated exudation profiles and considerable trait plasticity in terms of root morphological/phenotypic traits, which can cause shifts in microbial abundance and diversity. The root metabolites composed of primary and secondary metabolites and volatile organic compounds that have diverse roles in appealing to and preventing distinct microbial strains, thus benefit plant fitness and growth, and tolerance to abiotic stresses such as drought. Climatic factors significantly alter the quantity and quality of metabolites that forest trees secrete into the soil. Thus, the heterogeneities in the rhizosphere due to different climate drivers generate ecological niches for various microbial assemblages to foster beneficial rhizospheric interactions in the forest ecosystems. However, the root exudations and microbial diversity in forest trees vary across different soil layers due to alterations in root system architecture, soil moisture, temperature, and nutrient stoichiometry. Changes in root system architecture or traits, e.g. root tissue density (RTD), specific root length (SRL), and specific root area (SRA), impact the root exudation profile and amount released into the soil and thus influence the abundance and diversity of different functional guilds of microbes. Here, we review the current knowledge about root morphological and functional (root exudation) trait changes that affect microbial interactions along drought and temperature gradients. This review aims to clarify how forest trees adapt to challenging environments by leveraging their root traits to interact beneficially with microbes. Understanding these strategies is vital for comprehending plant adaptation under global climate change, with significant implications for future research in plant biodiversity conservation, particularly within forest ecosystems.
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Affiliation(s)
- Pulak Maitra
- Institute of Dendrology, Polish Academy of Sciences, Kórnik, Poland
| | - Katarzyna Hrynkiewicz
- Department of Microbiology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Toruń, Poland
| | - Agnieszka Szuba
- Institute of Dendrology, Polish Academy of Sciences, Kórnik, Poland
| | - Andrzej M. Jagodziński
- Institute of Dendrology, Polish Academy of Sciences, Kórnik, Poland
- Department of Game Management and Forest Protection, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, Poznań, Poland
| | - Jubair Al-Rashid
- Tianjin Institute of Industrial Biotechnology, University of Chinese Academy of Sciences, Tianjin, China
| | - Dipa Mandal
- Institute of Microbiology, University of Chinese Academy of Sciences, Beijing, China
| | - Joanna Mucha
- Institute of Dendrology, Polish Academy of Sciences, Kórnik, Poland
- Department of Forest Entomology and Pathology, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, Poznań, Poland
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14
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Wang C, Kuzyakov Y. Rhizosphere engineering for soil carbon sequestration. TRENDS IN PLANT SCIENCE 2024; 29:447-468. [PMID: 37867041 DOI: 10.1016/j.tplants.2023.09.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 08/10/2023] [Accepted: 09/30/2023] [Indexed: 10/24/2023]
Abstract
The rhizosphere is the central hotspot of water and nutrient uptake by plants, rhizodeposition, microbial activities, and plant-soil-microbial interactions. The plasticity of plants offers possibilities to engineer the rhizosphere to mitigate climate change. We define rhizosphere engineering as targeted manipulation of plants, soil, microorganisms, and management to shift rhizosphere processes for specific aims [e.g., carbon (C) sequestration]. The rhizosphere components can be engineered by agronomic, physical, chemical, biological, and genomic approaches. These approaches increase plant productivity with a special focus on C inputs belowground, increase microbial necromass production, protect organic compounds and necromass by aggregation, and decrease C losses. Finally, we outline multifunctional options for rhizosphere engineering: how to boost C sequestration, increase soil health, and mitigate global change effects.
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Affiliation(s)
- Chaoqun Wang
- Biogeochemistry of Agroecosystems, University of Goettingen, 37077 Goettingen, Germany.
| | - Yakov Kuzyakov
- Department of Soil Science of Temperate Ecosystems, University of Goettingen, 37077 Goettingen, Germany.
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15
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Edwards JD, Krichels AH, Seyfried GS, Dalling J, Kent AD, Yang WH. Soil microbial community response to ectomycorrhizal dominance in diverse neotropical montane forests. MYCORRHIZA 2024; 34:95-105. [PMID: 38183463 PMCID: PMC10998807 DOI: 10.1007/s00572-023-01134-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 12/19/2023] [Indexed: 01/08/2024]
Abstract
Ectomycorrhizal (EM) associations can promote the dominance of tree species in otherwise diverse tropical forests. These EM associations between trees and their fungal mutualists have important consequences for soil organic matter cycling, yet the influence of these EM-associated effects on surrounding microbial communities is not well known, particularly in neotropical forests. We examined fungal and prokaryotic community composition in surface soil samples from mixed arbuscular mycorrhizal (AM) and ectomycorrhizal (EM) stands as well as stands dominated by EM-associated Oreomunnea mexicana (Juglandaceae) in four watersheds differing in soil fertility in the Fortuna Forest Reserve, Panama. We hypothesized that EM-dominated stands would support distinct microbial community assemblages relative to the mixed AM-EM stands due to differences in carbon and nitrogen cycling associated with the dominance of EM trees. We expected that this microbiome selection in EM-dominated stands would lead to lower overall microbial community diversity and turnover, with tighter correspondence between general fungal and prokaryotic communities. We measured fungal and prokaryotic community composition via high-throughput Illumina sequencing of the ITS2 (fungi) and 16S rRNA (prokaryotic) gene regions. We analyzed differences in alpha and beta diversity between forest stands associated with different mycorrhizal types, as well as the relative abundance of fungal functional groups and various microbial taxa. We found that fungal and prokaryotic community composition differed based on stand mycorrhizal type. There was lower prokaryotic diversity and lower relative abundance of fungal saprotrophs and pathogens in EM-dominated than AM-EM mixed stands. However, contrary to our prediction, there was lower homogeneity for fungal communities in EM-dominated stands compared to mixed AM-EM stands. Overall, we demonstrate that EM-dominated tropical forest stands have distinct soil microbiomes relative to surrounding diverse forests, suggesting that EM fungi may filter microbial functional groups in ways that could potentially influence plant performance or ecosystem function.
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Affiliation(s)
- Joseph D Edwards
- Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, USA.
| | - Alexander H Krichels
- USDA Forest Service, Rocky Mountain Research Station, Albuquerque, NM, 87102, USA
| | - Georgia S Seyfried
- Department of Forest Ecology and Resource Management, Oregon State University, Corvallis, OR, 97331, USA
| | - James Dalling
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Angela D Kent
- Department of Natural Resources and Environmental Science, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Wendy H Yang
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
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16
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Forsmark B, Bizjak T, Nordin A, Rosenstock NP, Wallander H, Gundale MJ. Shifts in microbial community composition and metabolism correspond with rapid soil carbon accumulation in response to 20 years of simulated nitrogen deposition. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 918:170741. [PMID: 38325494 DOI: 10.1016/j.scitotenv.2024.170741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/21/2023] [Accepted: 02/04/2024] [Indexed: 02/09/2024]
Abstract
Anthropogenic nitrogen (N) deposition and fertilization in boreal forests frequently reduces decomposition and soil respiration and enhances C storage in the topsoil. This enhancement of the C sink can be as strong as the aboveground biomass response to N additions and has implications for the global C cycle, but the mechanisms remain elusive. We hypothesized that this effect would be associated with a shift in the microbial community and its activity, and particularly by fungal taxa reported to be capable of lignin degradation and organic N acquisition. We sampled the organic layer below the intact litter of a Norway spruce (Picea abies (L.) Karst) forest in northern Sweden after 20 years of annual N additions at low (12.5 kg N ha-1 yr-1) and high (50 kg N ha-1 yr-1) rates. We measured microbial biomass using phospholipid fatty-acid analysis (PLFA) and ergosterol measurements and used ITS metagenomics to profile the fungal community of soil and fine-roots. We probed the metabolic activity of the soil community by measuring the activity of extracellular enzymes and evaluated its relationships with the most N responsive soil fungal species. Nitrogen addition decreased the abundance of fungal PLFA markers and changed the fungal community in humus and fine-roots. Specifically, the humus community changed in part due to a shift from Oidiodendron pilicola, Cenococcum geophilum, and Cortinarius caperatus to Tylospora fibrillosa and Russula griseascens. These microbial community changes were associated with decreased activity of Mn-peroxidase and peptidase, and an increase in the activity of C acquiring enzymes. Our results show that the rapid accumulation of C in the humus layer frequently observed in areas with high N deposition is consistent with a shift in microbial metabolism, where decomposition associated with organic N acquisition is downregulated when inorganic N forms are readily available.
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Affiliation(s)
- Benjamin Forsmark
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden.
| | - Tinkara Bizjak
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden
| | - Annika Nordin
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden
| | - Nicholas P Rosenstock
- Center for Environmental and Climate Research, Lund University, SE-223 62 Lund, Sweden
| | - Håkan Wallander
- Department of Microbial Ecology, Lund University, SE-223 62 Lund, Sweden
| | - Michael J Gundale
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden
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17
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Anthony MA, Tedersoo L, De Vos B, Croisé L, Meesenburg H, Wagner M, Andreae H, Jacob F, Lech P, Kowalska A, Greve M, Popova G, Frey B, Gessler A, Schaub M, Ferretti M, Waldner P, Calatayud V, Canullo R, Papitto G, Marinšek A, Ingerslev M, Vesterdal L, Rautio P, Meissner H, Timmermann V, Dettwiler M, Eickenscheidt N, Schmitz A, Van Tiel N, Crowther TW, Averill C. Fungal community composition predicts forest carbon storage at a continental scale. Nat Commun 2024; 15:2385. [PMID: 38493170 PMCID: PMC10944544 DOI: 10.1038/s41467-024-46792-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/11/2024] [Indexed: 03/18/2024] Open
Abstract
Forest soils harbor hyper-diverse microbial communities which fundamentally regulate carbon and nutrient cycling across the globe. Directly testing hypotheses on how microbiome diversity is linked to forest carbon storage has been difficult, due to a lack of paired data on microbiome diversity and in situ observations of forest carbon accumulation and storage. Here, we investigated the relationship between soil microbiomes and forest carbon across 238 forest inventory plots spanning 15 European countries. We show that the composition and diversity of fungal, but not bacterial, species is tightly coupled to both forest biotic conditions and a seven-fold variation in tree growth rates and biomass carbon stocks when controlling for the effects of dominant tree type, climate, and other environmental factors. This linkage is particularly strong for symbiotic endophytic and ectomycorrhizal fungi known to directly facilitate tree growth. Since tree growth rates in this system are closely and positively correlated with belowground soil carbon stocks, we conclude that fungal composition is a strong predictor of overall forest carbon storage across the European continent.
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Affiliation(s)
- Mark A Anthony
- Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland.
- Swiss Federal Institute for Forests, Snow, and the Landscape Research (WSL), Birmensdorf, Switzerland.
- Center for Microbiology and Environmental Systems Science, University of Vienna, Vienna, Austria.
| | - Leho Tedersoo
- Mycology and Microbiology Center, University of Tartu, Tartu, Estonia
| | - Bruno De Vos
- Environment & Climate Unit, Research Institute for Nature and Forest, Geraardsbergen, Belgium
| | - Luc Croisé
- French National Forest Office, Fontainebleau, France
| | | | - Markus Wagner
- Northwest German Forest Research Institute, Göttingen, Germany
| | | | - Frank Jacob
- Sachsenforst State Forest, Pirna OT Graupa, Germany
| | - Paweł Lech
- Forest Research Institute, Sękocin Stary, Poland
| | | | - Martin Greve
- Research Institute for Forest Ecology and Forestry, Trippstadt, Germany
| | - Genoveva Popova
- Executive Environmental Agency at the Ministry of Environment and Water, Sofia, Bulgaria
| | - Beat Frey
- Swiss Federal Institute for Forests, Snow, and the Landscape Research (WSL), Birmensdorf, Switzerland
| | - Arthur Gessler
- Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland
- Swiss Federal Institute for Forests, Snow, and the Landscape Research (WSL), Birmensdorf, Switzerland
| | - Marcus Schaub
- Swiss Federal Institute for Forests, Snow, and the Landscape Research (WSL), Birmensdorf, Switzerland
| | - Marco Ferretti
- Swiss Federal Institute for Forests, Snow, and the Landscape Research (WSL), Birmensdorf, Switzerland
| | - Peter Waldner
- Swiss Federal Institute for Forests, Snow, and the Landscape Research (WSL), Birmensdorf, Switzerland
| | | | - Roberto Canullo
- Department of Plant Diversity and Ecosystem Management, University of Camerino, Camerino, Italy
| | - Giancarlo Papitto
- Arma dei Carabinieri Forestry Environmental and Agri-food protection Units, Rome, Italy
| | | | - Morten Ingerslev
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Frederiksberg C, Denmark
| | - Lars Vesterdal
- Department of Geosciences and Natural Resource Management, University of Copenhagen, Frederiksberg C, Denmark
| | - Pasi Rautio
- Natural Resources Institute Finland, Rovaniemi, Finland
| | - Helge Meissner
- Division of Forest and Forest Resources, Norwegian Institute of Bioeconomy Research, Ås, Norway
| | - Volkmar Timmermann
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research, Ås, Norway
| | - Mike Dettwiler
- Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland
| | - Nadine Eickenscheidt
- State Agency for Nature, Environment and Consumer Protection of North Rhine-Westphalia, Recklinghausen, Germany
| | - Andreas Schmitz
- State Agency for Nature, Environment and Consumer Protection of North Rhine-Westphalia, Recklinghausen, Germany
- Thuenen Institut of Forest Ecosystems, 16225, Eberswalde, Germany
| | - Nina Van Tiel
- Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland
- Environmetnal Computational Science and Earth Observation Laboratory, EPFL, Lausanne, Switzerland
| | - Thomas W Crowther
- Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland
| | - Colin Averill
- Department of Environmental Systems Science, ETH Zürich, Zürich, Switzerland
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18
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Zhang Y, Yan Y, Huang JG, Wang M. Interguild fungal competition in litter and soil inversely modulate microbial necromass accumulation during Loess Plateau forest succession. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:170259. [PMID: 38253096 DOI: 10.1016/j.scitotenv.2024.170259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/16/2024] [Accepted: 01/16/2024] [Indexed: 01/24/2024]
Abstract
Microbial interactions determine ecosystem carbon (C) and nutrient cycling, yet it remains unclear how interguild fungal interactions modulate microbial residue contribution to soil C pools (SOC) during forest succession. Here, we present a region-wide investigation of the relative dominance of saprophytic versus symbiotic fungi in litter and soil compartments, exploring their linkages to soil microbial residue pools and potential drivers along a chronosequence of secondary Chinese pine (Pinus tabulaeformis) forests on the Loess Plateau. Despite minor changes in C and nitrogen (N) stocks in the litter or soil layers across successional stages, we found significantly lower soil phosphorus (P) stocks, higher ratios of soil C: N, soil N: P and soil C: P but lower ratios of litter C: N and litter C: P in old (>75 years) than young stands (<30 years). Pine stand development altered the saprotroph: symbiotroph ratios of fungal communities to favor the soil symbiotrophs versus the litter saprotrophs. The dominance of saprotrophs in litter is positively related to microbial necromass contribution to SOC, which is negatively related to the dominance of symbiotrophs in soils. Antagonistic interguild fungal competition in litter and soil layers, in conjunction with increased fungal but decreased bacterial necromass contribution to SOC, jointly contribute to unchanged total necromass contribution to SOC with stand development. The saprotroph: symbiotroph ratios in litter and soil layers are mainly driven by soil P stocks and stand parameters (e.g., stand age and slope), respectively, while substrate stoichiometries primarily regulate microbial necromass accumulation and fungal: bacterial necromass ratios. These results provide novel insights into how microbial interactions at local spatial scales modulate temporal changes in SOC pools, with management implications for mitigating regional land degradation.
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Affiliation(s)
- Yaling Zhang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou 510650, China
| | - Yuqi Yan
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou 510650, China; University of Chinese Academy of Sciences, Yanqihu East Road, Huairou District, Beijing 101400, China
| | - Jian-Guo Huang
- Key Laboratory of Conservation Biology for Endangered Wildlife of the Ministry of Education, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Minhuang Wang
- School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
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19
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Liu Y, Jin X, Huang S, Liu Y, Kong Z, Wu L, Ge G. Co-Occurrence Patterns of Soil Fungal and Bacterial Communities in Subtropical Forest-Transforming Areas. Curr Microbiol 2024; 81:64. [PMID: 38225342 DOI: 10.1007/s00284-023-03608-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 09/30/2021] [Indexed: 01/17/2024]
Abstract
Soil microbial communities are engineers of important biogeochemical processes and play a critical role in regulating the functions and stability of forest ecosystem. However, few studies have assessed microbial interactions during forest conversion, which is essential to the understanding of the structure and function of soil microbiome. Herein, we investigated the co-occurrence network pattern and putative functions of fungal and bacterial communities in forest-transforming areas (five sites that cover the typical forests) using high-throughput sequencing of the ITS genes and 16S rRNA. Our study showed that the bacterial network had higher average connectivity and more links than fungal network, which might indicate that the bacterial community had more complex internal interactions compared with fungal one. Alphaproteobacteria_unclassfied, Telmatobacter, 0319-6A21 and Latescibacteria_unclassfied were the keystone taxa in bacterial network. For the fungal community network, the keystone taxon was Ceratobasidium. A structural equation model indicated that the available potassium and total organic carbon were important soil environmental factors, which affected all microbial modules, including bacterial and fungi. Total nitrogen had significant effects on the bacterial module that contains a relatively rich group of nitrogen cycling functions, and pH influenced the bacterial module which have higher potential functions of carbon cycling. And, more fungal modules were directly affected by forest structure (S Tree) compared with bacterial ones. This study provides new insights into our understanding of the feedback of underground creatures to forest conversion and highlights the importance of microbial modules in the nutrient cycling process.
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Affiliation(s)
- Yajun Liu
- School of Life Science, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
| | - Xin Jin
- School of Life Science, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
| | - Shihao Huang
- School of Life Science, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
| | - Yizhen Liu
- School of Life Science, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
| | - Zhaoyu Kong
- School of Life Science, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
| | - Lan Wu
- School of Life Science, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China.
| | - Gang Ge
- School of Life Science, Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, 330031, China
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20
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Netherway T, Bengtsson J, Buegger F, Fritscher J, Oja J, Pritsch K, Hildebrand F, Krab EJ, Bahram M. Pervasive associations between dark septate endophytic fungi with tree root and soil microbiomes across Europe. Nat Commun 2024; 15:159. [PMID: 38167673 PMCID: PMC10761831 DOI: 10.1038/s41467-023-44172-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 12/04/2023] [Indexed: 01/05/2024] Open
Abstract
Trees interact with a multitude of microbes through their roots and root symbionts such as mycorrhizal fungi and root endophytes. Here, we explore the role of fungal root symbionts as predictors of the soil and root-associated microbiomes of widespread broad-leaved trees across a European latitudinal gradient. Our results suggest that, alongside factors such as climate, soil, and vegetation properties, root colonization by ectomycorrhizal, arbuscular mycorrhizal, and dark septate endophytic fungi also shapes tree-associated microbiomes. Notably, the structure of root and soil microbiomes across our sites is more strongly and consistently associated with dark septate endophyte colonization than with mycorrhizal colonization and many abiotic factors. Root colonization by dark septate endophytes also has a consistent negative association with the relative abundance and diversity of nutrient cycling genes. Our study not only indicates that root-symbiotic interactions are an important factor structuring soil communities and functions in forest ecosystems, but also that the hitherto less studied dark septate endophytes are likely to be central players in these interactions.
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Affiliation(s)
- Tarquin Netherway
- Department of Ecology, Swedish University of Agricultural Sciences, Ulls väg 16, 756 51, Uppsala, Sweden.
| | - Jan Bengtsson
- Department of Ecology, Swedish University of Agricultural Sciences, Ulls väg 16, 756 51, Uppsala, Sweden
| | - Franz Buegger
- Research Unit for Environmental Simulation (EUS), German Research Center for Environmental Health, Helmholtz Zentrum München, Ingolstaedter Landstr. 1, 85764, Neuherberg, Germany
| | - Joachim Fritscher
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, NR4 7UQ, UK
- Digital Biology, Earlham Institute, Norwich Research Park, Norwich, Norfolk, NR4 7UQ, UK
| | - Jane Oja
- Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St, Tartu, Estonia
| | - Karin Pritsch
- Research Unit for Environmental Simulation (EUS), German Research Center for Environmental Health, Helmholtz Zentrum München, Ingolstaedter Landstr. 1, 85764, Neuherberg, Germany
| | - Falk Hildebrand
- Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, NR4 7UQ, UK
- Digital Biology, Earlham Institute, Norwich Research Park, Norwich, Norfolk, NR4 7UQ, UK
| | - Eveline J Krab
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Lennart Hjelms väg 9, 750 07, Uppsala, Sweden
| | - Mohammad Bahram
- Department of Ecology, Swedish University of Agricultural Sciences, Ulls väg 16, 756 51, Uppsala, Sweden
- Department of Botany, Institute of Ecology and Earth Sciences, University of Tartu, 40 Lai St, Tartu, Estonia
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21
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Ridgeway J, Kane J, Morrissey E, Starcher H, Brzostek E. Roots selectively decompose litter to mine nitrogen and build new soil carbon. Ecol Lett 2024; 27:e14331. [PMID: 37898561 DOI: 10.1111/ele.14331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 09/18/2023] [Accepted: 10/02/2023] [Indexed: 10/30/2023]
Abstract
Plant-microbe interactions in the rhizosphere shape carbon and nitrogen cycling in soil organic matter (SOM). However, there is conflicting evidence on whether these interactions lead to a net loss or increase of SOM. In part, this conflict is driven by uncertainty in how living roots and microbes alter SOM formation or loss in the field. To address these uncertainties, we traced the fate of isotopically labelled litter into SOM using root and fungal ingrowth cores incubated in a Miscanthus x giganteus field. Roots stimulated litter decomposition, but balanced this loss by transferring carbon into aggregate associated SOM. Further, roots selectively mobilized nitrogen from litter without additional carbon release. Overall, our findings suggest that roots mine litter nitrogen and protect soil carbon.
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Affiliation(s)
- Joanna Ridgeway
- Department of Biology, West Virginia University, Morgantown, West Virginia, USA
- Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Jennifer Kane
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia, USA
| | - Ember Morrissey
- Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia, USA
| | - Hayden Starcher
- Department of Biology, West Virginia University, Morgantown, West Virginia, USA
| | - Edward Brzostek
- Department of Biology, West Virginia University, Morgantown, West Virginia, USA
- Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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22
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Guo L, Deng M, Li X, Schmid B, Huang J, Wu Y, Peng Z, Yang L, Liu L. Evolutionary and ecological forces shape nutrient strategies of mycorrhizal woody plants. Ecol Lett 2024; 27:e14330. [PMID: 37866881 DOI: 10.1111/ele.14330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 10/02/2023] [Accepted: 10/04/2023] [Indexed: 10/24/2023]
Abstract
The associations of arbuscular mycorrhizal (AM) or ectomycorrhiza (EcM) fungi with plants have sequentially evolved and significantly contributed to enhancing plant nutrition. Nonetheless, how evolutionary and ecological forces drive nutrient acquisition strategies of AM and EcM woody plants remains poorly understood. Our global analysis of woody species revealed that, over divergence time, AM woody plants evolved faster nitrogen mineralization rates without changes in nitrogen resorption. However, EcM woody plants exhibited an increase in nitrogen mineralization but a decrease in nitrogen resorption, indicating a shift towards a more inorganic nutrient economy. Despite this alteration, when evaluating present-day woody species, AM woody plants still display faster nitrogen mineralization and lower nitrogen resorption than EcM woody plants. This inorganic nutrient economy allows AM woody plants to thrive in warm environments with a faster litter decomposition rate. Our findings indicate that the global pattern of nutrient acquisition strategies in mycorrhizal plants is shaped by the interplay between phylogeny and climate.
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Affiliation(s)
- Lulu Guo
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- China National Botanical Garden, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Meifeng Deng
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- China National Botanical Garden, Beijing, China
| | - Xuefei Li
- Faculty of Science, Institute for Atmospheric and Earth System Research (INAR)/Physics, University of Helsinki, Helsinki, Finland
| | - Bernhard Schmid
- Department of Geography, Remote Sensing Laboratories, University of Zürich, Zürich, Switzerland
| | - Junsheng Huang
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- China National Botanical Garden, Beijing, China
| | - Yuntao Wu
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- China National Botanical Garden, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ziyang Peng
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- China National Botanical Garden, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Lu Yang
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- China National Botanical Garden, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Lingli Liu
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- China National Botanical Garden, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
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23
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Liu C, Jin Y, Lin F, Jiang C, Zeng X, Feng D, Huang F, Tang J. Land use change alters carbon and nitrogen dynamics mediated by fungal functional guilds within soil aggregates. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 902:166080. [PMID: 37544435 DOI: 10.1016/j.scitotenv.2023.166080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/08/2023]
Abstract
Land use change is one of the greatest threats to soil biodiversity and ecological functions; however, how such a transition affects soil carbon (C) and nitrogen (N) dynamics driven by fungal communities at the aggregate level remains unclear. Here, we explored the variation in soil C and N pools, specific enzyme activities and fungal communities and functional guilds within three aggregate sizes (megaaggregates, > 2 mm; macroaggregates, 0.25-2 mm; microaggregates, < 0.25 mm) in a natural forest, 12- and 24-year-old rubber monocultures and corresponding agroforestry systems in tropical China. Tropical forest conversion to rubber monocultures generally reduced C and N pools in all aggregates, while agroforestry systems decreased microbial biomass C and N. Carbon- and N-degrading enzyme activities responded differently to forest conversion and were enhanced in agroforestry systems. The levels of C and N pools and their related enzyme activities increased as the aggregate size decreased. Moreover, fungal compositional shifts in dominance from copiotrophic Ascomycota and Basidiomycota (r-strategists) into oligotrophic Zygomycota (K-strategists) were noted following forest conversion, resulting in more pathogenic fungi at the expense of saprotrophic and arbuscular mycorrhizal fungi. Pathogenic fungi were greatly inhibited due to abundant Mortierella after the establishment of 12-year-old agroforestry systems. The diversity of saprotrophic fungi was the highest in microaggregates. Regardless of land use type, aggregate-associated C and N pools, especially DOC, MBC, NO3--N and DON in microaggregates, were interactively mediated by functional guilds of fungi, which was primarily driven by soil pH. These results highlight the importance of fungal functional guilds in determining C and N dynamics at the aggregate level and provide insights into the sustainable management of cash tree plantations.
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Affiliation(s)
- Chenggang Liu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, China.
| | - Yanqiang Jin
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, China
| | - Fangmei Lin
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chuan Jiang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoling Zeng
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Defeng Feng
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming 650233, China
| | - Fuzhao Huang
- Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China
| | - Jianwei Tang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303, China
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24
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Mahmoudi N, Wilhelm RC. Can we manage microbial systems to enhance carbon storage? Environ Microbiol 2023; 25:3011-3018. [PMID: 37431673 DOI: 10.1111/1462-2920.16462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 06/26/2023] [Indexed: 07/12/2023]
Abstract
Climate change is an urgent environmental issue with wide-ranging impacts on ecosystems and society. Microbes are instrumental in maintaining the balance between carbon (C) accumulation and loss in the biosphere, actively regulating greenhouse gas fluxes from vast reservoirs of organic C stored in soils, sediments and oceans. Heterotrophic microbes exhibit varying capacities to access, degrade and metabolise organic C-leading to variations in remineralisation and turnover rates. The present challenge lies in effectively translating this accumulated knowledge into strategies that effectively steer the fate of organic C towards prolonged sequestration. In this article, we discuss three ecological scenarios that offer potential avenues for shaping C turnover rates in the environment. Specifically, we explore the promotion of slow-cycling microbial byproducts, the facilitation of higher carbon use efficiency, and the influence of biotic interactions. The ability to harness and control these processes relies on the integration of ecological principles and management practices, combined with advances in economically viable technologies to effectively manage microbial systems in the environment.
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Affiliation(s)
- Nagissa Mahmoudi
- Department of Earth and Planetary Sciences, McGill University, Montréal, Quebec, Canada
| | - Roland C Wilhelm
- Department of Agronomy, Lilly Hall of Life Sciences, Purdue University, West Lafayette, Indiana, USA
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25
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Ward EB, Polussa A, Bradford MA. Depth-dependent effects of ericoid mycorrhizal shrubs on soil carbon and nitrogen pools are accentuated under arbuscular mycorrhizal trees. GLOBAL CHANGE BIOLOGY 2023; 29:5924-5940. [PMID: 37480162 DOI: 10.1111/gcb.16887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 07/06/2023] [Indexed: 07/23/2023]
Abstract
Plant mycorrhizal associations influence the accumulation and persistence of soil organic matter and could therefore shape ecosystem biogeochemical responses to global changes that are altering forest composition. For instance, arbuscular mycorrhizal (AM) tree dominance is increasing in temperate forests, and ericoid mycorrhizal (ErM) shrubs can respond positively to canopy disturbances. Yet how shifts in the co-occurrence of trees and shrubs with different mycorrhizal associations will affect soil organic matter pools remains largely unknown. We examine the effects of ErM shrubs on soil carbon and nitrogen stocks and indicators of microbial activity at different depths across gradients of AM versus ectomycorrhizal (EcM) tree dominance in three temperate forest sites. We find that ErM shrubs strongly modulate tree mycorrhizal dominance effects. In surface soils, ErM shrubs increase particulate organic matter accumulation and weaken the positive relationship between soil organic matter stocks and indicators of microbial activity. These effects are strongest under AM trees that lack fungal symbionts that can degrade organic matter. In subsurface soil organic matter pools, by contrast, tree mycorrhizal dominance effects are stronger than those of ErM shrubs. Ectomycorrhizal tree dominance has a negative influence on particulate and mineral-associated soil organic matter pools, and these effects are stronger for nitrogen than for carbon stocks. Our findings suggest that increasing co-occurrence of ErM shrubs and AM trees will enhance particulate organic matter accumulation in surface soils by suppressing microbial activity while having little influence on mineral-associated organic matter in subsurface soils. Our study highlights the importance of considering interactions between co-occurring plant mycorrhizal types, as well as their depth-dependent effects, for projecting changes in soil carbon and nitrogen stocks in response to compositional shifts in temperate forests driven by disturbances and global change.
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Affiliation(s)
- Elisabeth B Ward
- The Forest School, Yale School of the Environment, Yale University, New Haven, Connecticut, USA
- Department of Environmental Science and Forestry, The Connecticut Agricultural Experiment Station, New Haven, Connecticut, USA
- The New York Botanical Garden, The Bronx, New York, USA
| | - Alexander Polussa
- The Forest School, Yale School of the Environment, Yale University, New Haven, Connecticut, USA
| | - Mark A Bradford
- The Forest School, Yale School of the Environment, Yale University, New Haven, Connecticut, USA
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26
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Greenwood L, Nimmo DG, Egidi E, Price JN, McIntosh R, Frew A. Fire shapes fungal guild diversity and composition through direct and indirect pathways. Mol Ecol 2023; 32:4921-4939. [PMID: 37452603 DOI: 10.1111/mec.17068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 06/20/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023]
Abstract
Fire has shaped global ecosystems for millennia by directly killing organisms and indirectly altering habitats and resources. All terrestrial ecosystems, including fire-prone ecosystems, rely on soil-inhabiting fungi, where they play vital roles in ecological processes. Yet our understanding of how fire regimes influence soil fungi remains limited and our knowledge of these interactions in semiarid landscapes is virtually absent. We collected soil samples and vegetation measurements from sites across a gradient in time-since-fire ages (0-75 years-since-fire) and fire frequency (burnt 0-5 times during the recent 29-year period) in a semiarid heathland of south-eastern Australia. We characterized fungal communities using ITS amplicon-sequencing and assigned fungi taxonomically to trophic guilds. We used structural equation models to examine direct, indirect and total effects of time-since-fire and fire frequency on total fungal, ectomycorrhizal, saprotrophic and pathogenic richness. We used multivariate analyses to investigate how total fungal, ectomycorrhizal, saprotrophic and pathogenic species composition differed between post-fire successional stages and fire frequency classes. Time-since-fire was an important driver of saprotrophic richness; directly, saprotrophic richness increased with time-since-fire, and indirectly, saprotrophic richness declined with time-since-fire (resulting in a positive total effect), mediated through the impact of fire on substrates. Frequently burnt sites had lower numbers of saprotrophic and pathogenic species. Post-fire successional stages and fire frequency classes were characterized by distinct fungal communities, with large differences in ectomycorrhizal species composition. Understanding the complex responses of fungal communities to fire can be improved by exploring how the effects of fire flow through ecosystems. Diverse fire histories may be important for maintaining the functional diversity of fungi in semiarid regions.
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Affiliation(s)
- Leanne Greenwood
- Gulbali Institute, Charles Sturt University, Thurgoona, New South Wales, Australia
| | - Dale G Nimmo
- Gulbali Institute, Charles Sturt University, Thurgoona, New South Wales, Australia
| | - Eleonora Egidi
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
| | - Jodi N Price
- Gulbali Institute, Charles Sturt University, Thurgoona, New South Wales, Australia
| | | | - Adam Frew
- Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia
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27
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Guo J, Wei B, Liu J, Eissenstat DM, Yu S, Gong X, Wu J, He X, Yu M. Linkages between Plant Community Composition and Soil Microbial Diversity in Masson Pine Forests. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12091750. [PMID: 37176808 PMCID: PMC10181205 DOI: 10.3390/plants12091750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/18/2023] [Accepted: 04/22/2023] [Indexed: 05/15/2023]
Abstract
Plant species identity influences soil microbial communities directly by host specificity and root exudates, and indirectly by changing soil properties. As a native pioneer species common in early successional communities, Masson pine (Pinus massoniana) forests are widely distributed in subtropical China, and play a key role in improving ecosystem productivity. However, how pine forest composition, especially the dominance of plant functional groups, affects soil microbial diversity remains unclear. Here, we investigated linkages among woody plant composition, soil physicochemical properties, and microbial diversity in forests along a dominance gradient of Masson pine. Soil bacterial and fungal communities were mainly explained by woody plant community composition rather than by woody species alpha diversity, with the dominance of tree (without including shrub) species and ectomycorrhizal woody plant species accounting for more of the variation among microbial communities than pine dominance alone. Structural equation modeling revealed that bacterial diversity was associated with woody plant compositional variation via altered soil physicochemical properties, whereas fungal diversity was directly driven by woody plant composition. Bacterial functional groups involved in carbohydrate and amino acid metabolism were negatively correlated with the availability of soil nitrogen and phosphorus, whereas saprotrophic and pathogenic fungal groups showed negative correlations with the dominance of tree species. These findings indicate strong linkages between woody plant composition than soil microbial diversity; meanwhile, the high proportion of unexplained variability indicates great necessity of further definitive demonstration for better understanding of forest-microbe interactions and associated ecosystem processes.
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Affiliation(s)
- Jing Guo
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Boliang Wei
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jinliang Liu
- College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
| | - David M Eissenstat
- Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, State College, PA 16802, USA
| | - Shuisheng Yu
- Ecological Forestry Development Center of Suichang County, Lishui 323300, China
| | - Xiaofei Gong
- Ecological Forestry Development Center of Suichang County, Lishui 323300, China
| | - Jianguo Wu
- School of Life Sciences and School of Sustainability, Arizona State University, Tempe, AZ 85287, USA
| | - Xiaoyong He
- Lishui Forestry Technology Promotion Station, Lishui 323000, China
| | - Mingjian Yu
- College of Life Sciences, Zhejiang University, Hangzhou 310058, China
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28
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Mayer M, Matthews B, Sandén H, Katzensteiner K, Hagedorn F, Gorfer M, Berger H, Berger TW, Godbold DL, Rewald B. Soil fertility determines whether ectomycorrhizal fungi accelerate or decelerate decomposition in a temperate forest. THE NEW PHYTOLOGIST 2023. [PMID: 37084070 DOI: 10.1111/nph.18930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 04/03/2023] [Indexed: 05/03/2023]
Abstract
Ectomycorrhizal (ECM) fungi can both accelerate and decelerate decomposition of organic matter in forest soils, but a mechanistic understanding of this differential influence is limited. Here, we tested how ECM fungi affect decomposition along a natural fertility gradient in a temperate forest of European beech. Trees were girdled to reduce belowground carbon supply to the soil. Girdling shifted soil fungal community composition and decreased hyphal biomass production and soil CO2 efflux, indicating a reduced ECM fungal activity. Girdling also affected decomposition processes, but the effects depended on fertility. Our results indicate that ECM fungi decelerate decomposition under conditions of low fertility while under conditions of high fertility ECM fungi and their host roots have an accelerating effect. We conclude that both acceleration and deceleration of decomposition of organic matter by ECM fungi can occur within a forest, with soil fertility determining the direction and magnitude of these effects. We suggest a positive feedback between fertility, stand productivity and soil carbon and nitrogen dynamics that is mediated to a large extent by ECM fungi.
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Affiliation(s)
- Mathias Mayer
- Forest Soils and Biogeochemistry, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Zürcherstrasse 111, Birmensdorf, 8903, Switzerland
- Forest Ecology, Institute of Terrestrial Ecosystems (ITES), ETH Zurich, Universitätsstrasse 16, Zürich, 8092, Switzerland
- Department of Forest and Soil Sciences, Institute of Forest Ecology, University of Natural Resources and Life Sciences (BOKU), Peter-Jordan Straße 82, Vienna, 1190, Austria
| | - Bradley Matthews
- Department of Forest and Soil Sciences, Institute of Forest Ecology, University of Natural Resources and Life Sciences (BOKU), Peter-Jordan Straße 82, Vienna, 1190, Austria
- Environment Agency Austria, Spittelauer Lände 5, Vienna, 1090, Austria
| | - Hans Sandén
- Department of Forest and Soil Sciences, Institute of Forest Ecology, University of Natural Resources and Life Sciences (BOKU), Peter-Jordan Straße 82, Vienna, 1190, Austria
| | - Klaus Katzensteiner
- Department of Forest and Soil Sciences, Institute of Forest Ecology, University of Natural Resources and Life Sciences (BOKU), Peter-Jordan Straße 82, Vienna, 1190, Austria
| | - Frank Hagedorn
- Forest Soils and Biogeochemistry, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Zürcherstrasse 111, Birmensdorf, 8903, Switzerland
| | - Markus Gorfer
- Center for Health and Bioresources, Austrian Institute of Technology GmbH (AIT), Konrad-Lorenz-Straße 24, Tulln, 3430, Austria
| | - Harald Berger
- Center for Health and Bioresources, Austrian Institute of Technology GmbH (AIT), Konrad-Lorenz-Straße 24, Tulln, 3430, Austria
- Symbiocyte, Konrad-Lorenz-Straße 24, Tulln, 3430, Austria
| | - Torsten W Berger
- Department of Forest and Soil Sciences, Institute of Forest Ecology, University of Natural Resources and Life Sciences (BOKU), Peter-Jordan Straße 82, Vienna, 1190, Austria
| | - Douglas L Godbold
- Department of Forest and Soil Sciences, Institute of Forest Ecology, University of Natural Resources and Life Sciences (BOKU), Peter-Jordan Straße 82, Vienna, 1190, Austria
- Department of Forest Protection and Wildlife Management, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, Brno, 613 00, Czech Republic
| | - Boris Rewald
- Department of Forest and Soil Sciences, Institute of Forest Ecology, University of Natural Resources and Life Sciences (BOKU), Peter-Jordan Straße 82, Vienna, 1190, Austria
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29
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Shao S, Wu J, He H, Moore TR, Bubier J, Larmola T, Juutinen S, Roulet NT. Ericoid mycorrhizal fungi mediate the response of ombrotrophic peatlands to fertilization: a modeling study. THE NEW PHYTOLOGIST 2023; 238:80-95. [PMID: 36300568 DOI: 10.1111/nph.18555] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
Ericaceous shrubs adapt to the nutrient-poor conditions in ombrotrophic peatlands by forming symbiotic associations with ericoid mycorrhizal (ERM) fungi. Increased nutrient availability may diminish the role of ERM pathways in shrub nutrient uptake, consequently altering the biogeochemical cycling within bogs. To explore the significance of ERM fungi in ombrotrophic peatlands, we developed the model MWMmic (a peat cohort-based biogeochemical model) into MWMmic-NP by explicitly incorporating plant-soil nitrogen (N) and phosphorus (P) cycling and ERM fungi processes. The new model was applied to simulate the biogeochemical cycles in the Mer Bleue (MB) bog in Ontario, Canada, and their responses to fertilization. MWMmic_NP reproduced the carbon(C)-N-P cycles and vegetation dynamics observed in the MB bog, and their responses to fertilization. Our simulations showed that fertilization increased shrub biomass by reducing the C allocation to ERM fungi, subsequently suppressing the growth of underlying Sphagnum mosses, and decreasing the peatland C sequestration. Our species removal simulation further demonstrated that ERM fungi were key to maintaining the shrub-moss coexistence and C sink function of bogs. Our results suggest that ERM fungi play a significant role in the biogeochemical cycles in ombrotrophic peatlands and should be considered in future modeling efforts.
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Affiliation(s)
- Siya Shao
- Department of Geography, McGill University, Montreal, QC, H3A 0G4, Canada
- Department of Biological Sciences, Dartmouth College, Hanover, NH, 03755, USA
| | - Jianghua Wu
- Environment and Sustainability, School of Science and the Environment, Memorial University of Newfoundland, St John's, NL, A1C 5S7, Canada
| | - Hongxing He
- Department of Geography, McGill University, Montreal, QC, H3A 0G4, Canada
| | - Tim R Moore
- Department of Geography, McGill University, Montreal, QC, H3A 0G4, Canada
| | - Jill Bubier
- Department of Environmental Studies, Mount Holyoke College, South Hadley, MA, 01075, USA
| | - Tuula Larmola
- Natural Resources Institute Finland (Luke), 00790, Helsinki, Finland
| | - Sari Juutinen
- Finnish Meteorological Institute, 00560, Helsinki, Finland
| | - Nigel T Roulet
- Department of Geography, McGill University, Montreal, QC, H3A 0G4, Canada
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30
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Maillard F, Kohler A, Morin E, Hossann C, Miyauchi S, Ziegler-Devin I, Gérant D, Angeli N, Lipzen A, Keymanesh K, Johnson J, Barry K, Grigoriev IV, Martin FM, Buée M. Functional genomics gives new insights into the ectomycorrhizal degradation of chitin. THE NEW PHYTOLOGIST 2023; 238:845-858. [PMID: 36702619 DOI: 10.1111/nph.18773] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Ectomycorrhizal (EcM) fungi play a crucial role in the mineral nitrogen (N) nutrition of their host trees. While it has been proposed that several EcM species also mobilize organic N, studies reporting the EcM ability to degrade N-containing polymers, such as chitin, remain scarce. Here, we assessed the capacity of a representative collection of 16 EcM species to acquire 15 N from 15 N-chitin. In addition, we combined genomics and transcriptomics to identify pathways involved in exogenous chitin degradation between these fungal strains. Boletus edulis, Imleria badia, Suillus luteus, and Hebeloma cylindrosporum efficiently mobilized N from exogenous chitin. EcM genomes primarily contained genes encoding for the direct hydrolysis of chitin. Further, we found a significant relationship between the capacity of EcM fungi to assimilate organic N from chitin and their genomic and transcriptomic potentials for chitin degradation. These findings demonstrate that certain EcM fungal species depolymerize chitin using hydrolytic mechanisms and that endochitinases, but not exochitinases, represent the enzymatic bottleneck of chitin degradation. Finally, this study shows that the degradation of exogenous chitin by EcM fungi might be a key functional trait of nutrient cycling in forests dominated by EcM fungi.
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Affiliation(s)
- François Maillard
- Université de Lorraine, INRAE, UMR 1136 Interactions Arbres-Microorganismes, 54280, Champenoux, France
| | - Annegret Kohler
- Université de Lorraine, INRAE, UMR 1136 Interactions Arbres-Microorganismes, 54280, Champenoux, France
| | - Emmanuelle Morin
- Université de Lorraine, INRAE, UMR 1136 Interactions Arbres-Microorganismes, 54280, Champenoux, France
| | - Christian Hossann
- Université de Lorraine, AgroParisTech, INRAE, SILVA, Silvatech, F-54000, Nancy, France
| | - Shingo Miyauchi
- Université de Lorraine, INRAE, UMR 1136 Interactions Arbres-Microorganismes, 54280, Champenoux, France
| | | | - Dominique Gérant
- Université de Lorraine, AgroParisTech, INRAE, UMR Silva, 54000, Nancy, France
| | - Nicolas Angeli
- Université de Lorraine, AgroParisTech, INRAE, SILVA, Silvatech, F-54000, Nancy, France
| | - Anna Lipzen
- Lawrence Berkeley National Laboratory, US Department of Energy Joint Genome Institute, Berkeley, CA, 94720, USA
| | - Keykhosrow Keymanesh
- Lawrence Berkeley National Laboratory, US Department of Energy Joint Genome Institute, Berkeley, CA, 94720, USA
| | - Jenifer Johnson
- Lawrence Berkeley National Laboratory, US Department of Energy Joint Genome Institute, Berkeley, CA, 94720, USA
| | - Kerrie Barry
- Lawrence Berkeley National Laboratory, US Department of Energy Joint Genome Institute, Berkeley, CA, 94720, USA
| | - Igor V Grigoriev
- Lawrence Berkeley National Laboratory, US Department of Energy Joint Genome Institute, Berkeley, CA, 94720, USA
- Department of Plant and Microbial Biology, University of California Berkeley, Berkeley, CA, 94720, USA
| | - Francis M Martin
- Université de Lorraine, INRAE, UMR 1136 Interactions Arbres-Microorganismes, 54280, Champenoux, France
| | - Marc Buée
- Université de Lorraine, INRAE, UMR 1136 Interactions Arbres-Microorganismes, 54280, Champenoux, France
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31
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Wu D, Bai H, Zhao C, Peng M, Chi Q, Dai Y, Gao F, Zhang Q, Huang M, Niu B. The characteristics of soil microbial co-occurrence networks across a high-latitude forested wetland ecotone in China. Front Microbiol 2023; 14:1160683. [PMID: 37025633 PMCID: PMC10072330 DOI: 10.3389/fmicb.2023.1160683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 03/02/2023] [Indexed: 04/08/2023] Open
Abstract
To understand the effect of seasonal variations on soil microbial communities in a forested wetland ecotone, here, we investigated the dynamics of the diversities and functions of both soil bacterial and fungal communities inhabiting three wetland types (forested wetland, shrub wetland and herbaceous vegetation wetland) from forest-wetland ecotone of northern Xiaoxing'an Mountains spanning different seasons. β-diversity of soil microbial communities varied significantly among different vegetation types (Betula platyphylla-Larix gmelinii, Alnus sibirica, Betula ovalifolia, and Carex schmidtii wetlands). We totally detected 34 fungal and 14 bacterial indicator taxa among distinctive groups by using Linear discriminant analysis effect size (LEfSe) analysis, and identified nine network hubs as the most important nodes detected in whole fungi, bacteria, and fungi-bacteria networks. At the vegetation type-level, bacterial and fungal microbiome living in C. schmidtii wetland soil possessed fewer positive interactions and lower modularity than those in other types of wetland soil. Furthermore, we also discovered that ectomycorrhizal fungi were dominant in the fungal microbiota existing in forested and shrub wetland soils, whereas arbuscular mycorrhizal fungi were predominated in those residing in herbaceous vegetation wetland soil. The distribution of the predicted bacterial functional enzymes also obviously varied among different vegetation-types. In addition, the correlation analysis further revealed that the key fungal network modules were significantly affected by the contents of total N and soil water-soluble K, whereas most of the bacterial network modules were remarkably positively driven by the contents of total N, soil water-soluble K, Mg and Na. Our study suggested that vegetation type are substantive factors controlling the diversity, composition and functional group of soil microbiomes from forest-wetland ecotone of northern Xiaoxing'an Mountains.
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Affiliation(s)
- Di Wu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- The Center for Basic Forestry Research, College of Forestry, Northeast Forestry University, Harbin, China
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Hui Bai
- Key Laboratory of Fast-Growing Tree Cultivating of Heilongjiang Province, Forestry Science Research Institute of Heilongjiang Province, Harbin, China
| | - Caihong Zhao
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Mu Peng
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Qi Chi
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Yaping Dai
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Fei Gao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- College of Life Science, Northeast Forestry University, Harbin, China
| | - Qiang Zhang
- Institute of Economic Forest of Xinjiang Academy of Forestry Sciences, Urumqi, China
| | - Minmin Huang
- Institute of Economic Forest of Xinjiang Academy of Forestry Sciences, Urumqi, China
| | - Ben Niu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- The Center for Basic Forestry Research, College of Forestry, Northeast Forestry University, Harbin, China
- College of Life Science, Northeast Forestry University, Harbin, China
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32
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Tanunchai B, Ji L, Schroeter SA, Wahdan SFM, Hossen S, Delelegn Y, Buscot F, Lehnert AS, Alves EG, Hilke I, Gleixner G, Schulze ED, Noll M, Purahong W. FungalTraits vs. FUNGuild: Comparison of Ecological Functional Assignments of Leaf- and Needle-Associated Fungi Across 12 Temperate Tree Species. MICROBIAL ECOLOGY 2023; 85:411-428. [PMID: 35124727 PMCID: PMC9958157 DOI: 10.1007/s00248-022-01973-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 01/21/2022] [Indexed: 05/16/2023]
Abstract
Recently, a new annotation tool "FungalTraits" was created based on the previous FUNGuild and FunFun databases, which has attracted high attention in the scientific community. These databases were widely used to gain more information from fungal sequencing datasets by assigning fungal functional traits. More than 1500 publications so far employed FUNGuild and the aim of this study is to compare this successful database with the recent FungalTraits database. Quality and quantity of the assignment by FUNGuild and FungalTraits to a fungal internal transcribed spacer (ITS)-based amplicon sequencing dataset on amplicon sequence variants (ASVs) were addressed. Sequencing dataset was derived from leaves and needles of 12 temperate broadleaved and coniferous tree species. We found that FungalTraits assigned more functional traits than FUNGuild, and especially the coverage of saprotrophs, plant pathogens, and endophytes was higher while lichenized fungi revealed similar findings. Moreover, ASVs derived from leaves and needles of each tree species were better assigned to all available fungal traits as well as to saprotrophs by FungalTraits compared to FUNGuild in particular for broadleaved tree species. Assigned ASV richness as well as fungal functional community composition was higher and more diverse after analyses with FungalTraits compared to FUNGuild. Moreover, datasets of both databases showed similar effect of environmental factors for saprotrophs but for endophytes, unidentical patterns of significant corresponding factors were obtained. As a conclusion, FungalTraits is superior to FUNGuild in assigning a higher quantity and quality of ASVs as well as a higher frequency of significant correlations with environmental factors.
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Affiliation(s)
- Benjawan Tanunchai
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120 Halle (Saale), Germany
- Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
| | - Li Ji
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120 Halle (Saale), Germany
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, 150040 Harbin, People’s Republic of China
| | - Simon Andreas Schroeter
- Max Planck Institute for Biogeochemistry, Biogeochemical Processes Department, Hans-Knöll-Str. 10, 07745 Jena, Germany
| | - Sara Fareed Mohamed Wahdan
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120 Halle (Saale), Germany
- Botany Department, Faculty of Science, Suez Canal University, Ismailia, 41522 Egypt
| | - Shakhawat Hossen
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120 Halle (Saale), Germany
- Institute of Bioanalysis, Coburg University of Applied Sciences and Arts, Coburg, Germany
| | - Yoseph Delelegn
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120 Halle (Saale), Germany
| | - François Buscot
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120 Halle (Saale), Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany
| | - Ann-Sophie Lehnert
- Max Planck Institute for Biogeochemistry, Biogeochemical Processes Department, Hans-Knöll-Str. 10, 07745 Jena, Germany
| | - Eliane Gomes Alves
- Max Planck Institute for Biogeochemistry, Biogeochemical Processes Department, Hans-Knöll-Str. 10, 07745 Jena, Germany
| | - Ines Hilke
- Max Planck Institute for Biogeochemistry, Biogeochemical Processes Department, Hans-Knöll-Str. 10, 07745 Jena, Germany
| | - Gerd Gleixner
- Max Planck Institute for Biogeochemistry, Biogeochemical Processes Department, Hans-Knöll-Str. 10, 07745 Jena, Germany
| | - Ernst-Detlef Schulze
- Max Planck Institute for Biogeochemistry, Biogeochemical Processes Department, Hans-Knöll-Str. 10, 07745 Jena, Germany
| | - Matthias Noll
- Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Bayreuth, Germany
- Institute of Bioanalysis, Coburg University of Applied Sciences and Arts, Coburg, Germany
| | - Witoon Purahong
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120 Halle (Saale), Germany
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33
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Horning AL, Koury SS, Meachum M, Kuehn KA, Hoeksema JD. Dirt cheap: an experimental test of controls on resource exchange in an ectomycorrhizal symbiosis. THE NEW PHYTOLOGIST 2023; 237:987-998. [PMID: 36346200 DOI: 10.1111/nph.18603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
To distinguish among hypotheses on the importance of resource-exchange ratios in outcomes of mutualisms, we measured resource (carbon (C), nitrogen (N), and phosphorus (P)) transfers and their ratios, between Pinus taeda seedlings and two ectomycorrhizal (EM) fungal species, Rhizopogon roseolus and Pisolithus arhizus in a laboratory experiment. We evaluated how ambient light affected those resource fluxes and ratios over three time periods (10, 20, and 30 wk) and the consequences for plant and fungal biomass accrual, in environmental chambers. Our results suggest that light availability is an important factor driving absolute fluxes of N, P, and C, but not exchange ratios, although its effects vary among EM fungal species. Declines in N : C and P : C exchange ratios over time, as soil nutrient availability likely declined, were consistent with predictions of biological market models. Absolute transfer of P was an important predictor of both plant and fungal biomass, consistent with the excess resource-exchange hypothesis, and N transfer to plants was positively associated with fungal biomass. Altogether, light effects on resource fluxes indicated mixed support for various theoretical frameworks, while results on biomass accrual better supported the excess resource-exchange hypothesis, although among-species variability is in need of further characterization.
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Affiliation(s)
- Amber L Horning
- Department of Biology, University of Mississippi, PO Box 1848, University, MS, 38677, USA
| | - Stephanie S Koury
- School of Biological, Environmental and Earth Sciences, The University of Southern Mississippi, 118 College Drive #5018, Hattiesburg, MS, 39406-0001, USA
| | - Mariah Meachum
- Department of Biology, University of Mississippi, PO Box 1848, University, MS, 38677, USA
| | - Kevin A Kuehn
- School of Biological, Environmental and Earth Sciences, The University of Southern Mississippi, 118 College Drive #5018, Hattiesburg, MS, 39406-0001, USA
| | - Jason D Hoeksema
- Department of Biology, University of Mississippi, PO Box 1848, University, MS, 38677, USA
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34
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Lv C, Wang C, Cai A, Zhou Z. Global magnitude of rhizosphere effects on soil microbial communities and carbon cycling in natural terrestrial ecosystems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:158961. [PMID: 36155049 DOI: 10.1016/j.scitotenv.2022.158961] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 08/31/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
The rhizosphere is one of the most dynamic interfaces on the Earth. Understanding the magnitudes of rhizosphere effects (RE, difference in bio-physicochemical properties between rhizosphere and bulk soils) on soil microbial communities and their moderators is important for studying on below-ground carbon (C) cycling. A comprehensive meta-analysis was conducted to quantify the REs on soil microbial biomass, community structure, respiration, and C-degrading enzymes. We found that REs on soil C and nutrients, total microbial biomass, the abundance of specific microbial groups, fungi to bacteria ratio, respiration, and C-degrading enzymes were positive, but the magnitudes were varied with biomes, plant functional types, and mycorrhizal types. REs on microbial biomass, respiration, and C-degrading enzymes increased with the increase of mean annual temperature and mean annual precipitation, but decreased with the increase of soil clay, C, nitrogen (N), and phosphorus (P) contents. The REs on microbial biomass and respiration also increased as the REs on soil C:N:P increased. Compared with bulk soil, per unit rhizosphere soil C supported more microbial biomass, per unit of which respired more C, leading to faster C decomposition in rhizosphere. Our findings indicate that the increase in microbial biomass, co-metabolism induced by labile and energy-rich organic C of root exudates, and overflow respiration induced by stoichiometric imbalance together contribute to the enhanced C decomposition in rhizosphere. The global pattern of REs on soil microbial communities is critical to revealing the plant-microbe-soil interactions in terrestrial ecosystems.
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Affiliation(s)
- Chunhua Lv
- Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
| | - Chuankuan Wang
- Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China
| | - Andong Cai
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 10081, China
| | - Zhenghu Zhou
- Center for Ecological Research, Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China.
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35
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Plant Traits and Phylogeny Predict Soil Carbon and Nutrient Cycling in Mediterranean Mixed Forests. Ecosystems 2023. [DOI: 10.1007/s10021-022-00815-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
AbstractSoil functioning is closely linked to the interactions between biological communities with the physical environment. Yet, the impact of plant community attributes on metabolic processes promoting soil nutrient cycling remains largely unknown. We hypothesized that the plant community acts as a regulating agent of nutrient mobilization in soils according to the phylogenetic and morpho-functional traits of plant species of which it is composed. Rhizosphere soils were collected in autumn and spring under 32 tree and shrub species in two Mediterranean mixed forests (four plots in each) located in southern Spain, and nine soil enzymatic activities related to C, N and P mobilization were assessed. Phylogeny and morpho-functional traits of plant species were recorded and their imprint in soil enzymatic activities across forests was determined. The results showed a plant phylogenetic signal for N mobilization in both forests, while it varied across forests for non-labile C and P mobilization. The plant phylogenetic signals were primarily driven by lineages that diversified through the Miocene, about 25 Myr ago. In addition, leaf traits and plant’s mycorrhizal type explained soil enzymatic activities independently from phylogeny. C and P mobilization increased under ectomycorrhizal plants, whilst enhanced N mobilization did occur under arbuscular mycorrhizal ones. The plant community composition led to a different carbon and nutrient mobilization degree, which in turn was mediated by distinct microbial communities mirroring differentiated resource-acquisition strategies of plants. Our results highlight the role of plant traits and mycorrhizal interactions in modulating carbon and nutrient cycling in Mediterranean mixed forest soils.
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36
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Friggens NL, Hartley IP, Parker TC, Subke J, Wookey PA. Trees out‐forage understorey shrubs for nitrogen patches in a subarctic mountain birch forest. OIKOS 2022. [DOI: 10.1111/oik.09567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Nina L. Friggens
- Geography, Faculty of Environment, Science and Economy, Univ. of Exeter Exeter UK
- Biological & Environmental Sciences, Faculty of Natural Sciences, Univ. of Stirling Stirling UK
| | - Iain P. Hartley
- Geography, Faculty of Environment, Science and Economy, Univ. of Exeter Exeter UK
| | - Thomas C. Parker
- Ecological Sciences, The James Hutton Inst. Craigiebuckler Aberdeen UK
| | - Jens‐Arne Subke
- Biological & Environmental Sciences, Faculty of Natural Sciences, Univ. of Stirling Stirling UK
| | - Philip A. Wookey
- Biological & Environmental Sciences, Faculty of Natural Sciences, Univ. of Stirling Stirling UK
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37
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Guo Y, Ji L, Wang M, Shan C, Shen F, Yang Y, He G, Purahong W, Yang L. View from the Top: Insights into the Diversity and Community Assembly of Ectomycorrhizal and Saprotrophic Fungi along an Altitudinal Gradient in Chinese Boreal Larix gmelinii-Dominated Forests. Microorganisms 2022; 10:1997. [PMID: 36296273 PMCID: PMC9607379 DOI: 10.3390/microorganisms10101997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 09/30/2022] [Accepted: 10/07/2022] [Indexed: 11/24/2022] Open
Abstract
The altitudinal patterns of soil fungi have attracted considerable attention; however, few studies have investigated the diversity and community assembly of fungal functional guilds along an altitudinal gradient. Here, we explored ectomycorrhizal (EcM) and saprotrophic (SAP) fungal diversity and community assembly along a 470 m vertical gradient (ranging from 830 to 1300 m) on Oakley Mountain, sampling bulk soils in the 0-10 cm and 10-20 cm soil layers of Larix gmelinii-dominated forests. Illumina MiSeq sequencing of the ITS genes was employed to explore the fungal community composition and diversity. The relative abundance of EcM and SAP fungi showed a divergent pattern along an altitudinal gradient, while we observed a consistent altitudinal tendency for EcM and SAP fungal diversity and community assembly. The diversity of both fungal guilds increased with increasing altitude. Altitude and soil moisture were the key factors affecting the community composition of both fungal guilds. In addition, the plant community composition significantly affected the EcM fungal community composition, whereas the dissolved organic nitrogen and ammonium nitrogen contents were the driving factors of SAP fungal community. Despite the effects of vegetation and soil factors, EcM and SAP fungal communities were mainly governed by stochastic processes (especially drift) at different altitudes and soil depths. These results shed new light on the ecology of different fungal functional guilds along an altitudinal gradient, which will provide a deeper understanding of the biogeography of soil fungi.
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Affiliation(s)
- Yi Guo
- School of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
| | - Li Ji
- School of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, 06120 Halle (Saale), Germany
| | - Mingwei Wang
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Chengfeng Shan
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Fangyuan Shen
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Yuchun Yang
- Jilin Academy of Forestry, Changchun 130033, China
| | - Gongxiu He
- School of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
| | - Witoon Purahong
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, 06120 Halle (Saale), Germany
| | - Lixue Yang
- Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
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Fanin N, Clemmensen KE, Lindahl BD, Farrell M, Nilsson MC, Gundale MJ, Kardol P, Wardle DA. Ericoid shrubs shape fungal communities and suppress organic matter decomposition in boreal forests. THE NEW PHYTOLOGIST 2022; 236:684-697. [PMID: 35779014 DOI: 10.1111/nph.18353] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
Mycorrhizal fungi associated with boreal trees and ericaceous shrubs are central actors in organic matter (OM) accumulation through their belowground carbon allocation, their potential capacity to mine organic matter for nitrogen (N) and their ability to suppress saprotrophs. Yet, interactions between co-occurring ectomycorrhizal fungi (EMF), ericoid mycorrhizal fungi (ERI), and saprotrophs are poorly understood. We used a long-term (19 yr) plant functional group manipulation experiment with removals of tree roots, ericaceous shrubs and mosses and analysed the responses of different fungal guilds (assessed by metabarcoding) and their interactions in relation to OM quality (assessed by mid-infrared spectroscopy and nuclear magnetic resonance) and decomposition (litter mesh-bags) across a 5000-yr post-fire boreal forest chronosequence. We found that the removal of ericaceous shrubs and associated ERI changed the composition of EMF communities, with larger effects occurring at earlier stages of the chronosequence. Removal of shrubs was associated with enhanced N availability, litter decomposition and enrichment of the recalcitrant OM fraction. We conclude that increasing abundance of slow-growing ericaceous shrubs and the associated fungi contributes to increasing nutrient limitation, impaired decomposition and progressive OM accumulation in boreal forests, particularly towards later successional stages. These results are indicative of the contrasting roles of EMF and ERI in regulating belowground OM storage.
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Affiliation(s)
- Nicolas Fanin
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901-83, Umeå, Sweden
- INRAE, Bordeaux Sciences Agro, UMR 1391 ISPA, 71 avenue Edouard Bourlaux, CS 20032, F33882, Villenave-d'Ornon cedex, France
| | - Karina E Clemmensen
- Department of Forest Mycology and Plant Pathology, Uppsala BioCenter, Swedish University of Agricultural Sciences, Box 7026, SE-75007, Uppsala, Sweden
| | - Björn D Lindahl
- Department of Soil and Environment, Swedish University of Agricultural Sciences, Box 7014, SE-75007, Uppsala, Sweden
| | - Mark Farrell
- CSIRO Agriculture & Food, Kaurna Country, Locked Bag 2, Glen Osmond, South Australia, 5064, Australia
| | - Marie-Charlotte Nilsson
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901-83, Umeå, Sweden
| | - Michael J Gundale
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901-83, Umeå, Sweden
| | - Paul Kardol
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901-83, Umeå, Sweden
| | - David A Wardle
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901-83, Umeå, Sweden
- Asian School of the Environment, Nanyang Technological University, 50 Nanyang Avenue, Singapore City, 639798, Singapore
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Watershed-scale Variation in Potential Fungal Community Contributions to Ectomycorrhizal Biogeochemical Syndromes. Ecosystems 2022. [DOI: 10.1007/s10021-022-00788-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ward EB, Duguid MC, Kuebbing SE, Lendemer JC, Bradford MA. The functional role of ericoid mycorrhizal plants and fungi on carbon and nitrogen dynamics in forests. THE NEW PHYTOLOGIST 2022; 235:1701-1718. [PMID: 35704030 DOI: 10.1111/nph.18307] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Ericoid mycorrhizal (ErM) shrubs commonly occur in forest understories and could therefore alter arbuscular (AM) and/or ectomycorrhizal (EcM) tree effects on soil carbon and nitrogen dynamics. Specifically, ErM fungi have extensive organic matter decay capabilities, and ErM plant and fungal tissues have high concentrations of secondary compounds that can form persistent complexes in the soil. Together, these traits could contribute to organic matter accumulation and inorganic nutrient limitation. These effects could also differ in AM- vs EcM-dominated stands at multiple scales within and among forest biomes by, for instance, altering fungal guild interactions. Most work on ErM effects in forests has been conducted in boreal forests dominated by EcM trees. However, ErM plants occur in c. 96, 69 and 29% of boreal, temperate and tropical forests, respectively. Within tropical montane forests, the effects of ErM plants could be particularly pronounced because their traits are more distinct from AM than EcM trees. Because ErM fungi can function as free-living saprotrophs, they could also be more resilient to forest disturbances than obligate symbionts. Further consideration of ErM effects within and among forest biomes could improve our understanding of how cooccurring mycorrhizal types interact to collectively affect soil carbon and nitrogen dynamics under changing conditions.
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Affiliation(s)
- Elisabeth B Ward
- The Forest School, Yale School of the Environment, Yale University, New Haven, CT, 06511, USA
- The New York Botanical Garden, The Bronx, NY, 10458, USA
| | - Marlyse C Duguid
- The Forest School, Yale School of the Environment, Yale University, New Haven, CT, 06511, USA
| | - Sara E Kuebbing
- The Forest School, Yale School of the Environment, Yale University, New Haven, CT, 06511, USA
| | | | - Mark A Bradford
- The Forest School, Yale School of the Environment, Yale University, New Haven, CT, 06511, USA
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Yang H, Yang Z, Wang QC, Wang YL, Hu HW, He JZ, Zheng Y, Yang Y. Compartment and Plant Identity Shape Tree Mycobiome in a Subtropical Forest. Microbiol Spectr 2022; 10:e0134722. [PMID: 35863008 PMCID: PMC9430249 DOI: 10.1128/spectrum.01347-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 06/26/2022] [Indexed: 11/20/2022] Open
Abstract
Deciphering the relationships between microbes and their host plants is critical for a better understanding of microbial diversity maintenance and community stability. Here, we investigated fungal diversity and community assembly in the phyllosphere and rhizosphere of 13 tree species in a subtropical common-garden experiment. The results showed that fungal community structures significantly differed across compartments (leaf, root, and soil) and different tree species. Higher α-diversity was observed in the phyllosphere than in the roots and rhizospheric soil. Fungal community composition (β-diversity) was significantly affected by both compartment and species identity. The fungal community compositions were significantly correlated with soil pH in the roots and the soils as well as with soil nitrate and leaf total phosphorus in the leaves. We found that fungal community assemblies were mainly driven by deterministic processes, regardless of compartments. Moreover, host preference analyses indicated that stronger plant/fungus preferences occurred in leaves than in roots and soils. Our results highlight the differences in tree mycobiome between aboveground and belowground compartments and have important implications for the promotion of biodiversity conservation and management sustainability for the subtropical forest. IMPORTANCE Subtropical mountain forests are widely distributed in Southern China and are characterized by high biodiversity. The interactions between plants and fungi play pivotal roles in biodiversity maintenance and community stability. Nevertheless, knowledge of fungal diversity and of the community assembly patterns of woody plants is scarce. Here, we investigated fungal diversity and community assembly in the phyllosphere and rhizosphere of 13 tree species in a common-garden experiment. We found that both compartment and plant identity influenced fungal diversity, community, and guild compositions, while deterministic processes mainly governed the fungal community assembly, especially in the rhizospheric fungal communities. Our results demonstrate that tree leaves represent stronger host/fungi preferences than do roots and soils. Together, our findings enhance the understanding of the roles of compartment and plant identity in structuring fungal communities as well as promote fungal diversity maintenance in subtropical mountain forest ecosystems.
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Affiliation(s)
- Hao Yang
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
| | - Zhijie Yang
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
- Sanming Forest Ecosystem National Observation and Research Station, Sanming, Fujian, China
| | - Quan-Cheng Wang
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
| | - Yong-Long Wang
- Faculty of Biological Science and Technology, Baotou Teacher’s College, Baotou, Inner Mongolia, China
| | - Hang-Wei Hu
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
| | - Ji-Zheng He
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
- Sanming Forest Ecosystem National Observation and Research Station, Sanming, Fujian, China
| | - Yong Zheng
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
| | - Yusheng Yang
- Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
- Sanming Forest Ecosystem National Observation and Research Station, Sanming, Fujian, China
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Liang S, Wang W, Zeng X, Wu R, Chen W. Enhanced suppression of saprotrophs by ectomycorrhizal fungi under high level of nitrogen fertilization. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.974449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Ectomycorrhizal fungi (EMF) are widespread in northern conifer forests. By competing with the free-living saprotrophic fungal and bacterial communities for limited soil nitrogen, EMF are expected to suppress litter decomposition and thus drive soil carbon accumulation. The EMF may also stimulate rhizosphere microbial growth through inputs of labile plant carbon, and subsequently contribute to the soil carbon pool via microbial necromass. Here we examined the relative strength of these two potential EMF effects in a northern conifer plantation of the Saihanba Forest, the largest plantation in China. The soil fungal and bacterial biomass, as well as their respiration, were quantified within the two types of soil cores that either allow or exclude the ingrowth of EMF. We also set up a nitrogen fertilization gradient (0, 5, 10, 15 g N m–2 y–1) in this plantation to quantify the influence of external inorganic nitrogen on the EMF effects. We found evidence that EMF inhibit the overall fungal and bacteria biomass, confirming the suppression of saprotrophs by EMF. In addition, high levels of external nitrogen fertilization (15 g N m–2 y–1) might further enhance the suppression by EMF. In contrast, the presence of EMF consistently increased soil microbial respiration across all nitrogen fertilization levels, indicating that the carbon allocated to EMF could have been largely consumed by microbial respiration and contributed minimally to the accumulation of microbial biomass. Our results also indicated that the suppression of saprotrophs by EMF may play a critical role in driving continuous soil carbon accumulation in this northern pine plantation under atmospheric nitrogen deposition.
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Xia Y, Wang J, Guo C, Xu H, Wang W, Yang M, Shen Q, Zhang R, Miao Y. Exploring the multi-level regulation of lignocellulases in the filamentous fungus Trichoderma guizhouense NJAU4742 from an omics perspective. Microb Cell Fact 2022; 21:144. [PMID: 35842666 PMCID: PMC9288086 DOI: 10.1186/s12934-022-01869-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 07/07/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Filamentous fungi are highly efficient at deconstructing plant biomass by secreting a variety of enzymes, but the complex enzymatic regulation underlying this process is not conserved and remains unclear. RESULTS In this study, cellulases and xylanases could specifically respond to Avicel- and xylan-induction, respectively, in lignocellulose-degrading strain Trichoderma guizhouense NJAU4742, however, the differentially regulated cellulases and xylanases were both under the absolute control of the same TgXyr1-mediated pathway. Further analysis showed that Avicel could specifically induce cellulase expression, which supported the existence of an unknown specific regulator of cellulases in strain NJAU4742. The xylanase secretion is very complex, GH10 endoxylanases could only be induced by Avicel, while, other major xylanases were significantly induced by both Avicel and xylan. For GH10 xylanases, an unknown specific regulator was also deduced to exist. Meanwhile, the post-transcriptional inhibition was subsequently suggested to stop the Avicel-induced xylanases secretion, which explained the specifically high xylanase activities when induced by xylan in strain NJAU4742. Additionally, an economical strategy used by strain NJAU4742 was proposed to sense the environmental lignocellulose under the carbon starvation condition, that only slightly activating 4 lignocellulose-degrading genes before largely secreting all 33 TgXyr1-controlled lignocellulases if confirming the existence of lignocellulose components. CONCLUSIONS This study, aiming to explore the unknown mechanisms of plant biomass-degrading enzymes regulation through the combined omics analysis, will open directions for in-depth understanding the complex carbon utilization in filamentous fungi.
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Affiliation(s)
- Yanwei Xia
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 210095, Nanjing, People's Republic of China
| | - Jingfan Wang
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 210095, Nanjing, People's Republic of China
| | - Chuanxu Guo
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 210095, Nanjing, People's Republic of China
| | - Huanhuan Xu
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 210095, Nanjing, People's Republic of China
| | - Wei Wang
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 210095, Nanjing, People's Republic of China
| | - Mingzhu Yang
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 210095, Nanjing, People's Republic of China
| | - Qirong Shen
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 210095, Nanjing, People's Republic of China
| | - Ruifu Zhang
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 210095, Nanjing, People's Republic of China
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, 100081, Beijing, China
| | - Youzhi Miao
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, 210095, Nanjing, People's Republic of China.
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Which Is the Best Substrate to Regenerate? A Comparative Pot Experiment for Tree Seedling Growth on Decayed Wood and in Soil. FORESTS 2022. [DOI: 10.3390/f13071036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Dead wood is an important microsite for seedling regeneration in forest ecosystems. Although recent studies have found important associations between fungal wood decay type (white rot and brown rot) and both density and species composition of regenerating seedlings, its abiotic and biotic mechanisms are unknown. In the present study, pot experiments were conducted with the seedlings of two ectomycorrhizal tree species (Abies veitchii and Betula ermanii) and two arbuscular mycorrhizal tree species (Chamaecyparis obtusa and Cryptomeria japonica) to evaluate their growth using three substrates: brown rot wood, white rot wood, and soil. Results showed that the shoot growth of B. ermanii grown in white rot wood was greater than in other substrates, but this effect disappeared in sterilized substrates, suggesting some biotic positive effects occur in white rot wood. The seedling weights of Cr. japonica and Ch. obtusa were found to be greater in soil than in wood, and this may be partly attributable to the high mycorrhizal rate of their roots in soil. Colonization of arbuscular and ectomycorrhizal fungi was restricted to the seedlings in unsterilized soil. These results demonstrate the importance of the biological mechanisms affecting seedlings’ preferences for a variety of regeneration microsites and illustrate the need for future experiments to include larger sets of seedling species.
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Fernández N, Knoblochová T, Kohout P, Janoušková M, Cajthaml T, Frouz J, Rydlová J. Asymmetric Interaction Between Two Mycorrhizal Fungal Guilds and Consequences for the Establishment of Their Host Plants. FRONTIERS IN PLANT SCIENCE 2022; 13:873204. [PMID: 35755655 PMCID: PMC9218742 DOI: 10.3389/fpls.2022.873204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
Arbuscular mycorrhiza (AM) and ectomycorrhiza (EcM) are the most abundant and widespread types of mycorrhizal symbiosis, but there is little and sometimes conflicting information regarding the interaction between AM fungi (AMF) and EcM fungi (EcMF) in soils. Their competition for resources can be particularly relevant in successional ecosystems, which usually present a transition from AM-forming herbaceous vegetation to EcM-forming woody species. The aims of this study were to describe the interaction between mycorrhizal fungal communities associated with AM and EcM hosts naturally coexisting during primary succession on spoil banks and to evaluate how this interaction affects growth and mycorrhizal colonization of seedlings of both species. We conducted a greenhouse microcosm experiment with Betula pendula and Hieracium caespitosum as EcM and AM hosts, respectively. They were cultivated in three-compartment rhizoboxes. Two lateral compartments contained different combinations of both host plants as sources of fungal mycelia colonizing the middle compartment, where fungal biomass, diversity, and community composition as well as the growth of each host plant species' seedlings were analyzed. The study's main finding was an asymmetric outcome of the interaction between the two plant species: while H. caespitosum and associated AMF reduced the abundance of EcMF in soil, modified the composition of EcMF communities, and also tended to decrease growth and mycorrhizal colonization of B. pendula seedlings, the EcM host did not have such effects on AM plants and associated AMF. In the context of primary succession, these findings suggest that ruderal AM hosts could hinder the development of EcM tree seedlings, thus slowing the transition from AM-dominated to EcM-dominated vegetation in early successional stages.
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Affiliation(s)
- Natalia Fernández
- Laboratorio de Microbiología Aplicada y Biotecnología, Centro Regional Universitario Bariloche, Universidad Nacional del Comahue - IPATEC, Bariloche, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Tereza Knoblochová
- Department of Mycorrhizal Symbioses, Institute of Botany, Czech Academy of Sciences, Průhonice, Czechia
| | - Petr Kohout
- Department of Mycorrhizal Symbioses, Institute of Botany, Czech Academy of Sciences, Průhonice, Czechia
- Institute of Microbiology, Czech Academy of Sciences, Prague, Czechia
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Prague, Czechia
| | - Martina Janoušková
- Department of Mycorrhizal Symbioses, Institute of Botany, Czech Academy of Sciences, Průhonice, Czechia
| | - Tomáš Cajthaml
- Faculty of Science, Institute for Environmental Studies, Charles University, Prague, Czechia
| | - Jan Frouz
- Faculty of Science, Institute for Environmental Studies, Charles University, Prague, Czechia
| | - Jana Rydlová
- Department of Mycorrhizal Symbioses, Institute of Botany, Czech Academy of Sciences, Průhonice, Czechia
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Cao C, Huang J, Ge L, Li T, Bu ZJ, Wang S, Wang Z, Liu Z, Liu S, Wang M. Does Shift in Vegetation Abundance After Nitrogen and Phosphorus Additions Play a Key Role in Regulating Fungal Community Structure in a Northern Peatland? Front Microbiol 2022; 13:920382. [PMID: 35756014 PMCID: PMC9224414 DOI: 10.3389/fmicb.2022.920382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 05/04/2022] [Indexed: 11/26/2022] Open
Abstract
Soil fungal communities are key players in biogeochemical processes of peatlands, which are important carbon stocks globally. Although it has been elucidated that fungi are susceptible to environmental changes, little is known about the intricate and interactive effect of long-term nitrogen (N) and phosphorus (P) enrichment on fungal community structure in northern peatlands. In this study, we compared a short- (2 years) with a long-term (10 years) fertilization experiment in a peatland complex in northeastern China to assess how N and/or P additions influence fungal community structure. The results showed that fungal community composition and diversity were altered by N addition, without a significant interactive effect with P addition. Not only the long-term but also the short-term nutrient addition could change the abundance of different plant functional types. However, there were no strong cascading effects on the fungal community in any of the fertilization experiments. Long-term nutrient addition showed a stronger effect on the relative abundance of different fungal functional guilds; an increase in the relative abundance of saprotrophs after fertilization did not jeopardize mycorrhizal fungi. Moreover, the decline in Sphagnum cover after long-term N addition did not parallel changes in the relative abundance of Sphagnum-associated fungi (Clavaria sphagnicola, Galerina tibiicystis, G. sphagnicola, and G. paludosa). Given that short- and long-term fertilization showed strongly contrasting effects on fungal community structure, our study highlights the necessity of assessing the long-term effects of nutrient enrichment on the association between vegetation and fungal community in peatland ecosystems. Future research priorities should emphasize the connection between the community structure of fungal functional guilds and their functionality, which is of paramount importance to better understand their influences on C storage in the face of uncertain N and P deposition regimes.
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Affiliation(s)
- Chenhao Cao
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, China
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun, China
| | - Jingjing Huang
- Center for Ecological Forecasting and Global Change, College of Forestry, Northwest A&F University, Xianyang, China
| | - Leming Ge
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, China
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun, China
| | - Tong Li
- School of Geographic Sciences, Hunan Normal University, Changsha, China
| | - Zhao-Jun Bu
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, China
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun, China
| | - Shengzhong Wang
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, China
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun, China
| | - Zucheng Wang
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, China
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun, China
| | - Ziping Liu
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, China
| | - Shasha Liu
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, China
| | - Meng Wang
- Key Laboratory of Geographical Processes and Ecological Security in Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, China
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Institute for Peat and Mire Research, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory for Wetland Ecological Processes and Environmental Change in the Changbai Mountains, Changchun, China
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47
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Maillard F, Fernandez CW, Mundra S, Heckman KA, Kolka RK, Kauserud H, Kennedy PG. Warming drives a 'hummockification' of microbial communities associated with decomposing mycorrhizal fungal necromass in peatlands. THE NEW PHYTOLOGIST 2022; 234:2032-2043. [PMID: 34559896 DOI: 10.1111/nph.17755] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 09/15/2021] [Indexed: 06/13/2023]
Abstract
Dead fungal mycelium (necromass) represents a critical component of soil carbon (C) and nutrient cycles. Assessing how the microbial communities associated with decomposing fungal necromass change as global temperatures rise will help in determining how these belowground organic matter inputs contribute to ecosystem responses. In this study, we characterized the structure of bacterial and fungal communities associated with multiple types of decaying mycorrhizal fungal necromass incubated within mesh bags across a 9°C whole ecosystem temperature enhancement in a boreal peatland. We found major taxonomic and functional shifts in the microbial communities present on decaying mycorrhizal fungal necromass in response to warming. These changes were most pronounced in hollow microsites, which showed convergence towards the necromass-associated microbial communities present in unwarmed hummocks. We also observed a high colonization of ericoid mycorrhizal fungal necromass by fungi from the same genera as the necromass. These results indicate that microbial communities associated with mycorrhizal fungal necromass decomposition are likely to change significantly with future climate warming, which may have strong impacts on soil biogeochemical cycles in peatlands. Additionally, the high enrichment of congeneric fungal decomposers on ericoid mycorrhizal necromass may help to explain the increase in ericoid shrub dominance in warming peatlands.
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Affiliation(s)
- François Maillard
- Department of Plant & Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
| | - Christopher W Fernandez
- Department of Plant & Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
- Department of Forestry, Michigan State University, East Lansing, MI, 48824, USA
| | - Sunil Mundra
- Section for Genetics and Evolutionary Biology (EvoGene), Department of Biosciences, University of Oslo, Oslo, NO-0316, Norway
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, Abu-Dhabi, UAE
| | | | - Randall K Kolka
- USDA Forest Service Northern Research Station, Grand Rapids, MN, 55744, USA
| | - Håvard Kauserud
- Section for Genetics and Evolutionary Biology (EvoGene), Department of Biosciences, University of Oslo, Oslo, NO-0316, Norway
| | - Peter G Kennedy
- Department of Plant & Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
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48
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Kutos S, Barnes EM, Bhutada A, Lewis JD. Preferential associations of soil fungal taxa under mixed compositions of eastern American tree species. FEMS Microbiol Ecol 2022; 98:6581587. [PMID: 35521705 DOI: 10.1093/femsec/fiac056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 04/12/2022] [Accepted: 05/04/2022] [Indexed: 11/14/2022] Open
Abstract
Soil fungi are vital to forest ecosystem function, in part through their role mediating tree responses to environmental factors, as well as directly through effects on resource cycling. While the distribution of soil fungi can vary with abiotic factors, plant species identity is also known to affect community composition. However, the particular influence that a plant will have on its soil microbiota remains difficult to predict. Here, we paired amplicon sequencing and enzymatic assays to assess soil fungal composition and function under three tree species, Quercus rubra, Betula nigra, and Acer rubrum, planted individually and in all combinations in a greenhouse. We observed that fungal communities differed between each of the individual planted trees, suggesting at least some fungal taxa may associate preferentially with these tree species. Additionally, fungal community composition under mixed-tree plantings broadly differed from the individual planted trees, suggesting mixing of these distinct soil fungal communities. The data also suggest that there were larger enzymatic activities in the individual plantings as compared to all mixed-tree plantings which may be due to variations in fungal community composition. This study provides further evidence of the importance of tree identity on soil microbiota and functional changes to forest soils.
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Affiliation(s)
- Steve Kutos
- Department of Biological Sciences, Fordham University, Bronx, NY 10458, USA.,Louis Calder Center - Biological Field Station, Fordham University, Armonk, NY 10504, USA
| | - Elle M Barnes
- Department of Biological Sciences, Fordham University, Bronx, NY 10458, USA.,Louis Calder Center - Biological Field Station, Fordham University, Armonk, NY 10504, USA
| | - Arnav Bhutada
- Department of Biological Sciences, Fordham University, Bronx, NY 10458, USA
| | - J D Lewis
- Department of Biological Sciences, Fordham University, Bronx, NY 10458, USA.,Louis Calder Center - Biological Field Station, Fordham University, Armonk, NY 10504, USA
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Alternative stable states of the forest mycobiome are maintained through positive feedbacks. Nat Ecol Evol 2022; 6:375-382. [PMID: 35210576 PMCID: PMC7612595 DOI: 10.1038/s41559-022-01663-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 01/04/2022] [Indexed: 02/03/2023]
Abstract
Most trees on Earth forms a symbiosis with either arbuscular mycorrhizal or ectomycorrhizal fungi. By forming common mycorrhizal networks, actively modifying the soil environment, and other ecological mechanisms - these contrasting symbioses may generate positive feedbacks that favor their own mycorrhizal strategy (i.e. the con-mycorrhizal strategy) at the expense of the alternative strategy. Positive con-mycorrhizal feedbacks set the stage for alternative stable states of forests and their fungi, where the presence of different forest mycorrhizal strategies is determined not only by external environmental conditions but also mycorrhiza-mediated feedbacks embedded within the forest ecosystem. Here we test this hypothesis using thousands of U.S. forest inventory sites to show arbuscular and ectomycorrhizal tree recruitment and survival exhibit positive con-mycorrhizal density dependence. Data-driven simulations show these positive feedbacks are sufficient in magnitude to generate and maintain alternative stable states of the forest mycobiome. Given the links between forest mycorrhizal strategy and carbon sequestration potential, the presence of mycorrhizal-mediated alternative stable states affects how we forecast forest composition, carbon sequestration and terrestrial climate feedbacks.
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50
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Life and death in the soil microbiome: how ecological processes influence biogeochemistry. Nat Rev Microbiol 2022; 20:415-430. [DOI: 10.1038/s41579-022-00695-z] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/20/2022] [Indexed: 12/18/2022]
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