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Mayerhofer W, Schintlmeister A, Dietrich M, Gorka S, Wiesenbauer J, Martin V, Gabriel R, Reipert S, Weidinger M, Clode P, Wagner M, Woebken D, Richter A, Kaiser C. Recently photoassimilated carbon and fungus-delivered nitrogen are spatially correlated in the ectomycorrhizal tissue of Fagus sylvatica. THE NEW PHYTOLOGIST 2021; 232:2457-2474. [PMID: 34196001 PMCID: PMC9291818 DOI: 10.1111/nph.17591] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/01/2021] [Indexed: 05/04/2023]
Abstract
Ectomycorrhizal plants trade plant-assimilated carbon for soil nutrients with their fungal partners. The underlying mechanisms, however, are not fully understood. Here we investigate the exchange of carbon for nitrogen in the ectomycorrhizal symbiosis of Fagus sylvatica across different spatial scales from the root system to the cellular level. We provided 15 N-labelled nitrogen to mycorrhizal hyphae associated with one half of the root system of young beech trees, while exposing plants to a 13 CO2 atmosphere. We analysed the short-term distribution of 13 C and 15 N in the root system with isotope-ratio mass spectrometry, and at the cellular scale within a mycorrhizal root tip with nanoscale secondary ion mass spectrometry (NanoSIMS). At the root system scale, plants did not allocate more 13 C to root parts that received more 15 N. Nanoscale secondary ion mass spectrometry imaging, however, revealed a highly heterogenous, and spatially significantly correlated distribution of 13 C and 15 N at the cellular scale. Our results indicate that, on a coarse scale, plants do not allocate a larger proportion of photoassimilated C to root parts associated with N-delivering ectomycorrhizal fungi. Within the ectomycorrhizal tissue, however, recently plant-assimilated C and fungus-delivered N were spatially strongly coupled. Here, NanoSIMS visualisation provides an initial insight into the regulation of ectomycorrhizal C and N exchange at the microscale.
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Affiliation(s)
- Werner Mayerhofer
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
| | - Arno Schintlmeister
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
- Large‐Instrument Facility for Environmental and Isotope Mass SpectrometryUniversity of ViennaViennaA‐1030Austria
| | - Marlies Dietrich
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
| | - Stefan Gorka
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
| | - Julia Wiesenbauer
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
| | - Victoria Martin
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
| | - Raphael Gabriel
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
| | - Siegfried Reipert
- Core Facility Cell Imaging and Ultrastructure ResearchUniversity of ViennaViennaA‐1030Austria
| | - Marieluise Weidinger
- Core Facility Cell Imaging and Ultrastructure ResearchUniversity of ViennaViennaA‐1030Austria
| | - Peta Clode
- Centre for Microscopy, Characterisation & AnalysisUniversity of Western AustraliaPerthWA6009Australia
| | - Michael Wagner
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
- Large‐Instrument Facility for Environmental and Isotope Mass SpectrometryUniversity of ViennaViennaA‐1030Austria
- Department of Chemistry and BioscienceAalborg UniversityAalborgDK‐9220Denmark
| | - Dagmar Woebken
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
| | - Andreas Richter
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
| | - Christina Kaiser
- Centre for Microbiology and Environmental Systems ScienceUniversity of ViennaViennaA‐1030Austria
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Mayerhofer W, Schintlmeister A, Dietrich M, Gorka S, Wiesenbauer J, Martin V, Gabriel R, Reipert S, Weidinger M, Clode P, Wagner M, Woebken D, Richter A, Kaiser C. Recently photoassimilated carbon and fungus-delivered nitrogen are spatially correlated in the ectomycorrhizal tissue of Fagus sylvatica. THE NEW PHYTOLOGIST 2021; 232:2457-2474. [PMID: 34196001 DOI: 10.5281/zenodo.5035482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/01/2021] [Indexed: 05/21/2023]
Abstract
Ectomycorrhizal plants trade plant-assimilated carbon for soil nutrients with their fungal partners. The underlying mechanisms, however, are not fully understood. Here we investigate the exchange of carbon for nitrogen in the ectomycorrhizal symbiosis of Fagus sylvatica across different spatial scales from the root system to the cellular level. We provided 15 N-labelled nitrogen to mycorrhizal hyphae associated with one half of the root system of young beech trees, while exposing plants to a 13 CO2 atmosphere. We analysed the short-term distribution of 13 C and 15 N in the root system with isotope-ratio mass spectrometry, and at the cellular scale within a mycorrhizal root tip with nanoscale secondary ion mass spectrometry (NanoSIMS). At the root system scale, plants did not allocate more 13 C to root parts that received more 15 N. Nanoscale secondary ion mass spectrometry imaging, however, revealed a highly heterogenous, and spatially significantly correlated distribution of 13 C and 15 N at the cellular scale. Our results indicate that, on a coarse scale, plants do not allocate a larger proportion of photoassimilated C to root parts associated with N-delivering ectomycorrhizal fungi. Within the ectomycorrhizal tissue, however, recently plant-assimilated C and fungus-delivered N were spatially strongly coupled. Here, NanoSIMS visualisation provides an initial insight into the regulation of ectomycorrhizal C and N exchange at the microscale.
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Affiliation(s)
- Werner Mayerhofer
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
| | - Arno Schintlmeister
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
- Large-Instrument Facility for Environmental and Isotope Mass Spectrometry, University of Vienna, Vienna, A-1030, Austria
| | - Marlies Dietrich
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
| | - Stefan Gorka
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
| | - Julia Wiesenbauer
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
| | - Victoria Martin
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
| | - Raphael Gabriel
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
| | - Siegfried Reipert
- Core Facility Cell Imaging and Ultrastructure Research, University of Vienna, Vienna, A-1030, Austria
| | - Marieluise Weidinger
- Core Facility Cell Imaging and Ultrastructure Research, University of Vienna, Vienna, A-1030, Austria
| | - Peta Clode
- Centre for Microscopy, Characterisation & Analysis, University of Western Australia, Perth, WA, 6009, Australia
| | - Michael Wagner
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
- Large-Instrument Facility for Environmental and Isotope Mass Spectrometry, University of Vienna, Vienna, A-1030, Austria
- Department of Chemistry and Bioscience, Aalborg University, Aalborg, DK-9220, Denmark
| | - Dagmar Woebken
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
| | - Andreas Richter
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
| | - Christina Kaiser
- Centre for Microbiology and Environmental Systems Science, University of Vienna, Vienna, A-1030, Austria
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