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Harder CB, Hesling E, Botnen SS, Lorberau KE, Dima B, von Bonsdorff-Salminen T, Niskanen T, Jarvis SG, Ouimette A, Hester A, Hobbie EA, Taylor AFS, Kauserud H. Mycena species can be opportunist-generalist plant root invaders. Environ Microbiol 2023; 25:1875-1893. [PMID: 37188366 DOI: 10.1111/1462-2920.16398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 04/27/2023] [Indexed: 05/17/2023]
Abstract
Traditional strict separation of fungi into ecological niches as mutualist, parasite or saprotroph is increasingly called into question. Sequences of assumed saprotrophs have been amplified from plant root interiors, and several saprotrophic genera can invade and interact with host plants in laboratory growth experiments. However, it is uncertain if root invasion by saprotrophic fungi is a widespread phenomenon and if laboratory interactions mirror field conditions. Here, we focused on the widespread and speciose saprotrophic genus Mycena and performed (1) a systematic survey of their occurrences (in ITS1/ITS2 datasets) in mycorrhizal roots of 10 plant species, and (2) an analysis of natural abundances of 13 C/15 N stable isotope signatures of Mycena basidiocarps from five field locations to examine their trophic status. We found that Mycena was the only saprotrophic genus consistently found in 9 out of 10 plant host roots, with no indication that the host roots were senescent or otherwise vulnerable. Furthermore, Mycena basidiocarps displayed isotopic signatures consistent with published 13 C/15 N profiles of both saprotrophic and mutualistic lifestyles, supporting earlier laboratory-based studies. We argue that Mycena are widespread latent invaders of healthy plant roots and that Mycena species may form a spectrum of interactions besides saprotrophy also in the field.
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Affiliation(s)
- Christoffer Bugge Harder
- Department of Biosciences, University of Oslo, Oslo, Norway
- Department of Microbial Ecology, Lund University, Lund, Sweden
- Department of Biology, Section of Terrestrial Ecology, University of Copenhagen, Copenhagen, Denmark
| | - Emily Hesling
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | - Synnøve S Botnen
- Department of Biosciences, University of Oslo, Oslo, Norway
- Oslo Metropolitan University, Oslo, Norway
| | - Kelsey E Lorberau
- Department of Biosciences, University of Oslo, Oslo, Norway
- Department of Arctic and Marine Biology, UiT-The Arctic University of Norway, Tromsø, Norway
| | - Bálint Dima
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Budapest, Hungary
- Botany Unit, Finnish Museum of Natural History LUOMUS, University of Helsinki, Helsinki, Finland
| | | | - Tuula Niskanen
- Botany Unit, Finnish Museum of Natural History LUOMUS, University of Helsinki, Helsinki, Finland
- Jodrell Laboratory, Royal Botanic Gardens, Kew, Surrey, UK
| | | | - Andrew Ouimette
- Earth Systems Research Center, University of New Hampshire, Durham, New Hampshire, USA
| | | | - Erik A Hobbie
- Earth Systems Research Center, University of New Hampshire, Durham, New Hampshire, USA
| | - Andy F S Taylor
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
- The James Hutton Institute, Aberdeen, UK
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Purahong W, Tanunchai B, Muszynski S, Maurer F, Wahdan SFM, Malter J, Buscot F, Noll M. Cross-kingdom interactions and functional patterns of active microbiota matter in governing deadwood decay. Proc Biol Sci 2022; 289:20220130. [PMID: 35538788 PMCID: PMC9091849 DOI: 10.1098/rspb.2022.0130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Microbial community members are the primary microbial colonizers and active decomposers of deadwood. This study placed sterilized standardized beech and spruce sapwood specimens on the forest ground of 8 beech- and 8 spruce-dominated forest sites. After 370 days, specimens were assessed for mass loss, nitrogen (N) content and 15N isotopic signature, hydrolytic and lignin-modifying enzyme activities. Each specimen was incubated with bromodeoxyuridine (BrdU) to label metabolically active fungal and bacterial community members, which were assessed using amplicon sequencing. Fungal saprotrophs colonized the deadwood accompanied by a distinct bacterial community that was capable of cellulose degradation, aromatic depolymerization, and N2 fixation. The latter were governed by the genus Sphingomonas, which was co-present with the majority of saprotrophic fungi regardless of whether beech or spruce specimens were decayed. Moreover, the richness of the diazotrophic Allorhizobium-Neorhizobium-Pararhizobium-Rhizobium group was significantly correlated with mass loss, N content and 15N isotopic signature. By contrast, presence of obligate predator Bdellovibrio spp. shifted bacterial community composition and were linked to decreased beech deadwood decay rates. Our study provides the first account of the composition and function of metabolically active wood-colonizing bacterial and fungal communities, highlighting cross-kingdom interactions during the early and intermediate stages of wood decay.
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Affiliation(s)
- Witoon Purahong
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, D-06120 Halle (Saale), Germany
| | - Benjawan Tanunchai
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, D-06120 Halle (Saale), Germany.,Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, 95440, Bayreuth, Germany
| | - Sarah Muszynski
- Institute for Bioanalysis, Coburg University of Applied Sciences and Arts, 96450 Coburg, Germany
| | - Florian Maurer
- Institute for Bioanalysis, Coburg University of Applied Sciences and Arts, 96450 Coburg, Germany
| | - Sara Fareed Mohamed Wahdan
- Department of Soil Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, D-06120 Halle (Saale), Germany.,Department of Botany, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
| | - Jonas Malter
- Institute for Bioanalysis, Coburg University of Applied Sciences and Arts, 96450 Coburg, Germany
| | - François Buscot
- Department of Soil 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, Deutscher Platz 5e, D-04103 Leipzig, Germany
| | - Matthias Noll
- Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, 95440, Bayreuth, Germany.,Institute for Bioanalysis, Coburg University of Applied Sciences and Arts, 96450 Coburg, Germany
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Zhang H, Hobbie EA, Feng P, Niu L, Hu K. Can conservation agriculture mitigate climate change and reduce environmental impacts for intensive cropping systems in North China Plain? THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:151194. [PMID: 34699820 DOI: 10.1016/j.scitotenv.2021.151194] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/17/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
Determining appropriate farming management practices to adapt to climate change with lower environmental costs is important for sustainable agricultural production. In this study, a long-term experiment (1985-2019) was conducted under different management practices combining fertilization rate (no, low and high N fertilizer, N0, N1 and N2), straw additions (no, low and high addition, S0, S1 and S2) with conservation tillage (no-tillage, NT) in the North China Plain (NCP). The Denitrification-Decomposition (DNDC) model was firstly evaluated using the experimental data, and then applied to simulate the changes of crop yields, soil organic carbon (SOC), and N2O emissions under different management practices combined with climate change scenarios, under low and high emission scenarios of societal development pathways (SSP245 and SSP585, respectively) with climate projections from 2031 to 2100. Under the low emission scenario (SSP245), wheat yields were the highest with the NT-N1-S2 treatment (a 23% increase relative to the baseline (1981-2010)). For maize yields, the NT-N1-S1 treatment increased 46% relative to baseline under the SSP585, whereas, the yields increased less in all treatments under SSP245-2040s. The SOC was predicted to increase by 6-60% by 2100 under SSP245. Straw addition and tillage were the main factors influencing SOC. N fertilizer was the most important driver for wheat and maize yields, however, N2O emissions from soil increased with increased application of N fertilizer. Therefore, the no-tillage method under low N fertilizer and high straw addition (NT-N1-S2) is recommended to promote crop yields and substantially increase SOC under SSP245 and SSP585. Conservation agriculture practices can potentially offset crop yield reductions, increase soil quality, and reduce greenhouse gas emissions in the NCP, and ensure crop production to meet the growing demand for food under future climate change.
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Affiliation(s)
- Huayan Zhang
- College of Land Science and Technology, China Agricultural University, Beijing 100193, PR China
| | - Erik A Hobbie
- Earth Systems Research Center, University of New Hampshire, Durham, NH 03824, USA
| | - Puyu Feng
- College of Land Science and Technology, China Agricultural University, Beijing 100193, PR China
| | - Ling'an Niu
- College of Land Science and Technology, China Agricultural University, Beijing 100193, PR China
| | - Kelin Hu
- College of Land Science and Technology, China Agricultural University, Beijing 100193, PR China.
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Hobbie E, Rinne-Garmston (Rinne) K, Penttilä R, Vadeboncoeur M, Chen J, Mäkipää R. Carbon and nitrogen acquisition strategies by wood decay fungi influence their isotopic signatures in Picea abies forests. FUNGAL ECOL 2021. [DOI: 10.1016/j.funeco.2021.101069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hatté C, Zazzo A, Selosse MA. The radiocarbon age of mycoheterotrophic plants. THE NEW PHYTOLOGIST 2020; 227:1284-1288. [PMID: 32441806 DOI: 10.1111/nph.16637] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- Christine Hatté
- Laboratoire des Sciences du Climat et de l'Environnement, UMR 8212 CEA CNRS UVSQ, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
| | - Antoine Zazzo
- Archéozoologie, Archéobotanique: Sociétés, Pratiques et Environnements (AASPE), Muséum National d'Histoire Naturelle, CNRS, CP56, 55 rue Buffon, 75005, Paris, France
| | - Marc-André Selosse
- Institut de Systématique, Evolution, Biodiversité (ISYEB - UMR 7205 - CNRS, MNHN, SU, EPHE), Muséum National d'Histoire Naturelle, 57 rue Cuvier, 75005, Paris, France
- Faculty of Biology, University of Gdańsk, ul. Wita Stwosza 59, 80-308, Gdańsk, Poland
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