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You YH, Park JM, Ku YB, Jeong TY, Lim K, Shin JH, Kim JS, Hong JW. Fungal Microbiome of Alive and Dead Korean Fir in its Native Habitats. MYCOBIOLOGY 2024; 52:68-84. [PMID: 38415173 PMCID: PMC10896143 DOI: 10.1080/12298093.2024.2307117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 01/15/2024] [Indexed: 02/29/2024]
Abstract
A rapid decline of Abies koreana has been reported in most of the natural alpine habitats in Korea. It is generally accepted that this phenomenon is due to climate change even though no clear conclusions have been drawn. Most research has focused on abiotic environmental factors, but studies on the relationships between A. koreana and soil fungal microbiomes are scarce. In this study, the rhizoplane and rhizosphere fungal communities in the alive and dead Korean fir trees from its three major natural habitats including Mt. Deogyu, Mt. Halla, and Mt. Jiri in Korea were investigated to identify specific soil fungal groups closely associated with A. koreana. Soil fungal diversity in each study site was significantly different from another based on the beta diversity calculations. Heat tree analysis at the genus level showed that Clavulina, Beauveria, and Tomentella were most abundant in the healthy trees probably by forming ectomycorrhizae with Korean fir growth and controlling pests and diseases. However, Calocera, Dacrymyces, Gyoerffyella, Hydnotrya, Microdochium, Hyaloscypha, Mycosymbioces, and Podospora were abundant in the dead trees. Our findings suggested that Clavulina, Beauveria, and Tomentella are the major players that could be considered in future reforestation programs to establish ectomycorrhizal networks and promote growth. These genera may have played a significant role in the survival and growth of A. koreana in its natural habitats. In particular, the genus Gyoerffyella may account for the death of the seedlings. Our work presented exploratory research on the specific fungal taxa associated with the status of A. koreana.
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Affiliation(s)
- Young-Hyun You
- Biological Resources Utilization Division, National Institute of Biological Resources, Incheon, Republic of Korea
| | - Jong Myong Park
- Water Quality Research Institute, Waterworks Headquarters Incheon Metropolitan City, Incheon, Republic of Korea
| | - Youn-Bong Ku
- Biological Resources Utilization Division, National Institute of Biological Resources, Incheon, Republic of Korea
| | - Tae-Yong Jeong
- Department of Environmental Science, College of Natural Sciences, Hankuk University of Foreign Studies, Yongin, Republic of Korea
| | - Kyeongmo Lim
- Department of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Jae-Ho Shin
- Department of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Jin-Suk Kim
- Korea Fern Research Society, Seoul, Republic of Korea
| | - Ji Won Hong
- Department of Hydrogen and Renewable Energy, Kyungpook National University, Daegu, Republic of Korea
- Advanced Bio-resource Research Center, Kyungpook National University, Daegu, Republic of Korea
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Thielicke M, Ahlborn J, Eichler-Löbermann B, Eulenstein F. On the Negative Impact of Mycorrhiza Application on Maize Plants ( Zea mays) Amended with Mineral and Organic Fertilizer. Microorganisms 2023; 11:1663. [PMID: 37512836 PMCID: PMC10384619 DOI: 10.3390/microorganisms11071663] [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: 05/11/2023] [Revised: 06/19/2023] [Accepted: 06/20/2023] [Indexed: 07/30/2023] Open
Abstract
Many studies describe the positive effect of mycorrhiza, but few report on negative effects. Furthermore, there is a research gap on the mechanisms under which conditions the symbiotic mycorrhizal plant interaction or a parasitic one predominates. The study was conducted as a field experiment over three years to investigate the effect of mycorrhiza (Rhizoglomus intraradices) and soil bacteria applications on fertile soil. A standard fertilizer (diammonium phosphate) and two microgranular fertilizers (mineral and organomineral) were applied alone or in combination with the biostimulants mycorrhiza and/or soil bacteria (Bacillus velezensis). The application of the mycorrhiza as the only biostimulant resulted in lower yields compared to all fertilizer variants without the mycorrhiza or with mycorrhiza in combination with soil bacteria in the dry years 2015 (p = 0.0241) and 2016 (p = 0.0003). The usage of soil bacteria alone, or soil bacteria with fertilizer, resulted in few occasional significant differences. The combination with soil bacteria raised the yield of mycorrhiza-treated fertilizer variants to a significant extent in 2015 (p = 0.0007) and 2016 (p = 0.0019). The negative effects of mycorrhiza application in this study were alleviated by the simultaneous use of soil bacteria. Treatments with organomineral microgranular fertilizer, which were expected to promote the naturally occurring soil microbiome more than the mineral fertilizer variants, were most negatively affected by the mycorrhiza. We hypothesize that the naturally occurring microbiome of the study site was already optimal for maize plants, and thus the successful introduction of other microorganisms through the application of the mycorrhiza and soil bacteria tended not to be beneficial. The present study is the first report on the negative influence of arbuscular mycorrhiza on maize yields gained with a standard fertilizer (diammonium phosphate) and two microgranular fertilizer, and the alleviation of that impact by combined application of soil bacteria. We conclude that the application of the used biostimulants may have negative impacts on maize yield if the soil is already rich in nutrients and water is the limiting factor.
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Affiliation(s)
- Matthias Thielicke
- Department Sustainable Grassland Systems, Leibniz Center for Agricultural Landscape Research (ZALF), Gutshof 7, 14641 Paulinenaue, Germany
| | - Julian Ahlborn
- Botany Division, Senckenberg Museum of Natural History Görlitz, Am Museum 1, 02806 Görlitz, Germany
| | - Bettina Eichler-Löbermann
- Department of Agronomy and Crop Science, Faculty of Agricultural and Environmental Sciences, University of Rostock, 18051 Rostock, Germany
| | - Frank Eulenstein
- Department Sustainable Grassland Systems, Leibniz Center for Agricultural Landscape Research (ZALF), Gutshof 7, 14641 Paulinenaue, Germany
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Zhang H, Churchill AC, Anderson IC, Igwenagu C, Power SA, Plett JM, Macdonald CA, Pendall E, Carrillo Y, Powell JR. Ecological stoichiometry and fungal community turnover reveal variation among mycorrhizal partners in their responses to warming and drought. Mol Ecol 2023; 32:229-243. [PMID: 34779067 DOI: 10.1111/mec.16278] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/24/2021] [Accepted: 10/26/2021] [Indexed: 12/29/2022]
Abstract
Symbiotic fungi mediate important energy and nutrient transfers in terrestrial ecosystems. Environmental change can lead to shifts in communities of symbiotic fungi, but the consequences of these shifts for nutrient dynamics among symbiotic partners are poorly understood. Here, we assessed variation in carbon (C), nitrogen (N) and phosphorus (P) in tissues of arbuscular mycorrhizal (AM) fungi and a host plant (Medicago sativa) in response to experimental warming and drought. We linked compositional shifts in AM fungal communities in roots and soil to variation in hyphal chemistry by using high-throughput DNA sequencing and joint species distribution modelling. Compared to plants, AM hyphae was 43% lower in (C) and 24% lower in (N) but more than nine times higher in (P), with significantly lower C:N, C:P and N:P ratios. Warming and drought resulted in increases in (P) and reduced C:P and N:P ratios in all tissues, indicating fungal P accumulation was exacerbated by climate-associated stress. Warming and drought modified the composition of AM fungal communities, and many of the AM fungal genera that were linked to shifts in mycelial chemistry were also negatively impacted by climate variation. Our study offers a unified framework to link climate change, fungal community composition, and community-level functional traits. Thus, our study provides insight into how environmental change can alter ecosystem functions via the promotion or reduction of fungal taxa with different stoichiometric characteristics and responses.
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Affiliation(s)
- Haiyang Zhang
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
| | - Amber C Churchill
- Department of Ecology, Evolution and Behavior, University of Minnesota, St. Paul, Minnesota, USA
| | - Ian C Anderson
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
| | - Chioma Igwenagu
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
| | - Sally A Power
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
| | - Jonathan M Plett
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
| | - Catriona A Macdonald
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
| | - Elise Pendall
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
| | - Yolima Carrillo
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
| | - Jeff R Powell
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, New South Wales, Australia
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Duc NH, Vo HTN, van Doan C, Hamow KÁ, Le KH, Posta K. Volatile organic compounds shape belowground plant-fungi interactions. FRONTIERS IN PLANT SCIENCE 2022; 13:1046685. [PMID: 36561453 PMCID: PMC9763900 DOI: 10.3389/fpls.2022.1046685] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/09/2022] [Indexed: 06/17/2023]
Abstract
Volatile organic compounds (VOCs), a bouquet of chemical compounds released by all life forms, play essential roles in trophic interactions. VOCs can facilitate a large number of interactions with different organisms belowground. VOCs-regulated plant-plant or plant-insect interaction both below and aboveground has been reported extensively. Nevertheless, there is little information about the role of VOCs derived from soilborne pathogenic fungi and beneficial fungi, particularly mycorrhizae, in influencing plant performance. In this review, we show how plant VOCs regulate plant-soilborne pathogenic fungi and beneficial fungi (mycorrhizae) interactions. How fungal VOCs mediate plant-soilborne pathogenic and beneficial fungi interactions are presented and the most common methods to collect and analyze belowground volatiles are evaluated. Furthermore, we suggest a promising method for future research on belowground VOCs.
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Affiliation(s)
- Nguyen Hong Duc
- Institute of Genetics and Biotechnology, Department of Microbiology and Applied Biotechnology, Hungarian University of Agriculture and Life Sciences (MATE), Godollo, Hungary
| | - Ha T. N. Vo
- Plant Disease Laboratory, Department of Plant Protection, Faculty of Agronomy, Nong Lam University, Ho Chi Minh, Vietnam
| | - Cong van Doan
- Molecular Interaction Ecology, German Centre for Integrative Biodiversity Research (iDIV), Leipzig, Germany
| | - Kamirán Áron Hamow
- Agricultural Institute, Centre for Agricultural Research, Martonvásár, Hungary
| | - Khac Hoang Le
- Plant Disease Laboratory, Department of Plant Protection, Faculty of Agronomy, Nong Lam University, Ho Chi Minh, Vietnam
| | - Katalin Posta
- Institute of Genetics and Biotechnology, Department of Microbiology and Applied Biotechnology, Hungarian University of Agriculture and Life Sciences (MATE), Godollo, Hungary
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Sakamoto Y, Sato S, Takizawa M, Narimatsu M. Identification of up-regulated genes in Tricholoma matsutake mycorrhiza. FEMS Microbiol Lett 2022; 369:6678003. [PMID: 36029515 DOI: 10.1093/femsle/fnac085] [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: 09/30/2021] [Revised: 06/23/2022] [Accepted: 08/25/2022] [Indexed: 11/12/2022] Open
Abstract
Many plant roots associate with fungi to form mycorrhizae; tree roots especially associate with ectomycorrhizal fungi, such as Tricholoma species. Tricholoma matsutake is an economically important fungus in Asian countries and usually inhabits forests primarily composed of Pinus densiflora (Japanese red pine). In this study, to understand the mycorrhizal association between T. matsutake and P. densiflora, genes specifically expressed in mycorrhiza compared with those expressed in mycelia and fruiting bodies were identified by RNA-seq. This revealed that genes for chromatin, proteasomes, signal transduction, pheromones, cell surface receptors, cytoskeleton, RNA processing, and transporters from T. matsutake were highly expressed in mycorrhiza. It also identified 35 mycorrhiza-induced small secreted protein (MiSSPs) that were highly expressed in mycorrhiza. Meanwhile, genes for proteases, defence-related proteins, cell-wall degradation, signal transduction, pinene synthesis, plant hormones, and transporters from P. densiflora were highly expressed in mycorrhiza. These genes may be involved in mycorrhizal formation and maintenance. A MiSSP, 1 460 819, was highly expressed in mycorrhiza, and this expression was maintained for 24 months. These results provide insight into the mycorrhizal association between T. matsutake and P. densiflora.
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Affiliation(s)
- Yuichi Sakamoto
- Iwate Biotechnology Research Center, 22-174-4 Narita, Kitakami-shi, Iwate 024-0003, Japan
| | - Shiho Sato
- Iwate Biotechnology Research Center, 22-174-4 Narita, Kitakami-shi, Iwate 024-0003, Japan
| | - Miyuki Takizawa
- Iwate Biotechnology Research Center, 22-174-4 Narita, Kitakami-shi, Iwate 024-0003, Japan
| | - Maki Narimatsu
- Iwate Prefectural Forest Technology Center, 560-11 Kemuyama, Yahaba, Iwate 028-3623, Japan
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Maltz MR, Carey CJ, Freund HL, Botthoff JK, Hart SC, Stajich JE, Aarons SM, Aciego SM, Blakowski M, Dove NC, Barnes ME, Pombubpa N, Aronson EL. Landscape Topography and Regional Drought Alters Dust Microbiomes in the Sierra Nevada of California. Front Microbiol 2022; 13:856454. [PMID: 35836417 PMCID: PMC9274194 DOI: 10.3389/fmicb.2022.856454] [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: 01/17/2022] [Accepted: 03/22/2022] [Indexed: 11/13/2022] Open
Abstract
Dust provides an ecologically significant input of nutrients, especially in slowly eroding ecosystems where chemical weathering intensity limits nutrient inputs from underlying bedrock. In addition to nutrient inputs, incoming dust is a vector for dispersing dust-associated microorganisms. While little is known about dust-microbial dispersal, dust deposits may have transformative effects on ecosystems far from where the dust was emitted. Using molecular analyses, we examined spatiotemporal variation in incoming dust microbiomes along an elevational gradient within the Sierra Nevada of California. We sampled throughout two dry seasons and found that dust microbiomes differed by elevation across two summer dry seasons (2014 and 2015), which corresponded to competing droughts in dust source areas. Dust microbial taxa richness decreased with elevation and was inversely proportional to dust heterogeneity. Likewise, dust phosphorus content increased with elevation. At lower elevations, early season dust microbiomes were more diverse than those found later in the year. The relative abundances of microbial groups shifted during the summer dry season. Furthermore, mutualistic fungal diversity increased with elevation, which may have corresponded with the biogeography of their plant hosts. Although dust fungal pathogen diversity was equivalent across elevations, elevation and sampling month interactions for the relative abundance, diversity, and richness of fungal pathogens suggest that these pathogens differed temporally across elevations, with potential implications for humans and wildlife. This study shows that landscape topography and droughts in source locations may alter the composition and diversity of ecologically relevant dust-associated microorganisms.
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Affiliation(s)
- Mia R. Maltz
- Division of Biomedical Sciences, University of California, Riverside, Riverside, CA, United States
- Department of Microbiology and Plant Pathology, University of California, Riverside, Riverside, CA, United States
- Center for Conservation Biology, University of California, Riverside, Riverside, CA, United States
- BREATHE Center, University of California, Riverside, Riverside, CA, United States
| | - Chelsea J. Carey
- Point Blue Conservation Sciences, Petaluma, CA, United States
- Genetics, Genomics, and Bioinformatics Program, University of California, Riverside, Riverside, CA, United States
| | - Hannah L. Freund
- Genetics, Genomics, and Bioinformatics Program, University of California, Riverside, Riverside, CA, United States
| | - Jon K. Botthoff
- Center for Conservation Biology, University of California, Riverside, Riverside, CA, United States
| | - Stephen C. Hart
- Sierra Nevada Research Institute, University of California, Merced, Merced, CA, United States
- Department of Life and Environmental Sciences, University of California, Merced, Merced, CA, United States
| | - Jason E. Stajich
- Department of Microbiology and Plant Pathology, University of California, Riverside, Riverside, CA, United States
- Genetics, Genomics, and Bioinformatics Program, University of California, Riverside, Riverside, CA, United States
| | - Sarah M. Aarons
- Scripps Institution of Oceanography, University of California, San Diego, San Diego, CA, United States
| | - Sarah M. Aciego
- Department of Geology and Geophysics, University of Wyoming, Laramie, WY, United States
- Noctilucent Aviation, Bridgeport, TX, United States
| | - Molly Blakowski
- Department of Watershed Science, Utah State University, Logan, UT, United States
| | - Nicholas C. Dove
- Sierra Nevada Research Institute, University of California, Merced, Merced, CA, United States
- Environmental Systems Graduate Group, University of California, Merced, Merced, CA, United States
- Oak Ridge National Laboratory, Biosciences Division, Oak Ridge, TN, United States
| | - Morgan E. Barnes
- Sierra Nevada Research Institute, University of California, Merced, Merced, CA, United States
- Environmental Systems Graduate Group, University of California, Merced, Merced, CA, United States
- Pacific Northwest National Laboratory, Biological Sciences, Richland, WA, United States
| | - Nuttapon Pombubpa
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Emma L. Aronson
- Department of Microbiology and Plant Pathology, University of California, Riverside, Riverside, CA, United States
- Center for Conservation Biology, University of California, Riverside, Riverside, CA, United States
- BREATHE Center, University of California, Riverside, Riverside, CA, United States
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Bell CA, Magkourilou E, Urwin PE, Field KJ. Disruption of carbon for nutrient exchange between potato and arbuscular mycorrhizal fungi enhanced cyst nematode fitness and host pest tolerance. THE NEW PHYTOLOGIST 2022; 234:269-279. [PMID: 35020195 PMCID: PMC9304131 DOI: 10.1111/nph.17958] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Plants simultaneously interact with a range of biotrophic symbionts, ranging from mutualists such as arbuscular mycorrhizal fungi (AMF), to parasites such as the potato cyst nematode (PCN). The exchange of mycorrhizal-acquired nutrients for plant-fixed carbon (C) is well studied; however, the impact of competing symbionts remains underexplored. In this study, we examined mycorrhizal nutrient and host resource allocation in potato with and without AMF and PCN using radioisotope tracing, whilst determining the consequences of such allocation. The presence of PCN disrupted C for nutrient exchange between plants and AMF, with plant C overwhelmingly obtained by the nematodes. Despite this, AMF maintained transfer of nutrients on PCN-infected potato, ultimately losing out in their C for nutrient exchange with the host. Whilst PCN exploited the greater nutrient reserves to drive population growth on AMF-potato, the fungus imparted tolerance to allow the host to bear the parasitic burden. Our findings provide important insights into the belowground dynamics of plant-AMF symbioses, where simultaneous nutritional and nonnutritional benefits conferred by AMF to hosts and their parasites are seldom considered in plant community dynamics. Our findings suggest this may be a critical oversight, particularly in the consideration of C and nutrient flows in plant and soil communities.
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Affiliation(s)
- Christopher A. Bell
- Faculty of Biological SciencesSchool of BiologyUniversity of LeedsLeedsLS2 9JTUK
| | - Emily Magkourilou
- Faculty of Biological SciencesSchool of BiologyUniversity of LeedsLeedsLS2 9JTUK
- Plants, Photosynthesis and SoilSchool of BiosciencesUniversity of SheffieldSheffieldS10 2TNUK
| | - P. E. Urwin
- Faculty of Biological SciencesSchool of BiologyUniversity of LeedsLeedsLS2 9JTUK
| | - Katie J. Field
- Plants, Photosynthesis and SoilSchool of BiosciencesUniversity of SheffieldSheffieldS10 2TNUK
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Aavik T, Träger S, Zobel M, Honnay O, Van Geel M, Bueno CG, Koorem K. The joint effect of host plant genetic diversity and arbuscular mycorrhizal fungal communities on restoration success. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tsipe Aavik
- Department of Botany Institute of Ecology and Earth Sciences University of Tartu Tartu Estonia
| | - Sabrina Träger
- Department of Botany Institute of Ecology and Earth Sciences University of Tartu Tartu Estonia
- Institute of Biology/Geobotany and Botanical Garden Martin‐Luther‐University Halle‐Wittenberg Halle (Saale) Germany
| | - Martin Zobel
- Department of Botany Institute of Ecology and Earth Sciences University of Tartu Tartu Estonia
| | - Olivier Honnay
- Plant Conservation and Population Biology Biology Department University of Leuven Heverlee Belgium
| | - Maarten Van Geel
- Plant Conservation and Population Biology Biology Department University of Leuven Heverlee Belgium
| | - C. Guillermo Bueno
- Department of Botany Institute of Ecology and Earth Sciences University of Tartu Tartu Estonia
| | - Kadri Koorem
- Department of Botany Institute of Ecology and Earth Sciences University of Tartu Tartu Estonia
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de la Riva EG, Querejeta JI, Villar R, Pérez-Ramos IM, Marañón T, Galán Díaz J, de Tomás Marín S, Prieto I. The Economics Spectrum Drives Root Trait Strategies in Mediterranean Vegetation. FRONTIERS IN PLANT SCIENCE 2021; 12:773118. [PMID: 34887894 PMCID: PMC8649719 DOI: 10.3389/fpls.2021.773118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 10/27/2021] [Indexed: 06/02/2023]
Abstract
Extensive research efforts are devoted to understand fine root trait variation and to confirm the existence of a belowground root economics spectrum (RES) from acquisitive to conservative root strategies that is analogous to the leaf economics spectrum (LES). The economics spectrum implies a trade-off between maximizing resource acquisition and productivity or maximizing resource conservation and longevity; however, this theoretical framework still remains controversial for roots. We compiled a database of 320 Mediterranean woody and herbaceous species to critically assess if the classic economics spectrum theory can be broadly extended to roots. Fine roots displayed a wide diversity of forms and properties in Mediterranean vegetation, resulting in a multidimensional trait space. The main trend of variation in this multidimensional root space is analogous to the main axis of LES, while the second trend of variation is partially determined by an anatomical trade-off between tissue density and diameter. Specific root area (SRA) is the main trait explaining species distribution along the RES, regardless of the selected traits. We advocate for the need to unify and standardize the criteria and approaches used within the economics framework between leaves and roots, for the sake of theoretical consistency.
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Affiliation(s)
| | - José Ignacio Querejeta
- Departamento de Conservación de Suelos y Agua, Centro de Edafología y Biología Aplicada del Segura – Consejo Superior de Investigaciones Científicas (CEBAS-CSIC), Murcia, Spain
| | - Rafael Villar
- Área de Ecología, Departamento de Botánica, Ecología y Fisiología Vegetal, Facultad de Ciencias, Córdoba, Spain
| | | | - Teodoro Marañón
- Institute of Natural Resources and Agrobiology of Seville (IRNAS), CSIC, Seville, Spain
| | | | | | - Iván Prieto
- Departamento de Conservación de Suelos y Agua, Centro de Edafología y Biología Aplicada del Segura – Consejo Superior de Investigaciones Científicas (CEBAS-CSIC), Murcia, Spain
- Departamento de Ecología, Facultad de Biología y Ciencias Ambientales, Universidad de León, León, Spain
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10
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Co-inoculation with a dark septate endophyte alters arbuscular mycorrhizal colonization of two widespread plants of the sagebrush steppe. Symbiosis 2021. [DOI: 10.1007/s13199-021-00819-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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11
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Olchowik J, Suchocka M, Jankowski P, Malewski T, Hilszczańska D. The ectomycorrhizal community of urban linden trees in Gdańsk, Poland. PLoS One 2021; 16:e0237551. [PMID: 33901193 PMCID: PMC8075230 DOI: 10.1371/journal.pone.0237551] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 03/22/2021] [Indexed: 12/05/2022] Open
Abstract
The linden tree (Tilia spp.) is a popular tree for landscaping and urban environments in central and northwest European countries, and it is one of the most popular in cities in Poland. Ectomycorrhizal fungi form a symbiosis with many urban tree species and protect the host plant from heavy metals and against salinity. The aim of this study was to characterise the ECM fungal community of urban linden trees along the tree damage gradient. The study was performed on two sites located in the centre of the city of Gdańsk, in northern Poland. The vitality assessment of urban linden trees was made according to Roloff’s classification. Tree damage classes were related to soil characteristics using principal component analysis. The five ectomycorrhizal fungal species were shared among all four tree damage classes, and Cenococcum geophilum was found to be the most abundant and frequent ectomycorrhizal fungal species in each class. Soil samples collected in the vicinity of trees belonging to the R0 class had significantly lower pH Na, Cl and Pb content than other soils. Our knowledge of ectomycorrhizal communities in urban areas is still limited, and these findings provide new insights into ectomycorrhizal distribution patterns in urban areas.
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Affiliation(s)
- Jacek Olchowik
- Department of Plant Protection, Institute of Horticultural Sciences, Warsaw University of Life Sciences, Warsaw, Poland
- * E-mail:
| | - Marzena Suchocka
- Department of Landscape Architecture, Institute of Environmental Engineering, Warsaw University of Life Sciences, Warsaw, Poland
| | - Paweł Jankowski
- Department of Computer Information Systems, Institute of Information Technology, Warsaw University of Life Sciences, Warsaw, Poland
| | - Tadeusz Malewski
- Department of Molecular and Biometric Techniques, Museum and Institute of Zoology, Polish Academy of Science, Warsaw, Poland
| | - Dorota Hilszczańska
- Department of Forest Ecology, Forest Research Institute, Sękocin Stary, Poland
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12
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Qu T, Du X, Peng Y, Guo W, Zhao C, Losapio G. Invasive species allelopathy decreases plant growth and soil microbial activity. PLoS One 2021; 16:e0246685. [PMID: 33561161 PMCID: PMC7872269 DOI: 10.1371/journal.pone.0246685] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 01/23/2021] [Indexed: 11/19/2022] Open
Abstract
According to the 'novel weapons hypothesis', invasive success depends on harmful plant biochemicals, including allelopathic antimicrobial roots exudate that directly inhibit plant growth and soil microbial activity. However, the combination of direct and soil-mediated impacts of invasive plants via allelopathy remains poorly understood. Here, we addressed the allelopathic effects of an invasive plant species (Rhus typhina) on a cultivated plant (Tagetes erecta), soil properties and microbial communities. We grew T. erecta on soil samples at increasing concentrations of R. typhina root extracts and measured both plant growth and soil physiological profile with community-level physiological profiles (CLPP) using Biolog Eco-plates incubation. We found that R. typhina root extracts inhibit both plant growth and soil microbial activity. Plant height, Root length, soil organic carbon (SOC), total nitrogen (TN) and AWCD were significantly decreased with increasing root extract concentration, and plant above-ground biomass (AGB), below-ground biomass (BGB) and total biomass (TB) were significantly decreased at 10 mg·mL-1 of root extracts. In particular, root extracts significantly reduced the carbon source utilization of carbohydrates, carboxylic acids and polymers, but enhanced phenolic acid. Redundancy analysis shows that soil pH, TN, SOC and EC were the major driving factors of soil microbial activity. Our results indicate that strong allelopathic impact of root extracts on plant growth and soil microbial activity by mimicking roots exudate, providing novel insights into the role of plant-soil microbe interactions in mediating invasion success.
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Affiliation(s)
- Tongbao Qu
- College of Horticulture, Jilin Agricultural University, Changchun, PR China
| | - Xue Du
- College of Horticulture, Jilin Agricultural University, Changchun, PR China
| | - Yulan Peng
- College of Horticulture, Jilin Agricultural University, Changchun, PR China
| | - Weiqiang Guo
- College of Horticulture, Jilin Agricultural University, Changchun, PR China
| | - Chunli Zhao
- College of Horticulture, Jilin Agricultural University, Changchun, PR China
| | - Gianalberto Losapio
- Department of Biology, Stanford University, Stanford, CA, United States of America
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13
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Identifying Mechanisms for Successful Ecological Restoration with Salvaged Topsoil in Coastal Sage Scrub Communities. DIVERSITY 2020. [DOI: 10.3390/d12040150] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Although aboveground metrics remain the standard, restoring functional ecosystems should promote both aboveground and belowground biotic communities. Restoration using salvaged soil—removal and translocation of topsoil from areas planned for development, with subsequent deposition at degraded sites—is an alternative to traditional methods. Salvaged soil contains both seed and spore banks, which may holistically augment restoration. Salvaged soil methods may reduce non-native germination by burying non-native seeds, increase native diversity by adding native seeds, or transfer soil microbiomes, including arbuscular mycorrhizal fungi (AMF), to recipient sites. We transferred soil to three degraded recipient sites and monitored soil microbes, using flow cytometry and molecular analyses, and characterized the plant community composition. Our findings suggest that salvaged soil at depths ≥5 cm reduced non-native grass cover and increased native plant density and species richness. Bacterial abundance at recipient sites were statistically equivalent to donor sites in abundance. Overall, topsoil additions affected AMF alpha diversity and community composition and increased rhizophilic AMF richness. Because salvaged soil restoration combines multiple soil components, including native plant and microbial propagules, it may promote both aboveground and belowground qualities of the donor site, when applying this method for restoring invaded and degraded ecosystems.
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15
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Kim CS, Jo JW, Lee H, Kwag YN, Cho SE, Oh SH. Comparison of Soil Higher Fungal Communities between Dead and Living Abies koreana in Mt. Halla, the Republic of Korea. MYCOBIOLOGY 2020; 48:364-372. [PMID: 36860556 PMCID: PMC9969794 DOI: 10.1080/12298093.2020.1811193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
To improve our understanding of the relationship between soil higher fungi (belonging to Ascomycota and Basidiomycota) and Abies koreana, we surveyed A. koreana soil fungal communities in a forest in Mt. Halla, Jeju Island, Korea by next-generation sequencing (Illumina Miseq). To confirm the soil higher fungal communities, we collected two types of soils from a defined plot: soils with dead (AKDTs) and living A. koreana (AKLTs), respectively. Soil fungi were classified into 2 phyla, 19 classes, 64 orders, 133 families, 195 genera, and 229 OTUs (895,705 sequence reads). Nonmetric multidimensional scaling (NMDS) showed significantly different soil higher fungal communities between AKDTs and AKLTs (p < .05). In addition, the saprophyte composition was significantly affected by A. koreana status (p < .05). The proportion of the mycorrhizal Clavulina spp. was different between soils with AKDTs and AKLTs, suggesting that Clavulina spp. may be a crucial soil fungal species influencing A. koreana. This study will lead to a better understanding of the ecological status of A. koreana in Mt. Halla. In addition, this study could be useful for the conservation and management of A. koreana habitats.
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Affiliation(s)
- Chang Sun Kim
- Forest Biodiversity Division, Korea National
Arboretum, Pocheon, Korea
- CONTACT Chang Sun Kim
| | - Jong Won Jo
- Forest Biodiversity Division, Korea National
Arboretum, Pocheon, Korea
| | - Hyen Lee
- Forest Biodiversity Division, Korea National
Arboretum, Pocheon, Korea
| | - Young-Nam Kwag
- Forest Biodiversity Division, Korea National
Arboretum, Pocheon, Korea
| | - Sung Eun Cho
- Forest Biodiversity Division, Korea National
Arboretum, Pocheon, Korea
| | - Seung Hwan Oh
- Forest Biodiversity Division, Korea National
Arboretum, Pocheon, Korea
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16
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Cruz-Paredes C, Frøslev TG, Michelsen A, Bang-Andreasen T, Hansen M, Ingerslev M, Skov S, Wallander H, Kjøller R. Wood ash application in a managed Norway spruce plantation did not affect ectomycorrhizal diversity or N retention capacity. FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2018.11.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Trinchera A, Ciaccia C, Testani E, Baratella V, Campanelli G, Leteo F, Canali S. Mycorrhiza-mediated interference between cover crop and weed in organic winter cereal agroecosystems: The mycorrhizal colonization intensity indicator. Ecol Evol 2019; 9:5593-5604. [PMID: 31160984 PMCID: PMC6540714 DOI: 10.1002/ece3.5125] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 02/01/2019] [Accepted: 02/08/2019] [Indexed: 11/16/2022] Open
Abstract
The mycorrhizal fungi are symbiotic organisms able to provide many benefits to crop production by supplying a set of ecosystem functions. A recent ecological approach based on the ability of the fungi community to influence plant-plant interactions by extraradical mycelium development may be applied to diversified, herbaceous agroecosystems. Our hypothesis is that the introduction of a winter cereal cover crop (CC) as arbuscular mycorrhizal fungi (AMF)-host plant in an organic rotation can boosts the AMF colonization of the other plants, influencing crop-weed interference. In a 4-years organic rotation, the effect of two winter cereal CC, rye and spelt, on weed density and AMF colonization was evaluated. The AMF extraradical mycelium on CC and weeds roots was observed by scanning electron microscopy analysis. By joining data of plant density and mycorrhization, we built the mycorrhizal colonization intensity of the Agroecosystem indicator (MA%). Both the CC were colonized by soil AMF, being the mycorrhizal colonization intensity (M%) affected by environmental conditions. Under CC, the weed density was reduced, due to the increase of the reciprocal competition in favor of CC, which benefited from mycorrhizal colonization and promoted the development of AMF extraradical mycelium. Even though non-host plants, some weed species showed an increased mycorrhizal colonization in presence of CC respect to the control. Under intense rainfall, the MA% was less sensitive to the CC introduction. On the opposite, under highly competitive conditions, both the CC boosted significantly the mycorrhization of coexistent plants in the agroecosystem. The proposed indicator measured the agroecological service provided by the considered CCs in promoting or inhibiting the overall AMF colonization of the studied agroecosystems, as affected by weed selection and growth: It informs about agroecosystem resilience and may be profitably applied to indicate the extent of the linkage of specific crop traits to agroecosystem services, contributing to further develop the functional biodiversity theory.
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Affiliation(s)
- Alessandra Trinchera
- CREA Research Centre for Agriculture and EnvironmentCouncil for Agricultural Research and EconomicsRomeItaly
| | - Corrado Ciaccia
- CREA Research Centre for Agriculture and EnvironmentCouncil for Agricultural Research and EconomicsRomeItaly
| | - Elena Testani
- CREA Research Centre for Agriculture and EnvironmentCouncil for Agricultural Research and EconomicsRomeItaly
| | - Valentina Baratella
- CREA Research Centre for Agriculture and EnvironmentCouncil for Agricultural Research and EconomicsRomeItaly
| | - Gabriele Campanelli
- CREA Research Centre for Vegetable and Ornamental CropsCouncil for Agricultural Research and EconomicsMonsampolo del Tronto (AP)Italy
| | - Fabrizio Leteo
- CREA Research Centre for Vegetable and Ornamental CropsCouncil for Agricultural Research and EconomicsMonsampolo del Tronto (AP)Italy
| | - Stefano Canali
- CREA Research Centre for Agriculture and EnvironmentCouncil for Agricultural Research and EconomicsRomeItaly
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18
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Vieira LC, da Silva DKA, da Silva IR, Gonçalves CM, de Assis DMA, Oehl F, da Silva GA. Ecological aspects of arbuscular mycorrhizal fungal communities in different habitat types of a Brazilian mountainous area. Ecol Res 2019. [DOI: 10.1111/1440-1703.1061] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Larissa C. Vieira
- Departamento de Micologia, Laboratório de Micorrizas Universidade Federal de Pernambuco Recife Pernambuco Brazil
| | - Danielle K. A. da Silva
- Campus de Ciências Agrárias, Laboratório de Microbiologia, Universidade Federal do Vale do São Francisco Petrolina Brazil
| | - Iolanda R. da Silva
- Departamento de Micologia, Laboratório de Micorrizas Universidade Federal de Pernambuco Recife Pernambuco Brazil
| | - Camila M. Gonçalves
- Departamento de Micologia, Laboratório de Micorrizas Universidade Federal de Pernambuco Recife Pernambuco Brazil
| | - Daniele M. A. de Assis
- Departamento de Micologia, Laboratório de Micorrizas Universidade Federal de Pernambuco Recife Pernambuco Brazil
| | - Fritz Oehl
- Agroscope, Competence Division for Plants and Plant Products, Ecotoxicology Wädenswil Switzerland
| | - Gladstone A. da Silva
- Departamento de Micologia, Laboratório de Micorrizas Universidade Federal de Pernambuco Recife Pernambuco Brazil
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Taniguchi T, Kitajima K, Douhan GW, Yamanaka N, Allen MF. A pulse of summer precipitation after the dry season triggers changes in ectomycorrhizal formation, diversity, and community composition in a Mediterranean forest in California, USA. MYCORRHIZA 2018; 28:665-677. [PMID: 30105498 PMCID: PMC6182365 DOI: 10.1007/s00572-018-0859-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 08/02/2018] [Indexed: 06/08/2023]
Abstract
Rapid responses of microbial biomass and community composition following a precipitation event have been reported for soil bacteria and fungi, but measurements characterizing ectomycorrhizal fungi remain limited. The response of ectomycorrhizal fungi after a precipitation event is crucial to understanding biogeochemical cycles and plant nutrition. Here, we examined changes in ectomycorrhizal formation, diversity, and community composition at the end of a summer drought and following precipitation events in a conifer-oak mixed forest under a semiarid, Mediterranean-type climate in CA, USA. To study the effects of different amounts of precipitation, a water addition treatment was also undertaken. Ectomycorrhizal fungal diversity and community composition changed within 6 days following precipitation, with increased simultaneous mortality and re-growth. Ectomycorrhizal diversity increased and community composition changed both in the natural rainfall (less than 10 mm) and water addition (50 mm) treatments, but larger decreases in ectomycorrhizal diversity were observed from 9 to 16 days after precipitation in the water addition treatment. The changes were primarily a shift in richness and abundance of Basidiomycota species, indicating higher drought sensitivity of Basidiomycota species compared with Ascomycota species. Our results indicate that ectomycorrhizal formation, diversity, and community composition rapidly respond to both precipitation events and to the amount of precipitation. These changes affect ecosystem functions, such as nutrient cycling, decomposition, and plant nutrient uptake, in semiarid regions.
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Affiliation(s)
- Takeshi Taniguchi
- Center for Conservation Biology, University of California, Riverside, CA, 92521, USA.
- Arid Land Research Center, Tottori University, Tottori, 680-0001, Japan.
| | - Kuni Kitajima
- Center for Conservation Biology, University of California, Riverside, CA, 92521, USA
| | - Greg W Douhan
- Department of Plant Pathology and Microbiology, University of California, Riverside, CA, 92521, USA
- University of California Cooperative Extension, 4437-B S. Laspina St., Tulare, CA, 93274, USA
| | - Norikazu Yamanaka
- Arid Land Research Center, Tottori University, Tottori, 680-0001, Japan
| | - Michael F Allen
- Center for Conservation Biology, University of California, Riverside, CA, 92521, USA
- Department of Plant Pathology and Microbiology, University of California, Riverside, CA, 92521, USA
- Department of Biology, University of California, Riverside, CA, 92521, USA
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20
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Li Q, Yan L, Ye L, Zhou J, Zhang B, Peng W, Zhang X, Li X. Chinese Black Truffle ( Tuber indicum) Alters the Ectomycorrhizosphere and Endoectomycosphere Microbiome and Metabolic Profiles of the Host Tree Quercus aliena. Front Microbiol 2018; 9:2202. [PMID: 30283422 PMCID: PMC6156548 DOI: 10.3389/fmicb.2018.02202] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 08/28/2018] [Indexed: 01/06/2023] Open
Abstract
Truffles are one group of the most famous ectomycorrhizal fungi in the world. There is little information on the ecological mechanisms of truffle ectomycorrhizal synthesis in vitro. In this study, we investigated the ecological effects of Tuber indicum – Quercus aliena ectomycorrhizal synthesis on microbial communities in the host plant roots and the surrounding soil using high-throughput sequencing and on the metabolic profiles of host plant roots using metabolomics approaches. We observed an increase in the diversity and richness of prokaryotic communities and a decrease in richness of fungal communities in the presence of T. indicum. The microbial community structures in the host roots and the surrounding soil were altered by ectomycorrhizal synthesis in the greenhouse. Bacterial genera Pedomicrobium, Variibacter, and Woodsholea and fungal genera Aspergillus, Phaeoacremonium, and Pochonia were significantly more abundant in ectomycorhizae and the ectomycorrhizosphere soil compared with the corresponding T. indicum-free controls (P < 0.05). Truffle-colonization reduced the abundance of some fungal genera surrounding the host tree, such as Acremonium, Aspergillus, and Penicillium. Putative prokaryotic metabolic functions and fungal functional groups (guilds) were also differentiated by ectomycorrhizal synthesis. The ectomycorrhizal synthesis had great impact on the measured soil physicochemical properties. Metabolic profiling analysis uncovered 55 named differentially abundant metabolites between the ectomycorhizae and the control roots, including 44 upregulated and 11 downregulated metabolites. Organic acids and carbohydrates were two major upregulated metabolites in ectomycorhizae, which were found formed dense interactions with other metabolites, suggesting their crucial roles in sustaining the metabolic functions in the truffle ectomycorrhization system. This study revealed the effects of truffle-colonization on the metabolites of ectomycorrhiza and illustrates an interactive network between truffles, the host plant, soil and associated microbial communities, shedding light on understanding the ecological effects of truffles.
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Affiliation(s)
- Qiang Li
- Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, China.,Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Lijuan Yan
- Aquatic Geomicrobiology, Institute of Biodiversity, Friedrich Schiller University Jena, Jena, Germany
| | - Lei Ye
- Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, China
| | - Jie Zhou
- Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, China
| | - Bo Zhang
- Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, China
| | - Weihong Peng
- Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, China
| | - Xiaoping Zhang
- Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, China
| | - Xiaolin Li
- Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu, China
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Nadeau MB, Laur J, Khasa DP. Mycorrhizae and Rhizobacteria on Precambrian Rocky Gold Mine Tailings: I. Mine-Adapted Symbionts Promote White Spruce Health and Growth. FRONTIERS IN PLANT SCIENCE 2018; 9:1267. [PMID: 30233614 PMCID: PMC6130231 DOI: 10.3389/fpls.2018.01267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 08/10/2018] [Indexed: 06/08/2023]
Abstract
White spruce [Picea glauca (Moench) Voss] is a commercially valuable boreal tree that has been known for its ability to colonize deglaciated rock tailings. Over the last decade, there has been an increasing interest in using this species for the revegetation and successful restoration of abandoned mine spoils. Herein, we conducted a glasshouse experiment to screen mycorrhizal fungi and rhizobacteria capable of improving the health and growth of white spruce seedlings growing directly on waste rocks (WRs) or fine tailings (FTs) from the Sigma-Lamaque gold mine located in the Canadian Abitibi region. After 32 weeks, measurements of health, growth, and mycorrhizal colonization variables of seedlings were performed. Overall, symbionts isolated from roots of healthy white spruce seedlings growing on the mining site, especially Cadophora finlandia Cad. fin. MBN0213 GenBank No. KC840625 and Pseudomonas putida MBN0213 GenBank No. AY391278, were more efficient in enhancing seedling health and growth than allochthonous species and constitute promising microbial symbionts. In general, mycorrhizae promoted plant health and belowground development, while rhizobacteria enhanced aboveground plant biomass. The observed beneficial effects were substrate-, strain-, and/or strains combination-specific. Therefore, preliminary experiments in control conditions such as the one described here can be part of an efficient and integrated strategy to select ecologically well-adapted symbiotic microorganisms, critical for the success of a long-term revegetation program.
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Affiliation(s)
| | - Joan Laur
- Institut de Recherche en Biologie Végétale, Université de Montréal, Montreal, QC, Canada
| | - Damase P. Khasa
- Centre for Forest Research and Institute of Integrative and Systems Biology, Université Laval, Quebec City, QC, Canada
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22
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Nadeau MB, Laur J, Khasa DP. Mycorrhizae and Rhizobacteria on Precambrian Rocky Gold Mine Tailings: II. Mine-Adapted Symbionts Alleviate Soil Element Imbalance for a Better Nutritional Status of White Spruce Seedlings. FRONTIERS IN PLANT SCIENCE 2018; 9:1268. [PMID: 30233615 PMCID: PMC6130232 DOI: 10.3389/fpls.2018.01268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 08/10/2018] [Indexed: 06/08/2023]
Abstract
In the context of a phytorestoration project, the purpose of this study was to assess the respective contribution to the nutritional status of Picea glauca seedlings of ectomycorrhizae and rhizobacteria native or not to the Sigma-Lamaque gold mine wastes in northern Quebec, Canada. In a glasshouse experiment, inoculated plants were grown for 32 weeks on coarse waste rocks or fine tailings obtained from the mining site. The survival, health, growth, and nutritional status of plants were better on coarse waste rocks than on fine tailings. Fe and Ca were especially found at high levels in plant tissues but at much lower concentrations on waste rocks. Interestingly, inoculation of microsymbionts had only minimal effects on N, P, K, and Mg plant status that were indeed close or within the concentration range encountered in healthy seedlings. However, both fungal and bacterial treatments improved Fe and Ca concentrations in plant tissues. Fe concentration in the foliage of plants inoculated with the fungi Tricholoma scalpturatum Tri. scalp. MBN0213 GenBank #KC840613 and Cadophora finlandia Cad. fin. MBN0213 GenBank #KC840625 was reduced by >50%. Both fungi were isolated from the mining site. The rhizobacteria, Azotobacter chroococcum, also improved plant Fe level in some cases. Regarding Ca nutritional status, the native bacterial strain Pseudomonas putida MBN0213 GenBank #AY391278 was the only symbiont that reduced foliar content by up to 23%. Ca concentration was negatively correlated with the fungal mycorrhization rate of seedling roots. This relation was especially strong (r = -0.66, p-value ≤ 0.0001) in the case of C. finlandia. Also, a similar relationship existed with root Fe concentration (r = -0.44, p-value ≤ 0.0001). In fact, results showed that seedling performance was more correlated with elevated Ca and Fe concentration in planta than with nutrient deficiency. Also, native microsymbionts were capable of regulating seedling nutrition in the poor substrate of the Sigma-Lamaque gold mine tailings.
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Affiliation(s)
| | - Joan Laur
- Institut de Recherche en Biologie Végétale, Université de Montréal, Montréal, QC, Canada
| | - Damase P. Khasa
- Centre for Forest Research and Institute of Integrative and Systems Biology, Université Laval, Quebec City, QC, Canada
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Worrich A, Wick LY, Banitz T. Ecology of Contaminant Biotransformation in the Mycosphere: Role of Transport Processes. ADVANCES IN APPLIED MICROBIOLOGY 2018; 104:93-133. [PMID: 30143253 DOI: 10.1016/bs.aambs.2018.05.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fungi and bacteria often share common microhabitats. Their co-occurrence and coevolution give rise to manifold ecological interactions in the mycosphere, here defined as the microhabitats surrounding and affected by hyphae and mycelia. The extensive structure of mycelia provides ideal "logistic networks" for transport of bacteria and matter in structurally and chemically heterogeneous soil ecosystems. We describe the characteristics of the mycosphere as a unique and highly dynamic bacterial habitat and a hot spot for contaminant biotransformation. In particular, we emphasize the role of the mycosphere for (i) bacterial dispersal and colonization of subsurface interfaces and new habitats, (ii) matter transport processes and contaminant bioaccessibility, and (iii) the functional stability of microbial ecosystems when exposed to environmental fluctuations such as stress or disturbances. Adopting concepts from ecological theory, the chapter disentangles bacterial-fungal impacts on contaminant biotransformation in a systemic approach that interlinks empirical data from microbial ecosystems with simulation data from computational models. This approach provides generic information on key factors, processes, and ecological principles that drive microbial contaminant biotransformation in soil. We highlight that the transport processes create favorable habitat conditions for efficient bacterial contaminant degradation in the mycosphere. In-depth observation, understanding, and prediction of the role of mycosphere transport processes will support the use of bacterial-fungal interactions in nature-based solutions for contaminant biotransformation in natural and man-made ecosystems, respectively.
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Affiliation(s)
- Anja Worrich
- Department of Environmental Microbiology, UFZ-Helmholtz Centre for Environmental Research, Leipzig, Germany
| | - Lukas Y Wick
- Department of Environmental Microbiology, UFZ-Helmholtz Centre for Environmental Research, Leipzig, Germany.
| | - Thomas Banitz
- Department of Ecological Modelling, UFZ-Helmholtz Centre for Environmental Research, Leipzig, Germany
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24
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Wu Q, Tang Y, Dong T, Liao Y, Li D, He X, Xu X. Additional AM Fungi Inoculation Increase Populus cathayana Intersexual Competition. FRONTIERS IN PLANT SCIENCE 2018; 9:607. [PMID: 29868065 PMCID: PMC5951968 DOI: 10.3389/fpls.2018.00607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Accepted: 04/17/2018] [Indexed: 05/14/2023]
Abstract
Sex-specific responses to mycorrhiza have been reported in dioecious plant species, but little attention has been paid to the influence of arbuscular mycorrhizal (AM) fungi on competitive ability under intersexual competition. To further address whether this competition is affected by an additional AM fungi supply, Populus cathayana saplings were chosen and subjected to two mycorrhizal treatments [inoculated and non-inoculated (control) with an additional AM fungi Funneliformis mosseae] while growing with the opposite sex for 3 months. Compared with the control, the additional AM fungi inoculation induced P. cathayana saplings to exhibit significant sexual differences in root structure and nutrient uptake (e.g., cortical layer, cross-section area, radius of root tips, and N, K, and Mg content), and enlarged sexual differences in morphology and biomass accumulation (e.g., leaf number increment, shoot height increment, total leaf area, total specific root length, stem dry mass, leaf dry mass, and total dry mass). Meanwhile, inoculated females presented higher values in most of these traits mentioned above than males under intersexual competition. Therefore, we conclude that the intersexual competition can be increased by an additional AM fungi supply, with females gaining more symbiosis-mediated benefits than males.
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Affiliation(s)
- Qiuping Wu
- Key Laboratory of Southwest China Wildlife Resources Conservation, China West Normal University, Nanchong, China
| | - Yun Tang
- Key Laboratory of Southwest China Wildlife Resources Conservation, China West Normal University, Nanchong, China
| | - Tingfa Dong
- Key Laboratory of Southwest China Wildlife Resources Conservation, China West Normal University, Nanchong, China
- Institute of Plant Adaptation and Utilization in Southwest Mountain, China West Normal University, Nanchong, China
| | - Yongmei Liao
- Key Laboratory of Southwest China Wildlife Resources Conservation, China West Normal University, Nanchong, China
| | - Dadong Li
- Key Laboratory of Southwest China Wildlife Resources Conservation, China West Normal University, Nanchong, China
| | - Xinhua He
- Centre of Excellence for Soil Biology, College of Resources and Environment, Southwest University, Beibei, China
| | - Xiao Xu
- Key Laboratory of Southwest China Wildlife Resources Conservation, China West Normal University, Nanchong, China
- College of Grassland, Resources, and Environment, Inner Mongolia Agricultural University, Hohhot, China
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León-Sánchez L, Nicolás E, Goberna M, Prieto I, Maestre FT, Querejeta JI. Poor plant performance under simulated climate change is linked to mycorrhizal responses in a semiarid shrubland. THE JOURNAL OF ECOLOGY 2018; 106:960-976. [PMID: 30078910 PMCID: PMC6071827 DOI: 10.1111/1365-2745.12888] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Warmer and drier conditions associated with ongoing climate change will increase abiotic stress for plants and mycorrhizal fungi in drylands worldwide, thereby potentially reducing vegetation cover and productivity and increasing the risk of land degradation and desertification. Rhizosphere microbial interactions and feedbacks are critical processes that could either mitigate or aggravate the vulnerability of dryland vegetation to forecasted climate change.We conducted a four-year manipulative study in a semiarid shrubland in the Iberian Peninsula to assess the effects of warming (~2.5ºC; W), rainfall reduction (~30%; RR) and their combination (W+RR) on the performance of native shrubs (Helianthemum squamatum) and their associated mycorrhizal fungi.Warming (W and W+RR) decreased the net photosynthetic rates of H. squamatum shrubs by ~31% despite concurrent increases in stomatal conductance (~33%), leading to sharp decreases (~50%) in water use efficiency. Warming also advanced growth phenology, decreased leaf nitrogen and phosphorus contents per unit area, reduced shoot biomass production by ~36% and decreased survival during a dry year in both W and W+RR plants. Plants under RR showed more moderate decreases (~10-20%) in photosynthesis, stomatal conductance and shoot growth.Warming, RR and W+RR altered ectomycorrhizal fungal (EMF) community structure and drastically reduced the relative abundance of EMF sequences obtained by high-throughput sequencing, a response associated with decreases in the leaf nitrogen, phosphorus and dry matter contents of their host plants. In contrast to EMF, the community structure and relative sequence abundances of other non-mycorrhizal fungal guilds were not significantly affected by the climate manipulation treatments.Synthesis: Our findings highlight the vulnerability of both native plants and their symbiotic mycorrhizal fungi to climate warming and drying in semiarid shrublands, and point to the importance of a deeper understanding of plant-soil feedbacks to predict dryland vegetation responses to forecasted aridification. The interdependent responses of plants and ectomycorrhizal fungi to warming and rainfall reduction may lead to a detrimental feedback loop on vegetation productivity and nutrient pool size, which could amplify the adverse impacts of forecasted climate change on ecosystem functioning in EMF-dominated drylands.
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Affiliation(s)
- Lupe León-Sánchez
- Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Murcia, Spain
| | - Emilio Nicolás
- Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Murcia, Spain
| | - Marta Goberna
- Centro de Investigaciones sobre Desertificación (CIDE-CSIC, UVEG, GV), Moncada, Valencia, Spain
| | - Iván Prieto
- Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), Murcia, Spain
| | - Fernando T. Maestre
- Departamento de Biología y Geología, Física y Química Inorgánica, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, Móstoles, Spain
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Tsvetkov I, Atanassov A, Vlahova M, Carlier L, Christov N, Lefort F, Rusanov K, Badjakov I, Dincheva I, Tchamitchian M, Rakleova G, Georgieva L, Tamm L, Iantcheva A, Herforth-Rahmé J, Paplomatas E, Atanassov I. Plant organic farming research – current status and opportunities for future development. BIOTECHNOL BIOTEC EQ 2018. [DOI: 10.1080/13102818.2018.1427509] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- Ivan Tsvetkov
- AgroBioInstitute, Agricultural Academy, Sofia, Bulgaria
| | - Atanas Atanassov
- Joint Genomic Center, Sofia University ‘St. Kliment Ohridski’, Sofia, Bulgaria
| | - Mariana Vlahova
- Joint Genomic Center, Sofia University ‘St. Kliment Ohridski’, Sofia, Bulgaria
| | - Lucien Carlier
- Plant Sciences Department, Institute for Agricultural and Fisheries Research, Merelbeke, Belgium
| | | | - Francois Lefort
- University of Applied Sciences and Arts Western Switzerland, Delemont, Switzerland
| | | | | | | | - Mark Tchamitchian
- INRA French National Institute for Agricultural Research, Avignon, France
| | - Goritsa Rakleova
- Joint Genomic Center, Sofia University ‘St. Kliment Ohridski’, Sofia, Bulgaria
| | | | - Lucius Tamm
- FiBL Forschungsinstitut für biologischen Landbau, Frick, Switzerland
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27
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Curd EE, Martiny JBH, Li H, Smith TB. Bacterial diversity is positively correlated with soil heterogeneity. Ecosphere 2018. [DOI: 10.1002/ecs2.2079] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Emily E. Curd
- Department of Ecology and Evolutionary Biology University of California Los Angeles 612 Charles E. Young Drive South, Box 957246 Los Angeles California 90095 USA
| | - Jennifer B. H. Martiny
- Department of Ecology and Evolutionary Biology University of California Irvine 321 Steinhaus Hall Irvine California 92697 USA
| | - Huiying Li
- Department of Molecular and Medical Pharmacology Crump Institute for Molecular Imaging David Geffen School of Medicine University of California Los Angeles 650 Charles E. Young Drive South Los Angeles California 90095 USA
- DOE Institute University of California Los Angeles 611 Charles E. Young Drive East Los Angeles California 90095 USA
| | - Thomas B. Smith
- Department of Ecology and Evolutionary Biology University of California Los Angeles 612 Charles E. Young Drive South, Box 957246 Los Angeles California 90095 USA
- Center for Tropical Research University of California Los Angeles LaKretz Hall, 619 Charles E. Young Drive East, #300 Los Angeles California 90095 USA
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Koyama A, Pietrangelo O, Sanderson L, Antunes PM. An empirical investigation of the possibility of adaptability of arbuscular mycorrhizal fungi to new hosts. MYCORRHIZA 2017; 27:553-563. [PMID: 28536847 DOI: 10.1007/s00572-017-0776-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 05/08/2017] [Indexed: 06/07/2023]
Abstract
Little is known about the adaptive capacity of arbuscular mycorrhizal (AM) fungi to novel hosts. Here we assessed the possibility of two heterospecific AM fungal isolates to adaptively change, in terms of host biomass response, as a function of host plant identity, over the course of a growing season. First, we produced pure inocula of Rhizophagus clarus and Rhizophagus intraradices, each starting from a single spore. Second, we "trained" each isolate individually in a community with two plants, sudangrass (Sorgum bicolour subsp. drummondii) and leek (Aliium ampeloprasum var. porrum), using a dual-compartment system to allow the establishment of a common mycorrhizal network between the two hosts. Third, we conducted a greenhouse experiment to reciprocally test each "trained" clone, obtained from each compartment, either with the same (home), or the other host (away) under two contrasting phosphorus levels. Overall, results did not support adaptive responses of the AM fungi to their hosts (i.e., greater host biomass under "home" relative to "away" conditions), but the opposite (i.e., greater host biomass under "away" relative to "home" conditions) was more frequently observed. These changes in AM fungal symbiotic functioning open the possibility for relatively rapid genetic change of arbuscular mycorrhizal fungi in response to new hosts, which represents one step forward from in vitro experiments.
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Affiliation(s)
- Akihiro Koyama
- Department of Biology, Algoma University, Queen Street East, Sault Ste. Marie, Ontario, P6A 2G4, Canada
| | - Olivia Pietrangelo
- Department of Biology, Algoma University, Queen Street East, Sault Ste. Marie, Ontario, P6A 2G4, Canada
| | - Laura Sanderson
- Department of Biology, Algoma University, Queen Street East, Sault Ste. Marie, Ontario, P6A 2G4, Canada
| | - Pedro M Antunes
- Department of Biology, Algoma University, Queen Street East, Sault Ste. Marie, Ontario, P6A 2G4, Canada.
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He Y, Cornelissen JHC, Zhong Z, Dong M, Jiang C. How interacting fungal species and mineral nitrogen inputs affect transfer of nitrogen from litter via arbuscular mycorrhizal mycelium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:9791-9801. [PMID: 28258426 DOI: 10.1007/s11356-017-8649-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 02/16/2017] [Indexed: 06/06/2023]
Abstract
In the karst landscape, widespread in the world including southern China, soil nutrient supply is strongly constrained. In such environments, arbuscular mycorrhizal (AM) fungi may facilitate plant nutrient uptake. However, the possible role of different AM fungal species, and their interactions, especially in transferring nitrogen (N) from litter to plant, is poorly understood. We conducted two microcosm experiments to investigate the role that two karst soil AM fungi, Glomus etunicatum and Glomus mosseae, play in the transfer of N from decomposing litter to the host plant and to determine how N availability influences these processes. In experiment 1, Cinnamomum camphora tree seedlings were grown in compartments inoculated with G. etunicatum. Lolium perenne leaf litter labeled with δ15N was added to the soil in unplanted compartments. Compartments containing the δ15N labeled litter were either accessible to hyphae but not to seedling roots or were not accessible to hyphae or roots. The addition of mineral N to one of the host compartments at the start of the experiment significantly increased the biomass of the C. camphora seedlings, N content and N:P ratio, AM mycelium length, and soil microbial biomass carbon and N. However, significantly, more δ15N was acquired, from the leaf litter by the AM hyphae and transferred to the host when mineral N was not added to the soil. In experiment 2, in which C. camphora seedlings were inoculated with both G. etunicatum and G. mosseae rather than with G. mosseae alone, there was a significant increase in mycelial growth (50.21%), in soil microbial biomass carbon (417.73%) in the rhizosphere, and in the amount of δ15N that was transferred to the host. These findings suggest that maintaining AM fungal diversity in karst soils could be important for mediating N transfer from organic material to host plants in N-poor soils.
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Affiliation(s)
- Yuejun He
- Forestry College, Research Center of Forest Resources and Environment of Guizhou Province, Guizhou University, Huaxi, Guiyang, People's Republic of China.
- Laboratory of Quantitative Vegetation Ecology, Institute of Botany, The Chinese Academy of Sciences, Xiangshan Nanxincun, Beijing, People's Republic of China.
| | - J Hans C Cornelissen
- Systems Ecology Department of Ecological Science, Faculty of Earth and Life Sciences, VU University (Vrije Universiteit) Amsterdam, De Boelelaan 1085, Amsterdam, HV, 1081, The Netherlands
| | - Zhangcheng Zhong
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education)/Life Science College, Southwest University, Beibei, Chongqing, People's Republic of China.
| | - Ming Dong
- Laboratory of Quantitative Vegetation Ecology, Institute of Botany, The Chinese Academy of Sciences, Xiangshan Nanxincun, Beijing, People's Republic of China
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Changhong Jiang
- Forestry College, Research Center of Forest Resources and Environment of Guizhou Province, Guizhou University, Huaxi, Guiyang, People's Republic of China
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Radwanski D, Gallagher F, Vanderklein DW, Schäfer KVR. Photosynthesis and aboveground carbon allocation of two co-occurring poplar species in an urban brownfield. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 223:497-506. [PMID: 28139323 DOI: 10.1016/j.envpol.2017.01.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 01/17/2017] [Accepted: 01/17/2017] [Indexed: 06/06/2023]
Abstract
Phytoremediation, a technique used to reclaim heavy metal-contaminated soils, requires an understanding of plant physiological responses to heavy metals. However, the majority of studies documenting heavy metal impact on plant functioning have been performed in laboratory or greenhouse settings. We predicted that increased soil heavy metal concentrations reduce photosynthesis and biomass production in trees growing in metal contaminated soil in a naturally re-vegetated urban brownfield. Leaf gas exchange, leaf carbon and nitrogen concentration, and tree biomass were recorded and compared for Populus deltoides and Populus tremuloides growing in an urban brownfield. The CO2 compensation point (CCP) differed significantly between soil metal concentrations and species, with P. deltoides displaying a greater CCP and P. tremuloides displaying a lower CCP as soil metal concentration increased, despite no changes in dark respiration for either species. In terms of biomass, only total branch weight (TBW) and leaf area (LA) differed significantly between soil metal concentrations, though the difference was largely attributable to variation in diameter at breast height (DBH). Furthermore, TBW and LA values for P. deltoides did not decrease with increasing soil metal concentration. Soil metal concentration, thus, had minimal effect on the relationship between tree age and DBH, and no effect on relationships of tree age and height or LA, respectively. Significant differences between soil metal concentrations and species were found for δ15N (isotopic nitrogen ratio) while leaf nitrogen content (% N) also differed significantly between species. Long-term water use efficiency derived from carbon isotope analysis (iWUEisotope) differed significantly between trees grown on different soil metal concentrations and a significant species-metal concentration interaction was detected indicating that the two study species responded differentially to the soil metal concentrations. Specifically, P. tremuloides enhanced while P. deltoides reduced long-term iWUEisotope as soil metal concentration increased, further emphasizing the importance of species and possible genotype selection for phytoremediation.
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Affiliation(s)
- Diane Radwanski
- Department of Biological Sciences, Rutgers University, Newark, NJ, United States
| | - Frank Gallagher
- Department of Landscape Architecture, Rutgers University, New Brunswick, NJ, United States
| | - Dirk W Vanderklein
- Department of Biology, Montclair State University, Montclair, NJ, United States
| | - Karina V R Schäfer
- Department of Biological Sciences, Rutgers University, Newark, NJ, United States; Earth and Environmental Science Department, Rutgers University, Newark, NJ, United States.
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31
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Casazza G, Lumini E, Ercole E, Dovana F, Guerrina M, Arnulfo A, Minuto L, Fusconi A, Mucciarelli M. The abundance and diversity of arbuscular mycorrhizal fungi are linked to the soil chemistry of screes and to slope in the Alpic paleo-endemic Berardia subacaulis. PLoS One 2017; 12:e0171866. [PMID: 28192471 PMCID: PMC5305098 DOI: 10.1371/journal.pone.0171866] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 01/26/2017] [Indexed: 01/12/2023] Open
Abstract
Berardia subacaulis Vill. is a monospecific genus that is endemic to the South-western Alps, where it grows on alpine screes, which are extreme habitats characterized by soil disturbance and limiting growth conditions. Root colonization by arbuscular mycorrhizal fungi (AMF) is presumably of great importance in these environments, because of its positive effect on plant nutrition and stress tolerance, as well as on structuring the soil. However, there is currently a lack of information on this topic. In this paper, we tested which soil characteristics and biotic factors could contribute to determining the abundance and community composition of AMF in the roots of B. subacaulis, which had previously been found to be mycorrhizal. For such a reason, the influence of soil properties and environmental factors on AMF abundance and community composition in the roots of B. subacaulis, sampled on three different scree slopes, were analysed through microscopic and molecular analysis. The results have shown that the AMF community of Berardia roots was dominated by Glomeraceae, and included a core of AMF taxa, common to all three scree slopes. The vegetation coverage and dark septate endophytes were not related to the AMF colonization percentage and plant community did not influence the root AMF composition. The abundance of AMF in the roots was related to some chemical (available extractable calcium and potassium) and physical (cation exchange capacity, electrical conductivity and field capacity) properties of the soil, thus suggesting an effect of AMF on improving the soil quality. The non-metric multidimensional scaling (NMDS) ordination of the AMF community composition showed that the diversity of AMF in the various sites was influenced not only by the soil quality, but also by the slope. Therefore, the slope-induced physical disturbance of alpine screes may contribute to the selection of disturbance-tolerant AMF taxa, which in turn may lead to different plant-fungus assemblages.
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Affiliation(s)
| | - Erica Lumini
- Istituto per la Protezione Sostenibile delle Piante–CNR, Viale P.A. Mattioli 25, TORINO, Italy
| | - Enrico Ercole
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
| | - Francesco Dovana
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
| | - Maria Guerrina
- Università di Genova, DISTAV, Corso Europa 26, GENOVA, Italy
| | - Annamaria Arnulfo
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
| | - Luigi Minuto
- Università di Genova, DISTAV, Corso Europa 26, GENOVA, Italy
| | - Anna Fusconi
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
| | - Marco Mucciarelli
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, TORINO, Italy
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32
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Schalamuk S, Velazquez S, Chidichimo H, Cabello M. Fungal spore diversity of arbuscular mycorrhizal fungi associated with spring wheat: effects of tillage. Mycologia 2017. [DOI: 10.1080/15572536.2006.11832708] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | | | | | - M. Cabello
- Instituto de Botánica Spegazzini, Avenida 53 Nu. 477, 1900 La Plata, Argentina
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33
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Krishnamoorthy R, Premalatha N, Karthik M, Anandham R, Senthilkumar M, Gopal NO, Selvakumar G, Sa T. Molecular Markers for the Identification and Diversity Analysis of Arbuscular Mycorrhizal Fungi (AMF). Fungal Biol 2017. [DOI: 10.1007/978-3-319-34106-4_8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Nadeau MB, P. Khasa D. Edaphic Selection Pressures as Drivers of Contrasting White Spruce Ectomycorrhizal Fungal Community Structure and Diversity in the Canadian Boreal Forest of Abitibi-Témiscamingue Region. PLoS One 2016; 11:e0166420. [PMID: 27835688 PMCID: PMC5106017 DOI: 10.1371/journal.pone.0166420] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 10/30/2016] [Indexed: 11/19/2022] Open
Abstract
Little is known about edaphic selection pressures as drivers of contrasting white spruce ectomycorrhizal fungal community structure and diversity in the Canadian boreal forest. We hypothesized that community composition differs among the four sites sampled-nursery, mining site, forest edge, and natural forest. Ectomycorrhizal (ECM) fungal community structure and diversity was studied at the four locations with soil fertility gradient through morpho-molecular and phylogenetic analyses in relationships with rhizospheric soil chemical properties. 41 different species were identified. Mining site had a significantly different species composition than the surrounding environments. Soil pH and percentage of roots colonized by ECM fungi increased while soil P, N, Fe, C, K, Mg, Al, Ca, and Na contents declined across the soil fertility gradient: nursery → natural forest → forest edge → mining site. Contrary to the preference of acid soils by ECM fungi, a few ecologically adapted to high pH, poor soil chemical fertility, and low organic matter content colonize white spruce roots on the non-acidogenic mining site, allowing natural regeneration of white spruce seedlings. Other ECM fungi are adapted to high fertigation level of commercial nursery. This study clearly shows the contrasting difference in white spruce ectomycorrhizal fungal community structure and diversity driven by edaphic selection pressures.
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Affiliation(s)
- Martin B. Nadeau
- Centre for Forest Research, Institute of Integrative and Systems Biology, and Canadian Research Chair in Forest and Environmental Genomics, Université Laval, Quebec city, QC, Canada, G1V0A6
| | - Damase P. Khasa
- Centre for Forest Research, Institute of Integrative and Systems Biology, and Canadian Research Chair in Forest and Environmental Genomics, Université Laval, Quebec city, QC, Canada, G1V0A6
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35
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John J, Kernaghan G, Lundholm J. The potential for mycorrhizae to improve green roof function. Urban Ecosyst 2016. [DOI: 10.1007/s11252-016-0573-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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A review of symbiotic fungal endophytes in lycophytes and ferns – a global phylogenetic and ecological perspective. Symbiosis 2016. [DOI: 10.1007/s13199-016-0436-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Cely MVT, de Oliveira AG, de Freitas VF, de Luca MB, Barazetti AR, Dos Santos IMO, Gionco B, Garcia GV, Prete CEC, Andrade G. Inoculant of Arbuscular Mycorrhizal Fungi (Rhizophagus clarus) Increase Yield of Soybean and Cotton under Field Conditions. Front Microbiol 2016; 7:720. [PMID: 27303367 PMCID: PMC4880672 DOI: 10.3389/fmicb.2016.00720] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 04/29/2016] [Indexed: 12/02/2022] Open
Abstract
Nutrient availability is an important factor in crop production, and regular addition of chemical fertilizers is the most common practice to improve yield in agrosystems for intensive crop production. The use of some groups of microorganisms that have specific activity providing nutrients to plants is a good alternative, and arbuscular mycorrhizal fungi (AMF) enhance plant nutrition by providing especially phosphorus, improving plant growth and increasing crop production. Unfortunately, the use of AMF as an inoculant on a large scale is not yet widely used, because of several limitations in obtaining a large amount of inoculum due to several factors, such as low growth, the few species of AMF domesticated under in vitro conditions, and high competition with native AMF. The objective of this work was to test the infectivity of a Rhizophagus clarus inoculum and its effectiveness as an alternative for nutrient supply in soybean (Glycine max L.) and cotton (Gossypium hirsutum L.) when compared with conventional chemical fertilization under field conditions. The experiments were carried out in a completely randomized block design with five treatments: Fertilizer, AMF, AMF with Fertilizer, AMF with 1/2 Fertilizer, and the Control with non-inoculated and non-fertilized plants. The parameters evaluated were AMF root colonization and effect of inoculation on plant growth, nutrient absorption and yield. The results showed that AMF inoculation increased around 20 % of root colonization in both soybean and cotton; nutrients analyses in vegetal tissues showed increase of P and nitrogen content in inoculated plants, these results reflect in a higher yield. Our results showed that, AMF inoculation increase the effectiveness of fertilizer application in soybean and reduce the fertilizer dosage in cotton.
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Affiliation(s)
- Martha V T Cely
- Laboratório de Microbiologia, Instituto de Ciências Agrarias e Ambientais, Universidade Federal de Mato Grosso Sinop, Brazil
| | - Admilton G de Oliveira
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina Londrina, Brazil
| | - Vanessa F de Freitas
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina Londrina, Brazil
| | - Marcelo B de Luca
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina Londrina, Brazil
| | - André R Barazetti
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina Londrina, Brazil
| | - Igor M O Dos Santos
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina Londrina, Brazil
| | - Barbara Gionco
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina Londrina, Brazil
| | | | - Cássio E C Prete
- Fazenda Escola, Departamento de Agronomia, Universidade Estadual de Londrina Londrina, Brazil
| | - Galdino Andrade
- Laboratório de Ecologia Microbiana, Departamento de Microbiologia, Universidade Estadual de Londrina Londrina, Brazil
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Revillini D, Gehring CA, Johnson NC. The role of locally adapted mycorrhizas and rhizobacteria in plant–soil feedback systems. Funct Ecol 2016. [DOI: 10.1111/1365-2435.12668] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel Revillini
- Department of Biological Sciences Northern Arizona University PO Box 5640 Flagstaff AZ 86011 USA
| | - Catherine A. Gehring
- Department of Biological Sciences Northern Arizona University PO Box 5640 Flagstaff AZ 86011 USA
| | - Nancy Collins Johnson
- Department of Biological Sciences Northern Arizona University PO Box 5640 Flagstaff AZ 86011 USA
- School of Earth Sciences and Environmental Sustainability Northern Arizona University PO Box 5694 Flagstaff AZ 86011 USA
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39
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Smith AJH, Potvin LR, Lilleskov EA. Fertility-dependent effects of ectomycorrhizal fungal communities on white spruce seedling nutrition. MYCORRHIZA 2015; 25:649-662. [PMID: 25904341 DOI: 10.1007/s00572-015-0640-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 04/06/2015] [Indexed: 06/04/2023]
Abstract
Ectomycorrhizal fungi (EcMF) typically colonize nursery seedlings, but nutritional and growth effects of these communities are only partly understood. To examine these effects, Picea glauca seedlings collected from a tree nursery naturally colonized by three dominant EcMF were divided between fertilized and unfertilized treatments. After one growing season seedlings were harvested, ectomycorrhizas identified using DNA sequencing, and seedlings analyzed for leaf nutrient concentration and content, and biomass parameters. EcMF community structure-nutrient interactions were tested using nonmetric multidimensional scaling (NMDS) combined with vector analysis of foliar nutrients and biomass. We identified three dominant species: Amphinema sp., Atheliaceae sp., and Thelephora terrestris. NMDS + envfit revealed significant community effects on seedling nutrition that differed with fertilization treatment. PERMANOVA and regression analyses uncovered significant species effects on host nutrient concentration, content, and stoichiometry. Amphinema sp. had a significant positive effect on phosphorus (P), calcium and zinc concentration, and P content; in contrast, T. terrestris had a negative effect on P concentration. In the unfertilized treatment, percent abundance of the Amphinema sp. negatively affected foliar nitrogen (N) concentration but not content, and reduced foliar N/P. In fertilized seedlings, Amphinema sp. was positively related to foliar concentrations of N, magnesium, and boron, and both concentration and content of manganese, and Atheliaceae sp. had a negative relationship with P content. Findings shed light on the community and species effects on seedling condition, revealing clear functional differences among dominants. The approach used should be scalable to explore function in more complex communities composed of unculturable EcMF.
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Affiliation(s)
- Alistair J H Smith
- Michigan Technological University, 1400 Townsend Dr, Houghton, MI, 49931, USA
| | - Lynette R Potvin
- Northern Research Station, US Forest Service, 410 MacInnes Drive, Houghton, MI, 49931-1199, USA
| | - Erik A Lilleskov
- Northern Research Station, US Forest Service, 410 MacInnes Drive, Houghton, MI, 49931-1199, USA.
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Jin J, Tang C, Sale P. The impact of elevated carbon dioxide on the phosphorus nutrition of plants: a review. ANNALS OF BOTANY 2015; 116:987-99. [PMID: 26113632 PMCID: PMC4640125 DOI: 10.1093/aob/mcv088] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 03/06/2015] [Accepted: 04/29/2015] [Indexed: 05/03/2023]
Abstract
BACKGROUND Increasing attention is being focused on the influence of rapid increases in atmospheric CO2 concentration on nutrient cycling in ecosystems. An understanding of how elevated CO2 affects plant utilization and acquisition of phosphorus (P) will be critical for P management to maintain ecosystem sustainability in P-deficient regions. SCOPE This review focuses on the impact of elevated CO2 on plant P demand, utilization in plants and P acquisition from soil. Several knowledge gaps on elevated CO2-P associations are highlighted. CONCLUSIONS Significant increases in P demand by plants are likely to happen under elevated CO2 due to the stimulation of photosynthesis, and subsequent growth responses. Elevated CO2 alters P acquisition through changes in root morphology and increases in rooting depth. Moreover, the quantity and composition of root exudates are likely to change under elevated CO2, due to the changes in carbon fluxes along the glycolytic pathway and the tricarboxylic acid cycle. As a consequence, these root exudates may lead to P mobilization by the chelation of P from sparingly soluble P complexes, by the alteration of the biochemical environment and by changes to microbial activity in the rhizosphere. Future research on chemical, molecular, microbiological and physiological aspects is needed to improve understanding of how elevated CO2 might affect the use and acquisition of P by plants.
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Affiliation(s)
- Jian Jin
- Centre for AgriBioscience, La Trobe University, Melbourne Campus, Bundoora, Vic. 3086, Australia and Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, China
| | - Caixian Tang
- Centre for AgriBioscience, La Trobe University, Melbourne Campus, Bundoora, Vic. 3086, Australia and
| | - Peter Sale
- Centre for AgriBioscience, La Trobe University, Melbourne Campus, Bundoora, Vic. 3086, Australia and
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Davis BJ, Phillips RD, Wright M, Linde CC, Dixon KW. Continent-wide distribution in mycorrhizal fungi: implications for the biogeography of specialized orchids. ANNALS OF BOTANY 2015; 116:413-21. [PMID: 26105186 PMCID: PMC4549956 DOI: 10.1093/aob/mcv084] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/21/2014] [Accepted: 04/27/2015] [Indexed: 05/03/2023]
Abstract
BACKGROUND AND AIMS Although mycorrhizal associations are predominantly generalist, specialized mycorrhizal interactions have repeatedly evolved in Orchidaceae, suggesting a potential role in limiting the geographical range of orchid species. In particular, the Australian orchid flora is characterized by high mycorrhizal specialization and short-range endemism. This study investigates the mycorrhizae used by Pheladenia deformis, one of the few orchid species to occur across the Australian continent. Specifically, it examines whether P. deformis is widely distributed through using multiple fungi or a single widespread fungus, and if the fungi used by Australian orchids are widespread at the continental scale. METHODS Mycorrhizal fungi were isolated from P. deformis populations in eastern and western Australia. Germination trials using seed from western Australian populations were conducted to test if these fungi supported germination, regardless of the region in which they occurred. A phylogenetic analysis was undertaken using isolates from P. deformis and other Australian orchids that use the genus Sebacina to test for the occurrence of operational taxonomic units (OTUs) in eastern and western Australia. KEY RESULTS With the exception of one isolate, all fungi used by P. deformis belonged to a single fungal OTU of Sebacina. Fungal isolates from eastern and western Australia supported germination of P. deformis. A phylogenetic analysis of Australian Sebacina revealed that all of the OTUs that had been well sampled occurred on both sides of the continent. CONCLUSIONS The use of a widespread fungal OTU in P. deformis enables a broad distribution despite high mycorrhizal specificity. The Sebacina OTUs that are used by a range of Australian orchids occur on both sides of the continent, demonstrating that the short-range endemism prevalent in the orchids is not driven by fungal species with narrow distributions. Alternatively, a combination of specific edaphic requirements and a high incidence of pollination by sexual deception may explain biogeographic patterns in southern Australian orchids.
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Affiliation(s)
- Belinda J Davis
- Kings Park and Botanic Garden, West Perth, 6005, Western Australia, School of Plant Biology, The University of Western Australia, Nedlands, 6009, Western Australia,
| | - Ryan D Phillips
- Kings Park and Botanic Garden, West Perth, 6005, Western Australia
| | - Magali Wright
- Graduate School of Land and Environment, The University of Melbourne, Burnley Campus, Richmond, Victoria 3121, Australia
| | - Celeste C Linde
- Evolution, Ecology and Genetics, Research School of Biology, The Australian National University, Canberra, Australian Capital Territory 2601, Australia and
| | - Kingsley W Dixon
- Kings Park and Botanic Garden, West Perth, 6005, Western Australia, School of Plant Biology, The University of Western Australia, Nedlands, 6009, Western Australia
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Maltz MR, Treseder KK. Sources of inocula influence mycorrhizal colonization of plants in restoration projects: a meta-analysis. Restor Ecol 2015. [DOI: 10.1111/rec.12231] [Citation(s) in RCA: 112] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Mia R. Maltz
- Department of Ecology and Evolutionary Biology; University of California; Irvine CA 92697 U.S.A
| | - Kathleen K. Treseder
- Department of Ecology and Evolutionary Biology; University of California; Irvine CA 92697 U.S.A
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McGuire KL, D'Angelo H, Brearley FQ, Gedallovich SM, Babar N, Yang N, Gillikin CM, Gradoville R, Bateman C, Turner BL, Mansor P, Leff JW, Fierer N. Responses of soil fungi to logging and oil palm agriculture in Southeast Asian tropical forests. MICROBIAL ECOLOGY 2015; 69:733-747. [PMID: 25149283 DOI: 10.1007/s00248-014-0468-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 07/17/2014] [Indexed: 06/03/2023]
Abstract
Human land use alters soil microbial composition and function in a variety of systems, although few comparable studies have been done in tropical forests and tropical agricultural production areas. Logging and the expansion of oil palm agriculture are two of the most significant drivers of tropical deforestation, and the latter is most prevalent in Southeast Asia. The aim of this study was to compare soil fungal communities from three sites in Malaysia that represent three of the most dominant land-use types in the Southeast Asia tropics: a primary forest, a regenerating forest that had been selectively logged 50 years previously, and a 25-year-old oil palm plantation. Soil cores were collected from three replicate plots at each site, and fungal communities were sequenced using the Illumina platform. Extracellular enzyme assays were assessed as a proxy for soil microbial function. We found that fungal communities were distinct across all sites, although fungal composition in the regenerating forest was more similar to the primary forest than either forest community was to the oil palm site. Ectomycorrhizal fungi, which are important associates of the dominant Dipterocarpaceae tree family in this region, were compositionally distinct across forests, but were nearly absent from oil palm soils. Extracellular enzyme assays indicated that the soil ecosystem in oil palm plantations experienced altered nutrient cycling dynamics, but there were few differences between regenerating and primary forest soils. Together, these results show that logging and the replacement of primary forest with oil palm plantations alter fungal community and function, although forests regenerating from logging had more similarities with primary forests in terms of fungal composition and nutrient cycling potential. Since oil palm agriculture is currently the mostly rapidly expanding equatorial crop and logging is pervasive across tropical ecosystems, these findings may have broad applicability.
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Affiliation(s)
- K L McGuire
- Department of Biology, Barnard College of Columbia University, 3009 Broadway, New York, NY, 10027, USA,
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Lee CT. Inherent demographic stability in mutualist-resource-exploiter interactions. Am Nat 2015; 185:551-61. [PMID: 25811088 DOI: 10.1086/680228] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Core principles of ecological theory predict that, in the absence of other factors, mutualisms should experience destabilizing positive feedback and should be vulnerable to extinction through competitive exclusion by exploiter species. Many effective stabilizing mechanisms address one issue or the other, and many turn upon additional features. Using an explicitly demographic approach, I show that indirect, demography-mediated interactions between mutualists and exploiters can enable mutualist-exploiter coexistence, which in turn can stabilize the abundances of mutualists, exploiters, and their shared resources. This occurs because of the distinct resource demographic responses that are inherent to interaction with mutualistic and exploitative partners and can occur in long-lasting, exclusive interactions, such as protection mutualisms, as well as in apparently very different, short-lived mutualistic interactions, such as pollination. The key necessary factor-demographic response to interspecific interaction-is common in nature. Some demographic structure is also necessary and is generated through interspecific interaction in long-lasting associations; it is also very common in natural populations. Thus, the explicitly demographic and multispecies approach taken here constitutes a potentially promising single explanation for the apparent stability of mutualism in a wide range of natural systems.
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Affiliation(s)
- Charlotte T Lee
- Department of Biology, Duke University, Durham, North Carolina 27708
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Chagnon PL, Bainard LD. Using molecular biology to study mycorrhizal fungal community ecology: Limits and perspectives. PLANT SIGNALING & BEHAVIOR 2015; 10:e1046668. [PMID: 26251887 PMCID: PMC4623061 DOI: 10.1080/15592324.2015.1046668] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Molecular tools have progressively replaced morphological approaches to characterize microbial communities in nature. Arbuscular mycorrhizal (AM) fungi are no exception to this rule. Yet, one challenge posed by these symbionts is that they colonize simultaneously both plant roots and soil, which complicates their detection and quantification. In most studies conducted to date, AM fungal communities have been characterized from roots only, soil only or spores only. Here, we discuss the pitfalls associated to drawing ecological inferences using such datasets. We also conclude by arguing that molecular biology will contribute most to advance knowledge in AM fungal ecology if it is integrated into broader perspectives taking into account the natural history of these organisms. This calls for a better merging of molecular and morphological approaches, and the establishment of intensive, long-term research programs.
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Affiliation(s)
- Pierre-Luc Chagnon
- University of Alberta; Edmonton, Canada
- Correspondence to: Chagnon, Pierre-Luc;
| | - Luke D Bainard
- Semiarid Prairie Agricultural Research Center; Agriculture and Agri-Food Canada; Swift Current, Canada
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Mohan JE, Cowden CC, Baas P, Dawadi A, Frankson PT, Helmick K, Hughes E, Khan S, Lang A, Machmuller M, Taylor M, Witt CA. Mycorrhizal fungi mediation of terrestrial ecosystem responses to global change: mini-review. FUNGAL ECOL 2014. [DOI: 10.1016/j.funeco.2014.01.005] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kessler M, Güdel R, Salazar L, Homeier J, Kluge J. Impact of mycorrhization on the abundance, growth and leaf nutrient status of ferns along a tropical elevational gradient. Oecologia 2014; 175:887-900. [PMID: 24719210 DOI: 10.1007/s00442-014-2941-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 03/28/2014] [Indexed: 11/24/2022]
Abstract
Mycorrhizal fungi are crucial for the ecological success of land plants, providing their hosts with nutrients in exchange for organic C. However, not all plants are mycorrhizal, especially ferns, of which about one-third of the species lack this symbiosis. Because the mycorrhizal status is evolutionarily ancestral, this lack of mycorrhizae must have ecological advantages, but what these advantages are and how they affect the competitive ability of non-mycorrhizal plants under natural conditions is currently unknown. To address this uncertainty, we studied terrestrial fern assemblages and species abundances as well as their mycorrhization status, leaf nutrient concentration and relative annual growth along an elevational gradient in the Ecuadorian Andes (500-4,000 m). We surveyed the mycorrhizal status of 375 root samples belonging to 85 species, and found mycorrhizae in 89% of the samples. The degree of mycorrhization decreased with elevation but was unrelated to soil nutrients. Species with mycorrhizae were significantly more abundant than non-mycorrhizal species, but non-mycorrhizal species had significantly higher relative growth and concentrations of leaf N, P, Mg, and Ca. Our study thus shows that despite lower abundances, non-mycorrhizal fern species did not appear to be limited in their growth or nutrient supply relative to mycorrhizal ones. As a basis for future studies, we hypothesize that non-mycorrhizal fern species may be favoured in special microhabitats of the forest understory with high soil nutrient or water availability, or that the ecological benefit of mycorrhizae is not related to nutrient uptake but rather to, for example, pathogen resistance.
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Affiliation(s)
- Michael Kessler
- Institute of Systematic Botany, University of Zurich, Zollikerstrasse 107, 8008, Zurich, Switzerland,
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