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Arenas F, López-García Á, Berná LM, Morte A, Navarro-Ródenas A. Desert truffle mycorrhizosphere harbors organic acid releasing plant growth-promoting rhizobacteria, essentially during the truffle fruiting season. MYCORRHIZA 2022; 32:193-202. [PMID: 35043240 PMCID: PMC8907101 DOI: 10.1007/s00572-021-01067-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 12/28/2021] [Indexed: 06/14/2023]
Abstract
Desert truffle is becoming a new crop in semiarid areas. Climatic parameters and the presence of microorganisms influence the host plant physiology and alter desert truffle production. Desert truffle plants present a typical summer deciduous plant phenology divided into four stages: summer dormancy, autumn bud break, winter photosynthetic activity, and spring fruiting. We hypothesize that the bacterial community associated with desert truffle plants will show a seasonal trend linked to their plant growth-promoting rhizobacteria (PGPR) traits. This information will provide us with a better understanding about its potential role in this symbiosis and possible management implementations. Bacteria were isolated from root-adhering soil at the four described seasons. A total of 417 isolated bacteria were phenotypically and biochemically characterized and gathered by molecular analysis into 68 operational taxonomic units (OTUs). They were further characterized for PGPR traits such as indole acetic acid production, siderophore production, calcium phosphate solubilization, and ACCD (1-amino-cyclopropane-1-carboxilatedeaminase) activity. These PGPR traits were used to infer functional PGPR diversity and cultivable bacterial OTU composition at different phenological moments. The different seasons induced shifts in the OTU composition linked to their PGPR traits. Summer was the phenological stage with the lowest microbial diversity and PGPR functions, whereas spring was the most active one. Among the PGPR traits analyzed, P-solubilizing rhizobacteria were harbored in the mycorrhizosphere during desert truffle fruiting in spring.
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Affiliation(s)
- Francisco Arenas
- Dpto. Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, CEIR "Campus Mare Nostrum", Campus de Espinardo, 30100, Murcia, Spain
| | - Álvaro López-García
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín-CSIC, Calle Prof. Albareda, 18008, Granada, Spain
- Department of Animal Biology, Plant Biology and Ecology, Universidad de Jaén, Jaén, Spain
- Instituto Interuniversitario de Investigación del Sistema Tierra en Andalucía (IISTA), Av. del Mediterráneo, 18006, Granada, S/N, Spain
| | - Luis Miguel Berná
- Dpto. Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, CEIR "Campus Mare Nostrum", Campus de Espinardo, 30100, Murcia, Spain
| | - Asunción Morte
- Dpto. Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, CEIR "Campus Mare Nostrum", Campus de Espinardo, 30100, Murcia, Spain
| | - Alfonso Navarro-Ródenas
- Dpto. Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, CEIR "Campus Mare Nostrum", Campus de Espinardo, 30100, Murcia, Spain.
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Querejeta JI, Schlaeppi K, López-García Á, Ondoño S, Prieto I, van der Heijden MGA, Del Mar Alguacil M. Lower relative abundance of ectomycorrhizal fungi under a warmer and drier climate is linked to enhanced soil organic matter decomposition. THE NEW PHYTOLOGIST 2021; 232:1399-1413. [PMID: 34342894 DOI: 10.1111/nph.17661] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
The aboveground impacts of climate change receive extensive research attention, but climate change could also alter belowground processes such as the delicate balance between free-living fungal decomposers and nutrient-scavenging mycorrhizal fungi that can inhibit decomposition through a mechanism called the Gadgil effect. We investigated how climate change-induced reductions in plant survival, photosynthesis and productivity alter soil fungal community composition in a mixed arbuscular/ectomycorrhizal (AM/EM) semiarid shrubland exposed to experimental warming (W) and/or rainfall reduction (RR). We hypothesised that increased EM host plant mortality under a warmer and drier climate might decrease ectomycorrhizal fungal (EMF) abundance, thereby favouring the proliferation and activity of fungal saprotrophs. The relative abundance of EMF sequences decreased by 57.5% under W+RR, which was accompanied by reductions in the activity of hydrolytic enzymes involved in the acquisition of organic-bound nutrients by EMF and their host plants. W+RR thereby created an enhanced potential for soil organic matter (SOM) breakdown and nitrogen mineralisation by decomposers, as revealed by 127-190% increases in dissolved organic carbon and nitrogen, respectively, and decreasing SOM content in soil. Climate aridification impacts on vegetation can cascade belowground through shifts in fungal guild structure that alter ecosystem biogeochemistry and accelerate SOM decomposition by reducing the Gadgil effect.
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Affiliation(s)
- José Ignacio Querejeta
- Department of Soil and Water Conservation (CEBAS-CSIC), CSIC-Centro de Edafología y Biología Aplicada del Segura, PO Box 164, Campus de Espinardo, 30100, Murcia, Spain
| | - Klaus Schlaeppi
- Plant-Soil-Interactions, Institute for Sustainability Sciences, Agroscope, Reckenholzstrasse 191, 8046, Zürich, Switzerland
- Institute of Plant Sciences, University of Bern, Altenbergrain 21, 3013, Bern, Switzerland
- Department of Environmental Sciences, University of Basel, Bernoullistrasse 32, 4056, Basel, Switzerland
| | - Álvaro López-García
- Soil Microbiology and Symbiotic Systems Department, Estación Experimental del Zaidín (EEZ-CSIC), Profesor Albareda 1, Granada, 18008, Spain
| | - Sara Ondoño
- Department of Soil and Water Conservation (CEBAS-CSIC), CSIC-Centro de Edafología y Biología Aplicada del Segura, PO Box 164, Campus de Espinardo, 30100, Murcia, Spain
| | - Iván Prieto
- Department of Soil and Water Conservation (CEBAS-CSIC), CSIC-Centro de Edafología y Biología Aplicada del Segura, PO Box 164, Campus de Espinardo, 30100, Murcia, Spain
| | - Marcel G A van der Heijden
- Plant-Soil-Interactions, Institute for Sustainability Sciences, Agroscope, Reckenholzstrasse 191, 8046, Zürich, Switzerland
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
- Plant-Microbe-Interactions, Department of Biology, Utrecht University, 3508TB, Utrecht, the Netherlands
| | - María Del Mar Alguacil
- Soil Microbiology and Symbiotic Systems Department, Estación Experimental del Zaidín (EEZ-CSIC), Profesor Albareda 1, Granada, 18008, Spain
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Arenas F, Navarro-Ródenas A, Marqués-Gálvez JE, Ghignone S, Mello A, Morte A. Different patterns in root and soil fungal diversity drive plant productivity of the desert truffle Terfezia claveryi in plantation. Environ Microbiol 2021; 23:5917-5933. [PMID: 34320277 DOI: 10.1111/1462-2920.15688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 07/24/2021] [Accepted: 07/26/2021] [Indexed: 12/22/2022]
Abstract
The desert truffle Terfezia claveryi is one of the few mycorrhizal fungi currently in cultivation in semiarid and arid areas. Agroclimatic parameters seem to affect its annual yield, but there is no information on the influence of biotic factors. In this study, fungal diversity was analysed by high-throughput sequencing of the ITS2 rDNA region from soil and root samples to compare productive and non-productive mycorrhizal plants in a 4-years old plantation (Murcia, Spain). The fungal metaprofile was dominated by Ascomycota phylum. Desert truffle productivity was driven by different patterns of fungal species composition in soil (species replacement) and root (species richness differences). Moreover, positive associations for ectomycorrhizal and negative for arbuscular mycorrhizal guilds were found in productive roots, and positive associations for fungal parasite-plant pathogen guild in non-productive ones. Soil samples were dominated by pathotroph and saprotroph trophic modes, showing positive associations for Aureobasidium pullulans and Alternaria sp. in productive areas, and positive associations for Fusarium sp. and Mortierella sp. were found in non-productive soils. Finally, some significant OTUs were identified and associated to ascocarp producing patches, which could serve as predictive and location markers of desert truffle production.
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Affiliation(s)
- Francisco Arenas
- Departamento Biología Vegetal, Facultad de Biología, CEIR Campus Mare Nostrum (CMN, Universidad de Murcia, Campus de Espinardo, Murcia, 30100, Spain
| | - Alfonso Navarro-Ródenas
- Departamento Biología Vegetal, Facultad de Biología, CEIR Campus Mare Nostrum (CMN, Universidad de Murcia, Campus de Espinardo, Murcia, 30100, Spain
| | - José Eduardo Marqués-Gálvez
- Departamento Biología Vegetal, Facultad de Biología, CEIR Campus Mare Nostrum (CMN, Universidad de Murcia, Campus de Espinardo, Murcia, 30100, Spain
| | - Stefano Ghignone
- Institute for Sustainable Plant Protection - SS Turin, CNR, Torino, 10125, Italy
| | - Antonietta Mello
- Institute for Sustainable Plant Protection - SS Turin, CNR, Torino, 10125, Italy
| | - Asunción Morte
- Departamento Biología Vegetal, Facultad de Biología, CEIR Campus Mare Nostrum (CMN, Universidad de Murcia, Campus de Espinardo, Murcia, 30100, Spain
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Marqués‐Gálvez JE, Miyauchi S, Paolocci F, Navarro‐Ródenas A, Arenas F, Pérez‐Gilabert M, Morin E, Auer L, Barry KW, Kuo A, Grigoriev IV, Martin FM, Kohler A, Morte A. Desert truffle genomes reveal their reproductive modes and new insights into plant-fungal interaction and ectendomycorrhizal lifestyle. THE NEW PHYTOLOGIST 2021; 229:2917-2932. [PMID: 33118170 PMCID: PMC7898904 DOI: 10.1111/nph.17044] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
Desert truffles are edible hypogeous fungi forming ectendomycorrhizal symbiosis with plants of Cistaceae family. Knowledge about the reproductive modes of these fungi and the molecular mechanisms driving the ectendomycorrhizal interaction is lacking. Genomes of the highly appreciated edible desert truffles Terfezia claveryi Chatin and Tirmania nivea Trappe have been sequenced and compared with other Pezizomycetes. Transcriptomes of T. claveryi × Helianthemum almeriense mycorrhiza from well-watered and drought-stressed plants, when intracellular colonizations is promoted, were investigated. We have identified the fungal genes related to sexual reproduction in desert truffles and desert-truffles-specific genomic and secretomic features with respect to other Pezizomycetes, such as the expansion of a large set of gene families with unknown Pfam domains and a number of species or desert-truffle-specific small secreted proteins differentially regulated in symbiosis. A core set of plant genes, including carbohydrate, lipid-metabolism, and defence-related genes, differentially expressed in mycorrhiza under both conditions was found. Our results highlight the singularities of desert truffles with respect to other mycorrhizal fungi while providing a first glimpse on plant and fungal determinants involved in ecto to endo symbiotic switch that occurs in desert truffle under dry conditions.
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Affiliation(s)
- José Eduardo Marqués‐Gálvez
- Departamento de Biología Vegetal (Botánica)Facultad de BiologíaUniversidad de MurciaCampus de EspinardoMurcia30100Spain
- INRAEUMR 1136Interactions Arbres/Microorganismes (IAM)Centre INRAE GrandEst ‐ NancyUniversité de LorraineChampenoux54280France
| | - Shingo Miyauchi
- INRAEUMR 1136Interactions Arbres/Microorganismes (IAM)Centre INRAE GrandEst ‐ NancyUniversité de LorraineChampenoux54280France
| | - Francesco Paolocci
- CNR‐IBBRIstituto di Bioscienze e BiorisorseUOS di PerugiaPerugia06128Italy
| | - Alfonso Navarro‐Ródenas
- Departamento de Biología Vegetal (Botánica)Facultad de BiologíaUniversidad de MurciaCampus de EspinardoMurcia30100Spain
| | - Francisco Arenas
- Departamento de Biología Vegetal (Botánica)Facultad de BiologíaUniversidad de MurciaCampus de EspinardoMurcia30100Spain
| | - Manuela Pérez‐Gilabert
- Departamento de Bioquímica y Biología Molecular‐AUniversidad de MurciaCampus de EspinardoMurcia30100Spain
| | - Emmanuelle Morin
- INRAEUMR 1136Interactions Arbres/Microorganismes (IAM)Centre INRAE GrandEst ‐ NancyUniversité de LorraineChampenoux54280France
| | - Lucas Auer
- INRAEUMR 1136Interactions Arbres/Microorganismes (IAM)Centre INRAE GrandEst ‐ NancyUniversité de LorraineChampenoux54280France
| | - Kerrie W. Barry
- US Department of Energy Joint Genome InstituteLawrence Berkeley National LaboratoryBerkeleyCA94598USA
| | - Alan Kuo
- US Department of Energy Joint Genome InstituteLawrence Berkeley National LaboratoryBerkeleyCA94598USA
| | - Igor V. Grigoriev
- US Department of Energy Joint Genome InstituteLawrence Berkeley National LaboratoryBerkeleyCA94598USA
- Department of Plant and Microbial BiologyUniversity of California, BerkeleyBerkeleyCA94598USA
| | - Francis M. Martin
- INRAEUMR 1136Interactions Arbres/Microorganismes (IAM)Centre INRAE GrandEst ‐ NancyUniversité de LorraineChampenoux54280France
| | - Annegret Kohler
- INRAEUMR 1136Interactions Arbres/Microorganismes (IAM)Centre INRAE GrandEst ‐ NancyUniversité de LorraineChampenoux54280France
| | - Asunción Morte
- Departamento de Biología Vegetal (Botánica)Facultad de BiologíaUniversidad de MurciaCampus de EspinardoMurcia30100Spain
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Guerin-Laguette A. Successes and challenges in the sustainable cultivation of edible mycorrhizal fungi – furthering the dream. MYCOSCIENCE 2021; 62:10-28. [PMID: 37090021 PMCID: PMC9157773 DOI: 10.47371/mycosci.2020.11.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/19/2020] [Accepted: 11/09/2020] [Indexed: 01/08/2023]
Abstract
The cultivation of edible mycorrhizal fungi (EMF) has made great progress since the first cultivation of Tuber melanosporum in 1977 but remains in its infancy. Five cultivation steps are required: (1) mycorrhizal synthesis, (2) mycorrhiza development and acclimation, (3) out-planting of mycorrhizal seedlings, (4) onset of fructification, and (5) performing tree orchards. We provide examples of successes and challenges associated with each step, including fruiting of the prestigious chanterelles in Japan recently. We highlight the challenges in establishing performing tree orchards. We report on the monitoring of two orchards established between Lactarius deliciosus (saffron milk cap) and pines in New Zealand. Saffron milk caps yields reached 0.4 and 1100 kg/ha under Pinus radiata and P. sylvestris 6 and 9 y after planting, respectively. Canopy closure began under P. radiata 7 y after planting, followed by a drastic reduction of yields, while P. sylvestris yields still hovered at 690 to 780 kg/ha after 11 y, without canopy closure. The establishment of full-scale field trials to predict yields is crucial to making the cultivation of EMF a reality in tomorrow's cropping landscape. Sustainable EMF cultivation utilizing trees in non-forested land could contribute to carbon storage, while providing revenue and other ecosystem services.
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Affiliation(s)
- Alexis Guerin-Laguette
- Microbial Systems for Plant Protection, The New Zealand Institute for Plant & Food Research Limited
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Marqués-Gálvez JE, Navarro-Ródenas A, Peguero-Pina JJ, Arenas F, Guarnizo AL, Gil-Pelegrín E, Morte A. Elevated atmospheric CO 2 modifies responses to water-stress and flowering of Mediterranean desert truffle mycorrhizal shrubs. PHYSIOLOGIA PLANTARUM 2020; 170:537-549. [PMID: 32869857 DOI: 10.1111/ppl.13190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/17/2020] [Accepted: 08/12/2020] [Indexed: 06/11/2023]
Abstract
Predicted increases in atmospheric concentration of carbon dioxide (CO2 ) coupled with increased temperatures and drought are expected to strongly influence the development of most of the plant species in the world, especially in areas with high risk of desertification like the Mediterranean basin. Helianthemum almeriense is an ecologically important Mediterranean shrub with an added interest because it serves as the host for the Terfezia claveryi mycorrhizal fungus, which is a desert truffle with increasingly commercial interest. Although both plant and fungi are known to be well adapted to dry conditions, it is still uncertain how the increase in atmospheric CO2 will influence them. In this article we have addressed the physiological responses of H. almeriense × T. claveryi mycorrhizal plants to increases in atmospheric CO2 coupled with drought and high vapor pressure deficit. This work reports one of the few estimations of mesophyll conductance in a drought deciduous Mediterranean shrub and evaluates its role in photosynthesis limitation. High atmospheric CO2 concentrations help desert truffle mycorrhizal plants to cope with the adverse effects of progressive drought during Mediterranean springs by improving carbon net assimilation, intrinsic water use efficiency and dispersal of the species through increased flowering events.
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Affiliation(s)
- José Eduardo Marqués-Gálvez
- Departamento de Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, Campus de Espinardo, Murcia, Spain
| | - Alfonso Navarro-Ródenas
- Departamento de Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, Campus de Espinardo, Murcia, Spain
| | - José Javier Peguero-Pina
- Unidad de Recursos Forestales, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Avda. Montañana 930, 50059, Zaragoza, Spain
- Instituto Agroalimentario de Aragón - IA2 (CITA-Universidad de Zaragoza), Zaragoza, Spain
| | - Francisco Arenas
- Departamento de Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, Campus de Espinardo, Murcia, Spain
| | - Angel Luigi Guarnizo
- Departamento de Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, Campus de Espinardo, Murcia, Spain
| | - Eustaquio Gil-Pelegrín
- Unidad de Recursos Forestales, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Avda. Montañana 930, 50059, Zaragoza, Spain
| | - Asunción Morte
- Departamento de Biología Vegetal (Botánica), Facultad de Biología, Universidad de Murcia, Campus de Espinardo, Murcia, Spain
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