A core of rhizosphere bacterial taxa associates with two of the world’s most isolated plant congeners

Autor: David M. Richardson, Johannes J. Le Roux, Casper Nyaradzai Kamutando, Angel Valverde, Mark G. Wright, Dominique Strasberg, Pedro W. Crous, Michael J. Wingfield
Přispěvatelé: Junta de Castilla y León, Valverde Portal, Ángel, Macquarie University [Sydney], Department of Biological Sciences [New South Wales, Australia] (Macquarie University), Macquarie University, Stellenbosch University, Centre for Invasion Biology, University of Zimbabwe (UZ), Westerdijk Fungal Biodiversity Insitute [Utrecht] (WI), Royal Netherlands Academy of Arts and Sciences (KNAW), Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria [South Africa], University of Hawaii at Manoa, Partenaires INRAE, Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Instituto de Recursos Naturales y Agrobiología de Salamanca (IRNASA), Spanish National Research Council (CSIC), PWC and MJW acknowledge support from the DSI-NRF Centre of Excellence in Plant Health Biotechnology. JJLeR and DMR acknowledge the DSI-NRF Centre of Excellence for Invasion Biology. DMR received additional support from the Oppenheimer Memorial Trust (grant 18576/03). AV was supported by the South African National Reserach Foundation (NRF) and the project 'CLU-2019-05 - IRNASA/CSIC Unit of Excellence', funded by the Junta de Castilla y Leon and co-financed by the European Union (ERDF, 'Europe drives our growth')., Valverde Portal, Ángel [0000-0003-0439-9605], Westerdijk Fungal Biodiversity Institute, Westerdijk Fungal Biodiversity Institute - Evolutionary Phytopathology
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Plant and Soil
Plant and Soil, Springer Verlag, In press, ⟨10.1007/s11104-021-05049-x⟩
Digital.CSIC. Repositorio Institucional del CSIC
instname
Plant and Soil, 468(1), 277-294. Springer Netherlands
ISSN: 0032-079X
1573-5036
DOI: 10.1007/s11104-021-05049-x⟩
Popis: 30 páginas, 8 figuras
Aims. Understanding the contributions of abiotic and biotic conditions to soil microbial diversity, structure, and function, remains a central focus in soil biology and biogeochemistry. Here we aim to determine how geography and host plant identity influence these different components of rhizosphere bacterial communities and endosymbionts associated with Acacia heterophylla on Réunion island (Mascarene archipelago, Indian Ocean) and A. koa in the Hawaiian Islands (Hawaiian archipelago, Pacific Ocean). These two tree species are remarkable: they are each other’s closest living relatives despite their habitats being more than 16 000 km apart.
Methods. Using 16S rRNA amplicon next-generation sequencing data we show that the structure of rhizosphere communities of these two acacias is largely driven by dispersal limitation between sites and local soil chemical conditions within sites.
Results. Despite high taxonomic turnover in soils collected from different sites, we found their predicted functions to be largely similar, suggestive of functional redundancy. We also identify a core of rhizosphere taxa associated with both Acacia species in both archipelagos, which included potential nitrogen-fixing mutualists. Isolation and characterisation of rhizobia from root nodules of both acacias further supported strong selection by these plants for the same Bradyrhizobium endosymbionts.
Conclusions. Overall, our data suggest that phylogenetically-closely related plants may show remarkably similar selectivity for bacterial mutualists over vast geographic distances.
We thank Jesse Eiben for lab space on Hawaii island, Marelongue field research station (OSU Réunion) for research accommodation on Réunion island, and Réunion National Park for collecting permits. Megan Koordom at Stellenbosch University provided invaluable lab support. PWC and MJW acknowledge support from the DSI-NRF Centre of Excellence in Plant Health Biotechnology. JJLeR and DMR acknowledge the DSI-NRF Centre of Excellence for Invasion Biology. DMR received additional support from the Oppenheimer Memorial Trust (grant 18576/03). AV was supported by the South African National Reserach Foundation (NRF) and the project ‘CLU-2019–05 – IRNASA/CSIC Unit of Excellence’, funded by the Junta de Castilla y León and co-financed by the European Union (ERDF; ‘Europe drives our growth’).
Databáze: OpenAIRE
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