Multitrophic interactions in the rhizosphere microbiome of wheat: from bacteria and fungi to protists

A - Papers appearing in refereed journals

Rossmann, M., Perez-Jaramillo, J. E., Kavamura, V. N., Chiaramonte, J. B., Dumack, K., Fiore-Donno, A. M., Mendes, L. W., Ferreira, M. M. C., Bonkowski, M., Raaijmakers, J. M., Mauchline, T. H. and Mendes, R. 2020. Multitrophic interactions in the rhizosphere microbiome of wheat: from bacteria and fungi to protists. FEMS Microbiology Ecology. 96 (4), p. fiaa032.

AuthorsRossmann, M., Perez-Jaramillo, J. E., Kavamura, V. N., Chiaramonte, J. B., Dumack, K., Fiore-Donno, A. M., Mendes, L. W., Ferreira, M. M. C., Bonkowski, M., Raaijmakers, J. M., Mauchline, T. H. and Mendes, R.
Abstract

Plants modulate the soil microbiota by root exudation assembling a complex rhizosphere microbiome with organisms spanning different trophic levels. Here, we assessed the diversity of bacterial, fungal and cercozoan communities in landraces and modern varieties of wheat. The dominant taxa within each group were the bacterial phyla Proteobacteria, Actinobacteria and Acidobacteria; the fungi phyla Ascomycota, Chytridiomycota and Basidiomycota; and the Cercozoa classes Sarcomonadea, Thecofilosea and Imbricatea. We showed that microbial networks of the wheat landraces formed a more intricate network topology than that of modern wheat cultivars, suggesting that breeding selection resulted in a reduced ability to recruit specific microbes in the rhizosphere. The high connectedness of certain cercozoan taxa to bacteria and fungi indicated trophic network hierarchies where certain predators gain predominance over others. Positive correlations between protists and bacteria in landraces were preserved as a subset in cultivars as was the case for the Sarcomonadea class with Actinobacteria. The correlations between the microbiome structure and plant genotype observed in our results suggest the importance of top-down control by organisms of higher trophic levels as a key factor for understanding the drivers of microbiome community assembly in the rhizosphere

KeywordsRhizosphere microbiome; Microbiome assembly; Plant-microbe interactions; 16S rRNA amplicon sequencing; 18S rRNA amplicon sequencing; ITS amplicon sequencing; Protists
Year of Publication2020
JournalFEMS Microbiology Ecology
Journal citation96 (4), p. fiaa032
Digital Object Identifier (DOI)doi:10.1093/femsec/fiaa032
Web address (URL)https://academic.oup.com/femsec/article-abstract/96/4/fiaa032/5775476?redirectedFrom=fulltext
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeBilateral BBSRC - Embrapa. Exploitation of the rhizosphere microbiome for sustainable wheat production
Optimisation of nutrients in soil-plant systems: How can we control nitrogen cycling in soil?
S2N - Soil to Nutrition - Work package 1 (WP1) - Optimising nutrient flows and pools in the soil-plant-biota system
Output statusPublished
Publication dates
Online03 Mar 2020
Publication process dates
Accepted28 Feb 2020
PublisherOxford University Press (OUP)
ISSN0168-6496

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