Domestication-driven changes in plant traits associated with changes in the assembly of the rhizosphere microbiota in tetraploid wheat.

Scientific Reports
Aymé SporCyrille Violle

Abstract

Despite the large morphological and physiological changes that plants have undergone through domestication, little is known about their impact on their microbiome. Here we characterized rhizospheric bacterial and fungal communities as well as the abundance of N-cycling microbial guilds across thirty-nine accessions of tetraploid wheat, Triticum turgidum, from four domestication groups ranging from the wild subspecies to the semi dwarf elite cultivars. We identified several microbial phylotypes displaying significant variation in their relative abundance depending on the wheat domestication group with a stronger impact of domestication on fungi. The relative abundance of potential fungal plant pathogens belonging to the Sordariomycetes class decreased in domesticated compared to wild emmer while the opposite was found for members of the Glomeromycetes, which are obligate plant symbionts. The depletion of nitrifiers and of arbuscular mycorrhizal fungi in elite wheat cultivars compared to primitive domesticated forms suggests that the Green Revolution has decreased the coupling between plant and rhizosphere microbes that are potentially important for plant nutrient availability. Both plant diameter and fine root percentage exhibit...Continue Reading

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Citations

Jun 16, 2021·Frontiers in Microbiology·Barbara PivatoPhilippe Lemanceau

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Datasets Mentioned

BETA
SUB6424930

Methods Mentioned

BETA
PCR

Software Mentioned

R package mixOmics
PYNAST
ILLUMINA MiSeq Reporter
UCLUST
QIIME
DESeq2
DIABLO
MOTHUR
Greengenes
FASTTREE

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