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A footprint of plant eco-geographic adaptation on the composition of the barley rhizosphere bacterial microbiota
Year:
2020
Source of publication :
Scientific Reports
Authors :
Fridman, Eyal
;
.
Volume :
10
Co-Authors:

Alegria Terrazas, R.- Plant Sciences, School of Life Sciences, University of Dundee, Dundee, United Kingdom
Balbirnie-Cumming, K.- Plant Sciences, School of Life Sciences, University of Dundee, Dundee, United Kingdom.
Morris, J.- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom.  
Hedley, P.E. - Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom  
Russell, J. - Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom  
Paterson, E. - Ecological Sciences, The James Hutton Institute, Aberdeen, United Kingdom.
Baggs, E.M. - Global Academy of Agriculture and Food Security, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, United Kingdom.
Bulgarelli, D.- Plant Sciences, School of Life Sciences, University of Dundee, Dundee, United Kingdom

Facilitators :
From page:
0
To page:
0
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Total pages:
1
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Abstract:

The microbiota thriving in the rhizosphere, the thin layer of soil surrounding plant roots, plays a critical role in plant’s adaptation to the environment. Domestication and breeding selection have progressively differentiated the microbiota of modern crops from the ones of their wild ancestors. However, the impact of eco-geographical constraints faced by domesticated plants and crop wild relatives on recruitment and maintenance of the rhizosphere microbiota remains to be fully elucidated. Here we performed a comparative 16S rRNA gene survey of the rhizosphere of 4 domesticated and 20 wild barley (Hordeum vulgare) genotypes grown in an agricultural soil under controlled environmental conditions. We demonstrated the enrichment of individual bacteria mirrored the distinct eco-geographical constraints faced by their host plants. Unexpectedly, Elite varieties exerted a stronger genotype effect on the rhizosphere microbiota when compared with wild barley genotypes adapted to desert environments with a preferential enrichment for members of Actinobacteria. Finally, in wild barley genotypes, we discovered a limited, but significant, correlation between microbiota diversity and host genomic diversity. Our results revealed a footprint of the host’s adaptation to the environment on the assembly of the bacteria thriving at the root–soil interface. In the tested conditions, this recruitment cue layered atop of the distinct evolutionary trajectories of wild and domesticated plants and, at least in part, is encoded by the barley genome. This knowledge will be critical to design experimental approaches aimed at elucidating the recruitment cues of the barley microbiota across a range of soil types. 

Note:
Related Files :
bacterial microbiota
barley rhizosphere
Hordeum vulgare
plant eco-geographic adaptation
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More details
DOI :
10.1038/s41598-020-69672-x
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
49013
Last updated date:
02/03/2022 17:27
Creation date:
11/08/2020 13:54
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Scientific Publication
A footprint of plant eco-geographic adaptation on the composition of the barley rhizosphere bacterial microbiota
10

Alegria Terrazas, R.- Plant Sciences, School of Life Sciences, University of Dundee, Dundee, United Kingdom
Balbirnie-Cumming, K.- Plant Sciences, School of Life Sciences, University of Dundee, Dundee, United Kingdom.
Morris, J.- Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom.  
Hedley, P.E. - Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom  
Russell, J. - Cell and Molecular Sciences, The James Hutton Institute, Dundee, United Kingdom  
Paterson, E. - Ecological Sciences, The James Hutton Institute, Aberdeen, United Kingdom.
Baggs, E.M. - Global Academy of Agriculture and Food Security, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, United Kingdom.
Bulgarelli, D.- Plant Sciences, School of Life Sciences, University of Dundee, Dundee, United Kingdom

A footprint of plant eco-geographic adaptation on the composition of the barley rhizosphere bacterial microbiota

The microbiota thriving in the rhizosphere, the thin layer of soil surrounding plant roots, plays a critical role in plant’s adaptation to the environment. Domestication and breeding selection have progressively differentiated the microbiota of modern crops from the ones of their wild ancestors. However, the impact of eco-geographical constraints faced by domesticated plants and crop wild relatives on recruitment and maintenance of the rhizosphere microbiota remains to be fully elucidated. Here we performed a comparative 16S rRNA gene survey of the rhizosphere of 4 domesticated and 20 wild barley (Hordeum vulgare) genotypes grown in an agricultural soil under controlled environmental conditions. We demonstrated the enrichment of individual bacteria mirrored the distinct eco-geographical constraints faced by their host plants. Unexpectedly, Elite varieties exerted a stronger genotype effect on the rhizosphere microbiota when compared with wild barley genotypes adapted to desert environments with a preferential enrichment for members of Actinobacteria. Finally, in wild barley genotypes, we discovered a limited, but significant, correlation between microbiota diversity and host genomic diversity. Our results revealed a footprint of the host’s adaptation to the environment on the assembly of the bacteria thriving at the root–soil interface. In the tested conditions, this recruitment cue layered atop of the distinct evolutionary trajectories of wild and domesticated plants and, at least in part, is encoded by the barley genome. This knowledge will be critical to design experimental approaches aimed at elucidating the recruitment cues of the barley microbiota across a range of soil types. 

Scientific Publication
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