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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/23296

Title: Structural variability and niche differentiation in the rhizosphere and endosphere bacterial microbiome of field-grown poplar trees
Authors: Beckers, Bram
Op De Beeck, Michiel
Weyens, Nele
Wout Boerjan
Vangronsveld, Jaco
Issue Date: 2017
Citation: Microbiome, 5(25)
Abstract: Background The plant microbiome represents one of the key determinants of plant health and productivity by providing a plethora of functional capacities such as access to low-abundance nutrients, suppression of phytopathogens, and resistance to biotic and/or abiotic stressors. However, a robust understanding of the structural composition of the bacterial microbiome present in different plant microenvironments and especially the relationship between below-ground and above-ground communities has remained elusive. In this work, we addressed hypotheses regarding microbiome niche differentiation and structural stability of the bacterial communities within different ecological plant niches. Methods We sampled the rhizosphere soil, root, stem, and leaf endosphere of field-grown poplar trees (Populus tremula × Populus alba) and applied 16S rRNA amplicon pyrosequencing to unravel the bacterial communities associated with the different plant habitats. Results We found that the structural variability of rhizosphere microbiomes in field-grown poplar trees (P. tremula × P. alba) is much lower than that of the endosphere microbiomes. Furthermore, our data not only confirm microbiome niche differentiation reports at the rhizosphere soil–root interface but also clearly show additional fine-tuning and adaptation of the endosphere microbiome in the stem and leaf compartment. Each plant compartment represents an unique ecological niche for the bacterial communities. Finally, we identified the core bacterial microbiome associated with the different ecological niches of Populus. Conclusions Understanding the complex host–microbe interactions of Populus could provide the basis for the exploitation of the eukaryote–prokaryote associations in phytoremediation applications, sustainable crop production (bio-energy efficiency), and/or the production of secondary metabolites.
Notes: Beckers, B (reprint author), Hasselt Univ, Ctr Environm Sci, Agoralaan Bldg D, B-3590 Diepenbeek, Belgium. bram.beckers@uhasselt.be
URI: http://hdl.handle.net/1942/23296
DOI: 10.1186/s40168-017-0241-2
ISI #: 000397307700001
ISSN: 2049-2618
Category: A1
Type: Journal Contribution
Validation: ecoom, 2018
Appears in Collections: Research publications

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