Genome-wide gene expression changes of Pseudomonas veronii 1YdBTEX2 during bioaugmentation in polluted soils.

Details

Serval ID
serval:BIB_48CD2F7B7CBA
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Genome-wide gene expression changes of Pseudomonas veronii 1YdBTEX2 during bioaugmentation in polluted soils.
Journal
Environmental microbiome
Author(s)
Morales M., Sentchilo V., Hadadi N., van der Meer J.R.
ISSN
2524-6372 (Electronic)
ISSN-L
2524-6372
Publication state
Published
Issued date
29/04/2021
Peer-reviewed
Oui
Volume
16
Number
1
Pages
8
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Abstract
Bioaugmentation aims to use the capacities of specific bacterial strains inoculated into sites to enhance pollutant biodegradation. Bioaugmentation results have been mixed, which has been attributed to poor inoculant growth and survival in the field, and, consequently, moderate catalytic performance. However, our understanding of biodegradation activity mostly comes from experiments conducted under laboratory conditions, and the processes occurring during adaptation and invasion of inoculants into complex environmental microbiomes remain poorly known. The main aim of this work was thus to study the specific and different cellular reactions of an inoculant for bioaugmentation during adaptation, growth and survival in natural clean and contaminated non-sterile soils, in order to better understand factors limiting bioaugmentation.
As inoculant we focused on the monoaromatic compound-degrading bacterium Pseudomonas veronii 1YdBTEX2. The strain proliferated in all but one soil types in presence and in absence of exogenously added toluene. RNAseq and differential genome-wide gene expression analysis illustrated both a range of common soil responses such as increased nutrient scavenging and recycling, expression of defense mechanisms, as well as environment-specific reactions, notably osmoprotection and metal homeostasis. The core metabolism of P. veronii remained remarkably constant during exponential growth irrespective of the environment, with slight changes in cofactor regeneration pathways, possibly needed for balancing defense reactions.
P. veronii displayed a versatile global program, enabling it to adapt to a variety of soil environments in the presence and even in absence of its target pollutant toluene. Our results thus challenge the widely perceived dogma of poor survival and growth of exogenous inoculants in complex microbial ecosystems such as soil and provide a further basis to developing successful bioaugmentation strategies.
Keywords
Inoculation, Invasion, RNAseq, Survival
Pubmed
Web of science
Open Access
Yes
Create date
19/05/2021 13:40
Last modification date
25/08/2021 6:38
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