Paraburkholderia phytofirmans PsJN isolate:LMG 22146
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA757850 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR20044900_1.fastq.gz | Fastqsanger.gz | |||
| SRR20044900_2.fastq.gz | Fastqsanger.gz | |||
| SRR20045000_1.fastq.gz | Fastqsanger.gz | |||
| SRR20045000_2.fastq.gz | Fastqsanger.gz | |||
| SRR20045100_1.fastq.gz | Fastqsanger.gz |
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Project description:Plant defense responses to biotic stresses are complex biological processes, all governed by sophisticated molecular regulations. Induced systemic resistance (ISR) is one of these defense mechanisms where beneficial bacteria or fungi prime plants to resist pathogen or pest attacks. In ISR the defense arsenal in plants remains dormant and it is only triggered by the infection, allowing a rapid response and a better allocation of plant resources. We recently described that the well-known beneficial bacterium Paraburkholderia phytofirmans PsJN is able to reduce Arabidopsis thaliana susceptibility to Pseudomonas syringae Pst DC3000 through ISR. Nevertheless, the molecular networks governing this beneficial interaction remain unknown. To tackle this issue we analyzed the temporal changes in the transcriptome of PsJN-inoculated plants before and after the infection with Pst DC3000 strain. These data were used to perform a gene network analysis to identify highly connected transcription factors that may be acting as hubs in controlling this ISR response. Before the pathogen challenge, strain PsJN regulated 405 genes (corresponding to 1.5% of the analyzed genome). PsJN-inoculated plants presented a faster and stronger transcriptional response 1-hour post infection (hpi) compared with the non-inoculated plants, which presented the highest transcriptional changes 24 hpi. A principal component analysis showed that PsJN-induced plant responses to the pathogen could be differentiated from those induced by the sole pathogen. Forty-eight transcription factors were regulated by PsJN 1 hpi, and a system biology analysis revealed a network with 4 modules where LHY, WRKY28, MYB31 and RRTF1 are highly connected transcription factors, that can be acting as hub regulators in this interaction. These modules are related to Jasmonate, Ethylene, Salicylic acid and ROS pathways. Additionally, the down- and up-regulation of ANAC32 and ORA59, respectively, support an important role of PDF1.2. These results indicate that a rapid and specific response of PsJN-inoculated plants to this virulent pathogen could be the pivotal element in the protection mechanism. A role for specific transcriptional regulators in the orchestration of this complex molecular response is also proposed
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Project description:Paraburkholderia phytofirmans OLGA172 Genome sequencing
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Project description:Whole transcriptome sequencing of B. phytofirmans PsJN colonizing potato (Solanum tuberosum L.) plants was used to analyze in planta gene activity and in the response of strain PsJN to plant stress in three different time points. The transcriptome of PsJN colonizing in vitro potato plants showed a broad array of functionalities encoded on the genome of strain PsJN. Our study indicates that endophytic B. phytofirmans PsJN cells are active inside plants. Moreover, the activity of strain PsJN is affected by plant drought stress, it senses plant stress signals and adjusts its gene expression accordingly.
2015-04-23 | E-MTAB-3524 | biostudies-arrayexpress
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Project description:Plant growth promoting rhizobacteria (PGPR) induce positive effects in plants, such as increased growth or reduced stress susceptibility. The mechanisms behind PGPR/plant interaction are poorly understood, as most studies have described short- term responses on plants and only a few studies have analyzed plant molecular responses under PGPR colonization. Transcriptional profiles were determined by microarray analysis (Affymetrix ATH1 Genome Array) in Arabidopsis thaliana plants inoculated with the PGPR bacterial model Burkholderia phytofirmans PsJN
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Project description:Paraburkholderia caledonica 376MFSha3.1 DAP-Seq epigenomics
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Project description:Plant growth promoting rhizobacteria (PGPR) induce positive effects in plants, such as increased growth or reduced stress susceptibility. The mechanisms behind PGPR/plant interaction are poorly understood, as most studies have described short- term responses on plants and only a few studies have analyzed plant molecular responses under PGPR colonization. Transcriptional profiles were determined by microarray analysis (Affymetrix ATH1 Genome Array) in Arabidopsis thaliana plants inoculated with the PGPR bacterial model Burkholderia phytofirmans PsJN Arabidopsis seeds were sown on square Petri dishes with half strength Murashige and Skoog medium (MS) 0.8% agar, and inoculated or not (control) with strain PsJN. To assess the effect of inactivated bacteria, an inoculum was heated at 95M-BM-0C for 20 min and then was used at the same dilution.Three biological replicates, consisting of ten plantlets of 13 days after sowing (DAS) each, for control and strain PsJN treatments, were used for global gene expression.
2013-05-31 | E-GEOD-47092 | biostudies-arrayexpress
Project description:Gene Networks Underlying the Early Regulation of Paraburkholderia Phytofirmans Psjn-induced Systemic Resistance in Arabidopsis
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Project description:Two potato cultivars, Russet Burbank and Bionta, were inoculated with three different endophytes containing different AHL types. The impact of the endophytes to the different cultivars was measured by gene expression analysis with a customized microarray B. phytofirmans type strain PsJN was originally isolated as a contaminant from surface-sterilized, Glomus vesculiferum-infected onion roots (Nowak et al., 1998), whereas strain P6 RG6-12 was isolated from the rhizosphere of a grassland in the Netherlands (Salles et al., 2006). This strain was selected based on its similarity to strain PsJN based on 16S rRNA gene homology, and similar phenotypic features. Both strains were generally cultivated on King's medium (King et al., 1954). For the mutant AHL to the strain B. phytofirmans PsJN a quorum quenching approach as described by Wopperer et al., 2006 was employed. Plasmid pMLBAD-aiiA, which contains aiiA, the Bacillus sp. 240B1 lactonase gene, was transferred to B. phytofirmans PsJN by triparental mating as described by de Lorenzo and Timmis (1994). 2 cultivars, 3 endophytes
2010-05-19 | E-GEOD-12862 | biostudies-arrayexpress
Project description:Phenolic compounds are implied in plant-microorganisms interaction and may be induced in response to plant growth-promoting rhizobacteria (PGPRs). Among PGPR, the beneficial bacterium Paraburkholderia phytofirmans PsJN was previously described to stimulate the growth of plants and to induce a better adaptation to both abiotic and biotic stresses. This study aimed to investigate the impact of PsJN on grapevine secondary metabolism. For this purpose, gene expression (qRT-PCR) and profiling of plant secondary metabolites (UHPLC-UV/DAD-MS QTOF) from both grapevine root and leaves were compared between non-bacterized and PsJN-bacterized grapevine plantlets. Our results showed that PsJN induced locally (roots) and systemically (leaves) an overexpression of PAL and STS and specifically in leaves the overexpression of all the genes implied in phenylpropanoid and flavonoid pathways. Moreover, the metabolomic approach revealed that relative amounts of 32 and 17 compounds in roots and leaves, respectively, were significantly modified by PsJN. Once identified to be accumulated in response to PsJN by the metabolomic approach, antifungal properties of purified molecules were validated in vitro for their antifungal effect on Botrytiscinerea spore germination. Taking together, our findings on the impact of PsJN on phenolic metabolism allowed us to identify a supplementary biocontrol mechanism developed by this PGPR to induce plant resistance against pathogens.
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