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Inorganic phosphate solubilization by rhizosphere bacterium Paenibacillus sonchi genomovar Riograndensis SBR5: gene expression and physiological functions

ABSTRACT: Inorganic phosphate solubilization by rhizosphere bacterium Paenibacillus sonchi genomovar Riograndensis SBR5: gene expression and physiological functions

PROVIDER: PRJNA645831 | ENA |

REPOSITORIES: ENA

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Inorganic phosphate solubilization by rhizosphere bacterium Paenibacillus sonchi genomovar Riograndensis SBR5: gene expression and physiological functions

Project description:Due to the importance of phosphorus (P) in agriculture, crop inoculation with phosphate solubilizing bacteria (PSB) is a relevant subject of study. Paenibacillus sonchi genomovar Riograndensis SBR5 is a promising candidate for crop inoculation as it can fix nitrogen and excrete ammonium in a remarkably high rate. However, its trait of phosphate solubilization (PS) has not yet been studied in detail. Here, differential gene expression and functional analyses were performed in order to characterize PS in this bacterium. SBR5 was cultivated with two distinct P sources: NaH2PO4 as soluble phosphate source (SPi) and hydroxyapatite as insoluble phosphate source (IPi). Total RNA of SBR5 cultivated in those two conditions was isolated and sequenced and bacterial growth and product formation were monitored. In the IPi medium, the expression of 68 genes was upregulated, while 100 genes were downregulated. Among those, genes involved in carbon metabolism, including those coding for subunits of 2-oxoglutarate dehydrogenase were identified. Quantitation of organic acids showed that the production of tricarboxylic acid cycle-derived organic acids was reduced in IPi condition, while acetate and gluconate were overproduced. Increased concentrations of proline, trehalose, and glycine betaine revealed active osmoprotection during growth in IPi. The cultivation with hydroxyapatite also caused the reduction in the motility of SBR5 cells as a response to Pi depletion in the beginning of its growth. SBR5 was able to solubilize hydroxyapatite, which suggests that this organism is a promising PSB. Our findings are the initial step in the elucidation of the PS process in P. sonchi SBR5 and will be a valuable groundwork for further studies of this organism as a plant growth promoting rhizobacterium.

2021-01-13 | GSE154303 | GEO

Transcriptome analysis reveals that sporulation is used as an iron deficiency resistance mechanism in Paenibacillus riograndensis SBR5

Project description:Transcriptome analysis of Paenibacillus riograndensis SBR5. SBR5 strain was grown in sufficient iron media and limited iron media.

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Detailed transcriptome analysis of the plant growth promoting Paenibacillus riograndensis SBR5 using RNAseq technology

Project description:Background- The plant growth promoting rhizobacterium Paenibacillus riograndensis SBR5 is a promising candidate to serve as crop inoculant. Despite its potential regarding environmental and economic benefits, the species P. riograndensis is poorly characterized. Here, we performed for the first time a detailed transcriptome analysis of P. riograndensis SBR5 using RNAseq technology. Results- Sequence analysis of the library enriched in 5’-ends of the primary transcripts was used to identify 1,082 TSS belonging to novel transcripts and allowed us to determine a promoter consensus sequence and regulatory sequences in 5’ untranslated regions including riboswitches Conclusions- Our RNAseq analysis provides insight into the P. riograndensis SBR5 transcriptome at the systems level and will be a valuable basis for differential RNAseq analysis of this bacterium.

2017-10-25 | GSE98766 | GEO

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