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Novosphingobium sp. HR1a modifies the clover-root architecture through the alteration of the jasmonic acid levels in clover plants

ABSTRACT: Novosphingobium sp. HR1a modifies the clover-root architecture through the alteration of the jasmonic acid levels in clover plants

PROVIDER: PRJNA902342 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14267534_1.fastq.gz	Fastqsanger.gz
	SRR14267534_2.fastq.gz	Fastqsanger.gz
	SRR14267535_1.fastq.gz	Fastqsanger.gz
	SRR14267535_2.fastq.gz	Fastqsanger.gz

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Metabolic capacities of Novosphingobium sp. HR1a in the rhizosphere

Project description:Rhizoremediation, the biotechnology of the utilization of rhizospheric microorganisms associated with plant roots for the elimination of soil contaminants, is based on the ability of microorganisms to metabolize nutrients from plant root exudates, in order to survive the stressful conditions of the rhizosphere, and thereby, to co-metabolize or even mineralize toxic environmental contaminants. Novosphingobium sp. HR1a is a bacterial strain able to degrade a wide variety of polycyclic aromatic hydrocarbons (PAHs). We have demonstrated that this bacterium is able to grow in vegetated microcosms and to eliminate phenanthrene in the presence of clover faster than in non-vegetated systems, establishing a positive interaction with clover. We have studied the molecular basis of this interaction by phenomic, metabolomic and transcriptomic analyses, demonstrating that the positive interaction between clover and Novosphingobium sp. HR1a is a result of the bacterial utilization of different carbon and nitrogen sources (such as sugars, amino acids and organic acids) released during seedling development, and the capacity of exudates to induce the PAH degradation pathway. These results are pointing out to Novosphingobium sp. HR1a as a promising strain for the bioremediation of PAH-contaminated soils.

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Novosphingobium sp. HR1a modifies the clover-root architecture through the alteration of the jasmonic acid levels in clover plants

Project description:This SuperSeries is composed of the SubSeries listed below.

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PahT regulates carbon fluxes in Novosphingobium sp. HR1a and influence its survival in soil and rhizosphere.

Project description:In this work we describe the role of paht gene from Novosphingobium sp. HR1a, as a regulator that seems to be involved in the control over the utilization of carbon and sulfur sources mainly involved in the control of pyruvate production and in the acetyl-CoA biosynthesis and PEP recycling from pyruvate.

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Novosphingobium sp. HR1a

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LuxR402 of Novosphingobium sp. HR1a regulates the correct configuration of cell envelopes

Project description:In this work, we report that the knockout mutant in other of this luxR-like genes (named luxR402) in Novosphingobium sp. HR1a; floculated faster than the wild-type when cultures are in repose. Transcriptomic analysis allowed us to determine the LuxR402 regulon; we have identified that the carbohydrate assimilation pathway and TCA cycle are affected in the mutant. Accordingly, the mutant presented poorer growth than the wild-type when growing in different carbon sources. At stationary phase of growth the pili biosynthesis, trehalose utilization and capside-related proteins were affected in the mutant strain. Microscopy assays determined that the mutant strain cultures presented cells aggrupations and that the extracellular matrix is less abundant than in the wild-type cultures.

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Metabolic capacities of Novosphingobium sp. HR1a in the rhizosphere

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Transcription profiling of white clover plants following infection by white clover mosaic virus

Project description:White clover mosaic virus (WCMV) is a major pathogen of white clover (Trifolium repens L.), with significant effects on yield and persistence. Due to the absence of natural sources of WCMV resistance a transgenic strategy has been employed to produce plants constitutively expressing WCMV replicase gene derivatives, designed to inhibit the propagation of WCMV through an RNA silencing mechanism. A 12,000 feature oligonucleotide microarray has been used to identify global changes in host plant, in addition to virus genome-encoded gene expression associated with WCMV infection in non-transgenic and transgenic WCMV-resistant white clover. Pairwise comparison between the transcriptome of mock-inoculated non-transgenic and WCMV-inoculated transgenic plants provides clear evidence for substantial equivalence between these two genotype/treatments, and demonstrate the efficacy of the transgenic strategy. WCMV- inoculated non-transgenic plants exhibit elevated abundance of many virus-encoded, and host immune response-specific transcripts compared to the transgenic resistant plants or mock-inoculated non-transgenic plants. By contrast, relative to inoculated sensitive plants, the majority of significantly up-regulated genes in mock-inoculated non-transgenic plants or WCMV-inoculated transgenic plants are markers of healthy cellular function. These results, and the occurrence of levels of WCMV-encoded transcripts in inoculated transgenic plants equivalent to those in virus-free plants, confirm the validity of the transgenic RNA silencing approach.<br>

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LuxR402 of Novosphingobium sp. HR1a regulates the correct configuration of cell envelopes

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