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Arabidopsis phyllosphere bacteria

ABSTRACT: Genome sequencing of Arabidopsis phyllosphere isolates

PROVIDER: PRJEB47672 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	ERR6805630_1.fastq.gz	Fastqsanger.gz
	ERR6805630_2.fastq.gz	Fastqsanger.gz
	ERR6805631_1.fastq.gz	Fastqsanger.gz
	ERR6805631_2.fastq.gz	Fastqsanger.gz

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Transcriptome analysis of Arthrobacter in the phyllosphere

2013-06-21 | GSE48198 | GEO

Transcriptome analysis of Arthrobacter in the phyllosphere

Project description:Arthrobacter chlorophenolicus A6 is a 4-chlorophenol degrading soil bacterium with high phyllosphere colonization capacity. Till now the genetic basis for the phyllosphere competency of Arthrobacter or other pollutant-degrading bacteria is uncertain. We investigated global gene expression profile of A. chlorophenolicus grown in the phyllosphere of common bean (Phaseolus vulgaris) compared to growth on agar surfaces. We designed transcriptome arrays and investigated which genes had different transcript levels in the phyllosphere of common bean (Phaseolus vulgaris) as compared to agar surfaces. Since water availability is considered an important factor in phyllosphere survival and activity, we included both high and low relative humidity treatments for the phyllosphere-grown cells. In addition, we determined the expression profile under pollutant exposure by the inclusion of two agar surface treatments, i.e. with and without 4-chlorophenol.

2013-06-21 | E-GEOD-48198 | biostudies-arrayexpress

Leaf transcriptomes of Arabidopsis thaliana colonized by representative phyllosphere commensals alone and in combination with the pathogen Pseudomonas syringae DC3000

Project description:Plants are colonized by a variety of microorganisms, the plant microbiota. In the phyllosphere, the above-ground parts of plants, bacteria are the most abundant inhabitants. Most of these microorganisms are not pathogenic and the plant responses to commensals or to pathogen infection in the presence of commensals are not well understood. We report the Arabidopsis leaf transcriptome after 3 to 4 weeks of colonization by Methylobacterium extorquens PA1 and Sphingomonas melonis Fr1, representatives of two abundant genera in the phyllosphere, compared to axenic plants. In addition, we also sequenced the transcriptome of Arabidopsis 2 and 7 days after spray-infection with a low dose of P. syringae DC3000 and in combination with the commensals.

2016-06-05 | E-MTAB-4683 | biostudies-arrayexpress

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Project description:Exploring the beneficial properties of bacteria for applications on the phyllosphere

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Transcriptome of Moesziomyces albugensis in response to different biotic factors (A. laibachii & SynCom) on A. thaliana leaves

Project description:As the phyllosphere is a resource-limited niche, microbes have evolved different survival strategies by collaborating or competing with other organisms. This leads to the establishment of network structures which are stabilised by so-called microbial hub organisms. An already identified hub in the Arabidopsis thaliana phyllosphere is the oomycete pathogen Albugo laibachii. From wild Arabidopsis plants with white rust symptoms we isolated the basidiomycete yeast Moesziomyces albugensis, which is closely related to plant pathogenic smut fungi. It suppresses the infection of A. laibachii in lab experiments and inhibits growth of several bacterial phyllosphere members. The transcriptomic response of M. albugensis to presence of A. laibachii and bacterial SynCom members was investigated by using RNA sequencing. Interestingly, several genes encoding secretory proteins, mostly glycoside hydrolases and peptidases, are particularly induced upon interaction with A. laibachii.

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Use of rare-earth elements in the phyllosphere colonizer Methylobacterium extorquens PA1

Project description:Until recently, rare-earth elements (REEs) had been thought to be biologically inactive. This view changed with the discovery of the methanol dehydrogenase (Mdh) XoxF that strictly relies on REEs for its activity. Some methylotrophs only contain xoxF, while others, including the model phyllosphere colonizer Methylobacterium extorquens PA1, harbor this gene in addition to mxaFI encoding a Ca2+-dependent enzyme. Here we found that REEs induce the expression of xoxF in M. extorquens PA1, while repressing mxaFI, suggesting that XoxF is the preferred Mdh. Using reporter assays and a suppressor screen, we found that La3+ is sensed both in a XoxF-dependent and independent manner. Furthermore, we investigated the role of REEs during Arabidopsis thaliana colonization. Element analysis of the phyllosphere revealed the presence of several REEs at concentrations up to 10 μg per g dry weight. Complementary proteome analyses of M. extorquens PA1 revealed XoxF as a top induced protein in planta and resulted in the identification of a core set of La3+-regulated proteins under defined artificial media conditions. Among these, we identified a potential REE-binding protein that is encoded next to a gene for a TonB-dependent transporter. The latter was essential for REE-dependent growth on methanol indicating chelator-assisted uptake of REEs.

2019-01-21 | PXD011842 | Pride

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