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ABSTRACT: Differences of soil microbial community structures and functions in rhizospheres between waxy and non-waxy maize varieties

PROVIDER: PRJNA1212603 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR32068957_1.fastq.gz	Fastqsanger.gz
	SRR32068957_2.fastq.gz	Fastqsanger.gz
	SRR32068958_1.fastq.gz	Fastqsanger.gz
	SRR32068958_2.fastq.gz	Fastqsanger.gz
	SRR32068959_1.fastq.gz	Fastqsanger.gz

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Project description:Differences of soil microbial community structures and functions in rhizospheres between waxy and non-waxy maize varieties

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Project description:Pseudomonas fluorescens SBW25 cultures were inoculated into the rhizospheres of barley seedlings of the Chevallier and Tipple varieties growing in axenic cultures. Bacterial cells were collected from the rhizosphere one and five days after inculation and RNA extracted from them. Culture used for inoculation (but not exposed to the rhizospheres) were used as control. The aim of the experiment was to determine the changes in gene expression of P. fluorescens SBW25 upon exposure to barley rhizosphere and also to determine if the rhizospehres of the two varieties of Barley had different effects on gene expression of P. fluorescens SBW25.

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Genome sequencing of 22 Pseudomonas isolates from the rhizosphere of the barley variety Chevallier and 20 Psuedomonas isolates from the rhizosphere of the barley variety Tipple.

Project description:Chevallier is a heritage english landrace of barley first planted in 1820 while Tipple is modern cultivar of barley released in 2004. Pseudomonas strains were isolated from the rhizospheres of the two varieties and 22 and 20 of the most phylogenetically distinct ones were sequenced to find out the difference in genotypes preferentially selected in the rhizospheres of the two cultivars.

2023-06-15 | E-MTAB-12917 | biostudies-arrayexpress

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Project description:Russeting is a commercially important defect in apple (Malus x domestica) fruit production. Apple russeting is mainly characterized by the accumulation of suberin on the inner part of the cell wall. However, knowledge on the underlying genetic components triggering this trait remains sketchy. A bulk transcriptomic profiling was performed on the exocarps of three russeted and three waxy apple varieties using RNA sequencing. This experimental design was chosen to lower the specificities of each genotype. A qPCR validation was carried out on representative genes and additional contrasting varieties. Gene ontology enrichment revealed a repression of the lignin and cuticle biosynthesis genes in the russeted exocarps, concomitantly with an enhanced expression of suberin deposition, stress responsive, primary sensing, NAC and MYB-family transcription factors, and specific triterpene biosynthetic genes. Notably, a strong correlation (R2=0.976) between the expression of a MYB93-like transcription factor and key suberin biosynthetic genes was found. Our results suggest that russeting is induced by a decreased expression of the cuticle layer biosynthetic genes, leading to a stress response which not only affects suberin deposition, but also the entire structure of the cell wall. In addition, the large number of candidate genes highlighted in this study provides a solid platform for further functional investigations. In order to draw a consistent picture of the gene expression profiles specific to both russeted and waxy apples and at the same time to highlight and interpret the mechanism leading to the russeted phenotype, a bulk RNA-sequencing was performed on the exocarp of a group of three distinct fully-russeted apple varieties ('Patte de loup', 'Reinette Parmentier', 'St Edmund's Pippin') and a second one including 3 fully waxy varieties ('Gala', 'CRAW/Ma/AF42', and 'CRAW/Ma/AG94').

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