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Alternaria brassicicola infection regulates miRNAs in Arabidopsis thaliana

ABSTRACT: Alternaria brassicicola infection regulates miRNAs in Arabidopsis thaliana

PROVIDER: PRJNA326121 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR3680100.fastq.gz	Fastqsanger.gz
	SRR3680800.fastq.gz	Fastqsanger.gz
	SRR3680810.fastq.gz	Fastqsanger.gz
	SRR3680820.fastq.gz	Fastqsanger.gz
	SRR3680830.fastq.gz	Fastqsanger.gz

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Alternaria brassicicola infection regulates miRNAs in Arabidopsis thaliana [sRNA]

Project description:Plant microRNAs (miRNAs) have been implicated in plant immunity. These mainly focusing Arabidopsis thaliana threatened by (hemi-)biotrophic pathogens such as the bacterial pathogen Pseudomonas syringae. Here, we show that the Arabidopsis miRNA pathway is important for defense responses against the necrotrophic fungus Alternaria brassicicola. The miRNA pathway mutant ago1 exhibits an exaggerated response when treated with A. brassicicola, proposing that AGO1 is positive regulator. We found a subset of Arabidopsis miRNAs that quickly change their expression and their abundance in AGO1 complexes in plants exposed to A. brassicicola. The miRNAs responding to pathogen treatment are mainly targeting genes encoding metabolic enzymes, proteins involved protein degradation or transposons. In case of miR163, A. brassicicola infection results in increased levels of miRNA precursors and preferential accumulation of an unspliced form of pri-miR163, suggesting that A. brassicicola infection changes the transcriptional and post-regulation of pri-miRNAs. miR163 acts as a negative regulator of plant defense because mir163 mutants are more resistant when treated with A. brassicicola. Taken together, our results reveal the existence of positively and negatively acting Arabidopsis miRNA modulating the defense responses against A. brassicicola and highlight the importance of host miRNAs in the interaction between plants and necrotrophic pathogens.

2019-06-17 | GSE83487 | GEO

Alternaria brassicicola infection regulates miRNAs in Arabidopsis thaliana [mRNA]

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Phosphoproteome profiles of the phytopathogenic fungi Alternaria brassicicola and Botrytis cinerea

Project description:This study describes the gel-free phosphoproteomic analysis the phytopathogenic fungi Alternaria brassicicola and Botrytis cinerea grown in vitro under non-limiting conditions.

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Brassica oleracea-Alternaria brassicicola interaction during the early stages of leaf infection

Project description:Gene expression changes during the initial stages of black spot disease caused by Alternaria brassicicola on Brassica oleracea (Brassica oleracea var. capitata f. alba, white cabbage) leaves were investigated with Arabidopsis thaliana oligonucleotide microarrays. Transcriptional profiling of infected B. oleracea leaves revealed that photosynthesis was the most negatively regulated biological process. The negative regulation of 6 photosynthesis-related genes, mainly the genes involved in the photosynthesis light reaction and Calvin cycle, was observed as early as 12 hours post infection (hpi). It progressed through 48-hpi stage, when 44 down-regulated photosynthesis-related genes were detected. The analyses of infected leaves at microscopic, ultrastructural and physiological levels supported the microarray-based observations and indicated that the photosynthetic processes are suppressed in B. oleracea as a result of the fungal infection.

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Alternaria brassicicola

Project description:Fungal-Specific Transcription Factor AbPf2 Activates Pathogenicity in Alternaria brassicicola

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Responses of Arabidopsis immune signaling mutants to Alternaria brassicicola infection

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Dual-transcritome analysis of germinating Arabidopsis seeds in response to necrotrophic fungus Alternaria brassicicola

Project description:We analyzed dual-transcriptome changes in germinating Arabidopsis seeds at three development stages (3, 6 and 10 days after sowing) with or without Alternaria brassicicola. Differentailly expressed genes were identified from both seed and fungus.

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Responses of Arabidopsis immune signaling mutants to Alternaria brassicicola infection

Project description:A major part of plant immune response is mediated by signaling pathways controlled by three hormnes, jasmonate, ethylene, and salicylate. The involvement of each of these hormone signaling pathways in Arabidopsis thaliana was investigated in response to infection of a necrotrophic fungal pathogen, A. brassicicola. Arabideopsis mutants deficient in these hormone signaling pathways were compared to wild type. Expression profiles were obtained from leaves of wild-type (Col-0), dde2-2, ein2-1, and sid2-2 plants at 9 and 24 hours after A. brassicicola inoculation. In addition, expression profiles were obtained from wild-type at 9 and 24 hours after mock inoculation. The replicates were made from three independent experiments (i.e., biological replicates). Please note that 'Col-0 at 24 hpi with A. brassicicola, biological rep 3' was excluded from data processing because the data did not pass a QC based on affyPML of Bioconducter.

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