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Responses to hydric stress in the seed-borne necrotrophic fungus Alternaria brassicicola

ABSTRACT: Responses to hydric stress in the seed-borne necrotrophic fungus Alternaria brassicicola

PROVIDER: PRJNA551655 | ENA |

REPOSITORIES: ENA

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Responses to hydric stress in the seed-borne necrotrophic fungus Alternaria brassicicola

Project description:Responses to hydric stress in the seed-borne necrotrophic fungus Alternaria brassicicola

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Alternaria brassicicola infection regulates miRNAs in Arabidopsis thaliana [mRNA]

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.

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Alternaria brassicicola infection regulates miRNAs in Arabidopsis thaliana [sRNA]

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Project description:Transcriptional responses of Bdtf1-deletion mutant to the phytoalexin brassinin in the necrotrophic fungus Alternaria brassicicola

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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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Responses to Hydric Stress in the Seed-Borne Necrotrophic Fungus Alternaria brassicicola.

Project description:Alternaria brassicicola is a necrotrophic fungus causing black spot disease and is an economically important seed-borne pathogen of cultivated brassicas. Seed transmission is a crucial component of its parasitic cycle as it promotes long-term survival and dispersal. Recent studies, conducted with the Arabidopsis thaliana/A. brassicicola pathosystem, showed that the level of susceptibility of the fungus to water stress strongly influenced its seed transmission ability. In this study, we gained further insights into the mechanisms involved in the seed infection process by analyzing the transcriptomic and metabolomic responses of germinated spores of A. brassicicola exposed to water stress. Then, the repertoire of putative hydrophilins, a group of proteins that are assumed to be involved in cellular dehydration tolerance, was established in A. brassicicola based on the expression data and additional structural and biochemical criteria. Phenotyping of single deletion mutants deficient for fungal hydrophilin-like proteins showed that they were affected in their transmission to A. thaliana seeds, although their aggressiveness on host vegetative tissues remained intact.

| S-EPMC6730492 | biostudies-literature

Responses to hydric stress in the seed-borne necrotrophic fungus Alternaria brassicicola

Project description:In this study, we gained further insights into the mechanisms involved in the seed infection process by analysing the transcriptomic responses of germinated spores of A.brassicicola exposed to water stress.

2019-06-29 | GSE133507 | GEO

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