11 research outputs found
Responses to hydric stress in the seed-borne necrotrophic fungus Alternaria brassicicola
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
Turnip yellow mosaic virus RNA-replicase contains host and virus encoded subunits
International audienc
Characterization of two plasmids from Spiroplasma citri strains MH and M4 : their distribution among other spiroplasma strains or species
International audienc
Characterization of two cryptic plasmids from Spiroplasma citri and occurrence of their DNA sequences among various spiroplasmas
International audienc
Spiroplasmas and the transfer of genetic material by transformation and transfection
International audienc
Expression of the Spiroplasma citri spiralin gene in Escherichia coli. Use of the recombinant plasmid carrying the gene as a molecular probe
International audienc
Variation and temporal patterns in the composition of the surface ichthyoplankton in the southern Bay of Biscay (W. Atlantic)
International audienc
Detecting the impact of oceano-climatic changes on marine ecosystems using a multivariate index : the case of the Bay of Biscay (North Atlantic-European Ocean)
International audienc
Spiroplasma melliferum, a new species from the honeybee (Apis mellifera)
International audienc