#JJC2026 Salomé Soulé (@inrae-bioger.bsky.social) on functional characterization of genetic determinants involved in atypical #gene-for-gene interactions between oilseed rape and the #fungal pathogen #Leptosphaeria maculans

#Leptosphaeria maculans on dead stem-bases of garlic mustard (#Alliaria petiolata), here with perithecia, asci and ascospores (Les Clayes-sous-Bois, FR). Could be interesting "local" material for studying non-host resistance in oilseed rape, @soyer_jessica? 🤔

#Leptosphaeria acuta on dead stems of common nettle (#Urtica dioica), here with perithecia and asci (Les Clayes-sous-Bois, FR).

Nucleosome patterns in four plant pathogenic fungi with contrasted genome structures Corresponding author(s): Fudal, Isabelle (isabelle.fudal@inrae.fr); Ponts, Nadia (nadia.ponts@inrae.fr)

Our comparative analysis of nucleosome patterns in the plant pathogenic fungi #Fusarium graminearum, #Leptosphaeria maculans and #Botrytis cinerea is now published in @PeerComJournal

peercommunityjournal.org/articles/10.24…

Congrats @nacera_talbi for your PhD manuscript 'Deciphering the involvement of #effector families of the plant pathogenic fungus #Leptosphaeria maculans in oilseed rape infection' @INRAE_Bioger. We are so proud of you! A PhD funded by @UnivParisSaclay @DocSchoolPLant

Nucleosome patterns in four plant pathogenic fungi with contrasted genome structures Fungal pathogens represent a serious threat towards agriculture, health, and environment. Control of fungal diseases on crops necessitates a global understanding of fungal pathogenicity determinants and their expression during infection. Genomes of phytopathogenic fungi are often compartmentalized: the core genome contains housekeeping genes whereas the fast-evolving genome mainly contains transposable elements and species-specific genes. In this study, we analysed nucleosome landscapes of four phytopathogenic fungi with contrasted lifestyles and genome organisations to describe and compare nucleosome repartition patterns in relation with genome structure and gene expression level. We combined MNase-seq and RNA-seq analyses to concomitantly map nucleosome-rich and transcriptionally active regions during fungal growth in axenic culture; we developed the tool MSTS to analyse and visualise data obtained from MNase-seq experiments in combination with other genomic data and notably RNA-seq expression data. We observed different characteristics of nucleosome profiles between species, as well as between genomic regions within the same species. We further linked nucleosome repartition and gene expression. Our findings support that nucleosome positioning and occupancies are subjected to evolution, in relation with underlying genome sequence modifications. Understanding genomic organisation and its role in expression regulation is the next gear to understand complex cellular mechanisms and their evolution. ### Competing Interest Statement The authors have declared no competing interest.

Our comparative analysis of nucleosome patterns in the plant pathogenic fungi #Fusarium graminearum, #Leptosphaeria maculans and #Botrytis cinerea is available on BioRxiv

biorxiv.org/content/10.110…

Leaf spot on oilseed rape (Brassica napus) caused by #Leptosphaeria maculans (Phoma stem canker), Les Alluets-le-Roi, FR.

Leaf spot on oilseed rape (Brassica napus) caused by #Leptosphaeria maculans (Phoma stem canker), Les Alluets-le-Roi, FR.

Leaf spot on oilseed rape (Brassica napus) caused by #Leptosphaeria maculans (Phoma stem canker), Les Alluets-le-Roi, FR.

Jour 24 #PCA
Trouvé hier à Grignon, ascomycète(s) sur #fragon (#Ruscus aculeatus; A). Lésions "œil" sur cladodes (B-C) avec dessèchement total de certains rameaux (de l'année n-1) couverts de périthèces (vides; C-E). Même sp. ? #Phyllosticta ruscigena et/ou #Leptosphaeria rusci ?

Jour 24 #PCA
Trouvé hier à Grignon, ascomycète(s) sur #fragon (#Ruscus aculeatus; A). Lésions "œil" sur cladodes (B-C) avec dessèchement total de certains rameaux (de l'année n-1) couverts de périthèces (vides; C-E). Même sp. ? #Phyllosticta ruscigena et/ou #Leptosphaeria rusci ?

Routine matinale @INRAE_Bioger : mieux vaut avoir les 👀 en face des ⚫️ !
#Semis #Terrine #Colza
#Comptage #Microscope #Leptosphaeria

Routine matinale @INRAE_Bioger : mieux vaut avoir les 👀 en face des ⚫️ !
#Semis #Terrine #Colza
#Comptage #Microscope #Leptosphaeria

Fungal community profiles (incl. #Zymoseptoria tritici & #Leptosphaeria maculans) in agric. soils of a long-term field trial under different #tillage, #fertilization & crop #rotation conditions analyzed by h-t ITS-amplicon sequencing. For you, Lydie K 😜

journals.plos.org/plosone/articl…

#ReidChampi2017 Lydia Bousset @UMR_IGEPP @CSIROnews. Adaptation aux résistances & épidémiologie en métapopulations : leçons d'un dispositif exp sur #Leptosphaeria maculans pour définir des stratégies de gestion en "compliquant" la transmission de l'agent pathogène dans le paysage

Effect of isolation distance, tillage, cultivar & rotation in controlling #Leptosphaeria maculans on #oilseedrape

sciencedirect.com/science/articl…

Unusual evol. mechanisms to escape effector-tiggered-immunity AvrLm3/7 in #Leptosphaeria @MBalesdent Plissonneau @INRA_Bioger #sfpefpp2017

Today, 1st seminar @INRA_Bioger: "Insight on #host and #nonhost #adaptation in #Leptosphaeria maculans 'brassicae'", by Jessica soyer

Congratulations @MBalesdent for your #HDR / #habilitation @BIOGER! #Leptosphaeria maculans #Brassicae

Transmission of #Leptosphaeria maculans from a cropping season to the following one

onlinelibrary.wiley.com/doi/10.1111/aa…