Just in time for IBWS2026, Nathalie Aoun pre-printed her study "Evolutionary and functional genomics reveal that #Ralstonia wilt pathogens actively deploy antimicrobial warfare while leveraging physiological adaptations during plant infection"
Multi-strain TnSeq! www.biorxiv.org/content/10.6...
FIGURE 4 Stem inoculation with Ralstonia solanacearum R3bv2 strain UW551 GFP-tet results in typical bacterial wilt symptoms. Left, a mock-inoculated healthy geranium plant cultivar ‘Galaxy Dark Red’. Right, a plant showing typical bacterial wilt symptoms 15 days after cut-stem inoculation with 106 CFU R. solanacearum UW551 GFP-tet.
Results from Jake A. Criscuolo et al. demonstrate that #Ralstonia solanacearum R3bv2 is eradicated from infected geranium tissue and growth media by cooler and shorter heat treatments than currently required: https://doi.org/10.1094/PHP-04-25-0121-RS
FIGURE 2 Effects of imbibing seeds with trehalose on bacterial wilt resistance and drought tolerance.
Farmers suffer large losses to bacterial wilt, a widespread crop disease caused by soilborne #Ralstonia species. José A. Sánchez-Gallego et al. evaluated trehalose, a biostimulant, to reduce bacterial wilt disease on tomato: https://doi.org/10.1094/PHP-04-25-0117-RS
We are editing a Special Issue on "Genomic Perspectives on the #Ecology and #Evolution of Bacterial #Plant #Pathogens and #Symbionts".
#Genomics #Pathogenicity #Virulence
#Acidovorax #Clavibacter #Curtobacterium #Erwinia #Pantoea #Pseudomonas #Ralstonia #Xanthomonas
www.mdpi.com/journal/micr...
🆕 version work @sylvain-vicente.bsky.social and collaborators #BIOSP #MathNum @inrae-dpt-spe.bsky.social. Re-evaluation of STAMP modelling, introducing time-resolution. Works also on Animal-bacterial infection models. #infection #Ralstonia #Pseudomonas #Klebsiella www.biorxiv.org/content/10.1...
The #Ralstonia solanacearum #effector RipAV targets plant U‐box proteins and induces proteasomal‐dependent degradation of BIK1
Research by Rufian, et al.
📖 nph.onlinelibrary.wiley.com/doi/10.1111/...
#PlantScience @type3lab.bsky.social
Do any organism-focused bacteriologists find COG categories to be useful?
It's not useless in #Ralstonia, but so many biologically exciting functions fall into bland categories.
Arguably, I operate with thresholds that are biased based on where #Ralstonia falls
www.nature.com/articles/415...
Re-reading an oldie but goodie. #Ralstonia was one of the first bacterial genomes to be sequenced. This paper is a great introduction to Ralstonia and their genomes. I am not sure I looked at the supplemental material before, but I like it.
(La Préfecture de la Sarthe alerte sur la présence de la bactérie #Ralstonia dans le Loir. L’arrosage des #potagers avec de l’eau prélevée dans le Loir est interdit dans 21 communes.)
actu.fr/pays-de-la-l...
The study, published in Horticulture Research, reveals how microbial cooperation under iron-limited conditions can suppress bacterial wilt in tomato.
#Ralstonia solanacearum #Pseudomonas spp.
Details: doi.org/10.1093/hr/uhae186
(1/4)
Phage host range matters for both fundamental and applied research, but how do we measure viral specialisation or generalism? We analyse diverse phages from Mauritius and Reunion infecting #Ralstonia spp. to test eco-evolutionary hypotheses and improve host-range analysis methods.
Didn't have the bandwidth to travel internationally for #2025ISMPMI, but I would have liked to share our biophysics story on Ralstonia's goopy biofilms.
Most biofilms are sticky, but #Ralstonia makes a unique exopolysaccharide that makes their biofilms highly mobile.
EPS-I gives Ralstonia wings!
Plants of Zingiber officinale with wilting symptoms. Source: EPPO (2025) Courtesy: Dennis Mernke (LTZ Augustenberg)
🌱 New EFSA Pest Report
📄 #Ralstonia #pseudosolanacearum
👉 doi.org/10.2903/sp.e...
EFSA’s scientific support for ranking EU candidate #PriorityPests.
📊 EFSA assessed 47 pests, focusing on:
✔️ Lag period
✔️ Spread rate
✔️ Impact on crops and the environment
#EFSA
#PlantHealth
#ScienceToPolicy
Des restrictions pour éviter que la bactérie Ralstonia solanacearum mette à mal la culture des patates et des solanacées
#patates #Ralstonia #bactérie #agriculture
end point phenotype of our training dataset for our #Arabidopsis #Ralstonia #DeepLearning model #Phenopsis #TPMP Looking good (looking dead !) @lipme-toulouse.bsky.social @inrae-france.bsky.social
Presentation by Sylvain Vicente, a very talented PhD student I have the honor to supervise @lipme-toulouse.bsky.social #RPB2025 about the population dynamics of the infection by #ralstonia in tomato.
Presentation by Nicolas Burkhardt @lipme-toulouse.bsky.social at #RPB2025 (p)ppGpp in #Ralstonia adaptation to plant xylem
Screenshot of a slide about Ralstonia diversity. Left shows a phylogenetic tree of the RSSC. Slide highlights how metadata on 9931 strains is being visualized into an interactive R shiny dashboard.
En route to Argentina / Uruguay for mostly fun and a smidge of work.
Excited that my colleague Jonathan Jacobs has arranged for me to speak with colleagues in Uruguay about #Ralstonia diversity.
I am developing a new slide deck to show off Vienna and Ben's excellent development of the RalstoniaDB
Excited to share our new (update v5) to our #Ralstonia Diversity Preprint, which explores the who, what, & where!
Ralstonia are pathogenic bacteria that threaten global food security by causing the plant version of a heart attack💔 ... wilt disease 🥀!
www.biorxiv.org/content/10.1... #microsky 🧪
Excited about the 🧪 scientific community moving over to BlueSky! 👋
Speaking of movement -- did you know that biofilms can migrate? #Ralstonia 🦠 biofilms have unique mechanical properties 🫠. Their exopolysaccharides give their biofilms wings 🪽
📜 Cell wall-mediated root development is targeted by a soil-borne bacterial pathogen to promote infection
🧑🔬 Gang Yu, Alberto P. Macho, et al.
📔 Cell Reports
🔗 www.sciencedirect.com/science/arti...
#️⃣ #PlantScience #PlantImmunity #Ralstonia #PlantCellWalls #Feronia
If anyone wants to place their #Ralstonia genomes in this tree, we maintain a public KBase narrative for this purpose: tinyurl.com/RSSC-phylo (requires free KBase account). No coding required!
To characterize the genetic diversity of Nagendra's isolates, our CURE sequenced genomes of 25 isolates.
Using KBase, we placed these news genomes in the phylogenetic context of all publicly available #Ralstonia.
Bold = new genomes
Grey = any genome from South Asia
#Ralstonia is a soil-borne pathogen that is difficult for growers to manage.
In order to identify cultivars with tolerance/resistance to Ralstonia in Southeast Asia, Nagendra selected six genetically diverse strains (all phylotype I) and quantified their aggression on a panel of 36 🍆🍅and 🫑lines
Screenshot of paper title and authors from https://apsjournals.apsnet.org/doi/10.1094/PHYTOFR-10-23-0136-R "Characterization of Ralstonia pseudosolanacearum diversity and screening tomato, pepper, and eggplant resistance to manage bacterial wilt in South Asia Nagendra Subedi, Tabitha Cowell, Matthew L. Cope-Arguello, Pierce Anderson Paul, Gilles Cellier, Hashem Bkayrat, Nicholas Bonagura, Agela Cadatal, Rachel Chen, Ariana Enriquez, Rama Parasar, Lisa Repetto, Aracely Hernandez Rivas, Mahnoor Shahbaz, Kaitlin White, Tiffany Lowe-Power, and Sally Ann Miller"
Photo of a Ralstonia strain from Bangladesh on CPG+TZC agar.
Our lab's first collaborative 🧪 paper with veggie pathologist Sally Miller's lab is live on the open-access APS journal PhytoFrontiers!
Through our cohort-based undergrad research experience (CURE), we sequenced genomes of #Ralstonia that Nagendra Subedi isolated during his PhD with Sally 🧬
(4) Interactive .html files to explore genetic organization and context of #Ralstonia toxin/antitoxin gene clusters e.g. lowepowerlab.ucdavis.edu/assets/clink...
(5) Plasmid maps
New tab on our lab webpage -- Datasets and other Science Resources lowepowerlab.ucdavis.edu/datasets
Check it out for:
(1) Links to recorded seminars on #Ralstonia
(2) Links to KBase narratives that are organized for exploring public #Ralstonia genomics/RNA-seq
(3) Links to our FigShare repo
...
@tlowepower.bsky.social @frimanscience.bsky.social any other #Ralstonia aficionados here on #bsky ?
Happy to welcome @frimanscience.bsky.social in #Toulouse #TULIP for a seminar on #Ralstonia and the phages controlling them in ecological settings. Lots of discussions to follow-up later on future avenues of collaboration
