Love good rust but my heart now set on #oomycetes #downymildew and #phytophthora

@epponews.bsky.social @efsa-plants.bsky.social
@iufro.bsky.social @fao.org @ipsn-bgci.bsky.social
@biodiversa.eu @bspp.bsky.social @wwf.eu @greenpeace.eu

#PlantPathogens
#PlantBiosecurity
#Oomycetes

#NatureRestoration
#Forestry
#Horticulture
#PlantNurseries

Participation is free!

Working on #fungi or #oomycetes? 🧫
Boost your data mining skills with expert-led virtual training through the Fungal Pathogen Genomics Virtual Course by
@ConnectingSci

Don’t miss out: 🗓 Apply by 16 March 2026
coursesandconferences.wellcomeconnectingscience.org/event/fungal...

Participate in the #Fungal #Pathogen #Genomics Course (virtual) to get practical experience in data mining with online bioinformatics resources for #fungi and #oomycetes.
Apply now: coursesandconferences.wellcomeconnectingscience.org/event/fungal...
📅 Deadline: 16 March 2026

Headed to Asilomar for the 🧬 #Fungal #Genetics Conference?

ℹ️ Visit the #FungiDB help desk to learn about the bioinformatics tools & multi-omics data available for your research.

We’d love to hear about your projects & show you what’s new!

#Fungal26 #genomics #fungi #oomycetes #plantpathogens

Working on #fungi or #oomycetes? 🧫
Boost your data mining skills with expert-led virtual training through the Fungal Pathogen Genomics Virtual Course
Don’t miss out: 🗓 Apply by 16 March 2026
coursesandconferences.wellcomeconnectingscience.org/event/fungal...

A new study reveals the microbial biodiversity of dehesa soil A study reveals the underground interactions between fungi and oomycetes in twenty Andalusian dehesas, wooded pasturelands typical of the Iberian Peninsula, making it possible to identify the role of…

New study reveals the #microbial #biodiversity of #dehesa #soil ...

| #microbes | #fungi | #oomycetes | #pathogen | #laseca | #holmoak | Via @sciencex.bsky.social

Cell-surface pattern recognition receptors: Emerging players in plant–oomycete interactions Plants rely on a two-tiered innate immune system to detect and fend off microorganism infections. This system comprises cell-surface pattern recogniti…

Cell-surface pattern recognition receptors: Emerging players in plant–oomycete interactions

www.sciencedirect.com/science/arti...

#Oomycetes
#MPMI

#Oomycete
#Oomycetes

#Oomycetes
#MPMI
#PlantResistance

Tree dieback diseases caused by #Phytophthora (and other #Oomycetes) have impacts that extend beyond the host species, affecting for instance, insect communities: ecosystem functions at risk!
#CommunityComposition
#CommunityEcology

Work of Inês Gomes Marques:

Individual and combined effects of a simulated #heatwave and the emerging #Phytophthora ×multiformis on European #alder species.
doi.org/10.1016/j.fo...

#Alnus #RiparianForest #AbioticStress #BioticStress #Resilience
#Oomycetes

Join us today, at 16h00 in the Plenary - RED ROOM:
Thomas Jung (Mendel University in Brno) "Urgent need for EU regulation and nursery accreditation schemes to prevent spread of introduced #InvasivePlantPathogens via #RestorationActivities."

#EuroGard2025 #EuroGard10

#Oomycetes #PlantBiosecurity

Nova Scotia Christmas tree growers are working to stop the spread of a plant-damaging pathogen Over the last several years, a plant-killing pathogen has crept into a handful of Nova Scotia Christmas tree farms. Phytophthora, otherwise known as root Phytophthora, otherwise known as root rot,…

#Christmas #tree growers working to stop the spread of a plant-damaging #pathogen ...

| #Phytophthora | #roots | #oomycetes | #ChristmasTree | Via @cottagelifemag.bsky.social

Worldwide forest surveys reveal forty-three new species in Phyto...: Ingenta Connect

Worldwide forest surveys reveal forty-three new species in #Phytophthora major Clade 2 with fundamental implications for the evolution and #biogeography of the genus and global #PlantBiosecurity.

#Taxonomy
#Systematics
#Speciation
#Biodiversity
#Oomycetes

Preserving the Biologically Coherent Generic Concept of Phytophthora, “Plant Destroyer”: “We can see no reason why a Darwinian should adopt the concept of paraphyly” (Ernst Mayr and Walter Bock 2002): Phytopathology®: Vol 0, No 0 Phytophthora is a long-established, well-known, and globally important genus of plant pathogens. Phylogenetic evidence has shown that the biologically distinct, obligate biotrophic downy mildews evolved from Phytophthora at least twice. Because, cladistically, this renders Phytophthora “paraphyletic,” it has been proposed that Phytophthora evolutionary clades be split into multiple genera (Crous et al. 2021; Runge et al. 2011; Thines 2023, 2024). In this letter, we review arguments for the retention of the generic name Phytophthora with a broad circumscription made by Brasier et al. (2022) and by many delegates at an open workshop organized by The American Phytopathological Society. We present our well-considered responses to the genus splitting proposals, both in general terms and in terms of the specific proposals for new genera, alongside new information regarding the biological properties and mode of origin of the Phytophthora clades. We consider that the proposals are mostly non-rigorous and not supported by the scientific evidence. Further, given (i) the apparent lack of any distinguishing biological characteristics (synapomorphies) between the Phytophthora clades; (ii) the fundamental monophyly of Phytophthora in the original Haeckelian sense (Haeckel 1877); (iii) the fact that paraphyly is not a justification for taxonomic splitting; and (iv) the considerable likely damage to effective scientific communication and disease management from an unnecessary breakup of the genus, we report that workshop delegates voted unanimously in favor of preserving the current generic concept and for seeking endorsement of this view by a working group of the International Commission on the Taxonomy of Fungi. Copyright © 2025 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Just published, #Phytopathology, Letter to the Editor:
Preserving the Biologically Coherent Generic Concept of #Phytophthora, “Plant Destroyer”.

#DownyMildews
#Oomycetes
#Taxonomy
#Systematics
#Paraphyly
#Phylogeny
#Cladistics
#PlantBiosecurity
#ScientificCommunication
#PlantDiseaseManagement

Intraspecific Variation and Recent Loss of Ancient, Conserved Effector Genes in the Sudden Oak Death Pathogen Phytophthora ramorum | Molecular Plant-Microbe Interactions® Members of the Phytophthora genus are responsible for many important diseases in agricultural and natural ecosystems. Phytophthora ramorum causes devastating diseases of oak and tanoak stands in U.S. forests and larch in the United Kingdom. The four evolutionary lineages involved express different virulence phenotypes on plant hosts, and characterization of gene content is foundational to understanding the basis for these differences. Recent discovery of P. ramorum at its candidate center of origin in Asia provides a new opportunity for investigating the evolutionary history of the species. We assembled high-quality genome sequences of six P. ramorum isolates representing three lineages from Asia and three causing epidemics in Western U.S. forests. The six genomes were assembled into 13 putative chromosomes. Analysis of structural variation revealed multiple chromosome fusion and fission events. Analysis of putative virulence genes revealed variations in effector gene composition among the sequenced lineages. We further characterized their evolutionary history and inferred a contraction of crinkler-encoding genes in the subclade of Phytophthora containing P. ramorum. There were losses of multiple families and a near complete loss of paralogs in the largest core crinkler family in the ancestor of P. ramorum and sister species P. lateralis. Secreted glycoside hydrolase enzymes showed a similar degree of variation in abundance among genomes of P. ramorum lineages as that observed among several Phytophthora species. We found plasticity among genomes from multiple lineages in a Phytophthora species and provide insights into the evolutionary history of a class of anciently conserved effector genes. Copyright © 2025 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.

Intraspecific Variation and Recent Loss of Ancient, Conserved Effector Genes in the Sudden Oak Death Pathogen #Phytophthora ramorum | Molecular Plant-Microbe Interactions® apsjournals.apsnet.org/doi/10.1094/...

#Oomycetes

#Phytophthora
#Oomycetes

#IUFRO25CH Carmen Romeralo (#INIA-CSIC) on #dispersal of soil-borne #oomycetes: assessing #Phytophthora presence and #pathogenicity in National Parks

Modulation of key sterol-related genes of Nicotiana benthamiana by phosphite treatment during infection with Phytophthora cinnamomi Phytophthora cinnamomi is a globally destructive pathogen causing disease in over 5000 plant species. As sterol auxotrophs, Phytophthora species rely on host-derived phytosterols for reproduction, yet...

Aayushree Kharel (Deakin University, Australia):
Modulation of key sterol-related genes of Nicotiana benthamiana by phosphite treatment during infection with #Phytophthora cinnamomi.

doi.org/10.1071/FP24...

#Oomycetes
#PlantPathogenInteractions
#PlantImmunity

#Oomycetes #Oomycete
#Mycovirus #Oomyvirus

Annual conference of the Oomycete Molecular Genetic Network - 2025 - Sciencesconf.org

Exciting news! The Oomycete Molecular Genetics Network (OMGN) Meeting 2025 is now open for registration! #OMGN2025 it will be just before #MPMI2025 in Cologne #Oomycetes #PlantPathology #Phytophthora #Hyaloperonospora #Pythium #Plasmopara #Albugo #Bremia

🔗 omgn2025.sciencesconf.org/?lang=en

Preserving the Biologically Coherent Generic Concept of Phytophthora, ‘Plant Destroyer’ | Phytopathology® Phytophthora is a long-established, well known and globally important genus of plant pathogens. Phylogenetic evidence has shown that the biologically distinct, obligate biotrophic downy mildews evolve...

Just out, First Look version:
Preserving the Biologically Coherent Generic Concept of #Phytophthora, ‘Plant Destroyer’ | #PhytoPathology
apsjournals.apsnet.org/doi/10.1094/...

#Oomycetes #Taxonomy #Phylogeny #Cladistics #Paraphyly #PlantBiosecurity #ScientificCommunication #PlantDiseaseManagement

three ovate leaves with white felty down on the underside

a closeup of white down on the underside of a leaf, with tiny tree-like structures visible

New to Ireland: a downy mildew, Hyaloperonospora arabidopsidis (great name), on Arabidopsis thaliana. This one seems very underrecorded. A bunch of the records on GBIF are erroneous ones from marine eDNA studies in the middle of the Atlantic (lol). #FungiFriends #oomycetes

Survey and characterization of oomycete species associated with root rot in UK red raspberry (Rubus idaeus) Traditional isolation methods, morphological identification and oomycete-specific high-throughput sequencing of diseased roots are combined to give new insights into the oomycete species complex invo....

Just Published!🔈🌿 Delighted to share our latest study in raspberry #oomycetes from my PhD. Thanks to my co-authors at @niab-uk.bsky.social East Malling & HQ and @harperadamsuni.bsky.social for review and support.

doi.org/10.1111/ppa....

Peronospora conferta parasitising Cerastium holosteoides
#fungifriends #mycology #microscopy #oomycetes

Screenshot of a Bluesky post and a reply: ‪Screaming Pectoriloquy‬ ‪@caulimovirus.bsky.social‬ said: "If it looks like a fungus, spreads like a fungus, and deploys appresoria like a fungus, it could still be a species of oomycete which, while structurally and functionally resembling a fungus, remains phylogenetically distinct from fungi." ‪Jodie Burton‬ ‪@jodiemburton.bsky.social‬ replied: "Just what someone infested with Ophiocordyceps unilateralis would say."

I'm loving Bluesky

Thank you @caulimovirus.bsky.social and @jodiemburton.bsky.social for this 😆

#fungi #oomycetes #microbiology

Frontiers | The use of volatile organic compounds in preventing and managing invasive plant pests and pathogens

Latest paper from project PurPest: Plant pest prevention through technology-guided monitoring and site-specific control @purpest-eu.bsky.social

Biogenic #VOCs , Halyomorpha , Spodoptera , Helicoverpa, Bursaphelenchus, #Phytophthora , #Oomycetes
#PlantScience

doi.org/10.3389/fhor...

Multiple Phytophthora species associated with declining wild olive trees in Sardinia, Italy This study provides new insights into the role of multiple Phytophthora species associated with widespread and severe decline of wild olive trees in Sardinia (Italy).

Multiple #Phytophthora species associated with declining wild olive trees in Sardinia, Italy
#PlantDisease , #Oomycetes , #PlantPathology

doi.org/10.1111/ppa....

📜 Oomycete pathogen pectin acetylesterase targets host lipid transfer protein to reduce salicylic acid signaling

🧑‍🔬 Junjian Situ, Yu Song, Dinan Feng, Guanghui Kong, et al.

📔 Plant Physiology

🔗 academic.oup.com/plphys/advan...

#️⃣ (Feeds) #PlantScience #PlantImmunity #Phytohormones #Oomycetes