Excited to share the publication of our latest ‘Commentary’ article : "Metabolic Detour, Symbiotic Delay: Insights from Sinorhizobium meliloti Suppressor Mutants" https://t.co/Q2psiX4jvZ @slcuplants @MPMIjournal

#2025ISMPMI check out our finest selection of posters on symbiosis, effectors, Marchantia and barley. @IamJawaharSingh @AlbinTeulet @kos_darius @Rochirmayi

Thrilled to share our latest @biorxivpreprint! This work started during my PhD and was finished together with @JMadhuprakash. We found a Phytophthora infestans L-shaped effector that bridges a host TOL protein to activated NLRs to suppress immunity! https://t.co/1o24A1Rp2s 1/15

Congrats to @_chetan_pandey_ @slcuplants for his Best Poster Award. Very proud of you!

Congratulations to @_chetan_pandey_ for winning the best poster at Botanicon 2025!

Alex is talking about his phosphoinositides @AlexWGuyon

8/ TL;DR: ✅ Phosphoinositide signatures at plant-microbe interfaces are dynamic ✅ Mutualist colonisation reshapes pathogen interface identity ✅ This shift correlates with enhanced resistance, suggesting membrane identity may influence infection outcome.

8/ Beyond just documenting these dynamics, our work asks: 🌱Can we rethink host-pathogen “specialised” membranes as dynamic, context-dependent landscapes? 🔬Are immune evasion strategies vulnerable in complex microbial environments?

7/ So what's going on? We propose that PI4P exclusion from haustoria is a pathogen-driven strategy, likely involving secreted effectors. But during AM symbiosis, trafficking to arbuscules may override this, forcing the pathogen into an interface it didn’t design.

6/ Even more: co-colonisation enhances resistance to P. palmivora. Mutualist presence seems to rewire the pathogen interface.

5/ But here's the twist, during co-colonisation, haustoria begin recruiting PI4P That’s a fundamental shift in membrane identity. And yes - we observed single plant cells simultaneously harbouring both an arbuscule and a haustorium!

4/ Watch it in action! Here’s PI(4,5)P₂ (via biosensor P24Y) tracking fungal growth during AM symbiosis. Captured using @JenMcgaley‘s AMSlide.

3/ In single infections: •PI(4,5)P₂ is tip-enriched in arbuscules but uniform around haustoria. Each interaction has a distinct membrane fingerprint. •PI4P is present at the periarbuscular membrane of the mutualist but absent from haustoria of the pathogen.

2/ Phosphoinositides (PIPs) are key lipids that define membrane identity. We visualised PI(4,5)P₂ and PI4P biosensors from @YvonJaillais in Nicotiana benthamiana during root colonisation by a mutualist AM fungus - F. mosseae and a pathogen - P. palmivora. https://t.co/K408FjJk1Z

1/🚨 New preprint alert! Can mutualists and pathogens co-colonise the same living plant cell and what does that do to the plant membranes that surround these microbes?

Intracellular pathogens can form extensive hyphal structures. Here, the pathogen Phytophthora palmivora (magenta) produces invasive hyphae in a living epidermal cell of a Nicotiana root. The plant surrounds the invader by an 'extra-invasive hyphal membrane' (yellow)📸@AlexWGuyon

We’re thrilled to announce the speakers for our IS-MPMI 2025 satellite meeting: "Building Careers in MPMI through Effective Mentoring" 📍 13 July 2025 • Cologne, Germany 🌟 Sebastian Schornack 🌟 Anne Pfeiffer 🌟 Rosa Lozano-Durán 🌟 Kenichi Tsuda 📢 Join us for inspiring talks

New! An ancient plant symbiotic fungus with distinct features identified through advanced fluorescence & Raman imaging @CStrulluDerrien,R.Wightman,L.P.McDonnell,G.Evans,F.Fercoq,@PaulKenrick2& A. Ferrari @slcuplants @NHM_London @Le_Museum @GrapheneUCam https://t.co/5FmQcerLf3

Impossible dream: Self- fertilising cereal crops? @cpm_magazine

How do fungi explore a root system over time? Spatial and temporal tracking of the Nicotiana root symbiosis with arbuscular mycorrhiza fungi using MycoRed. Videos and images and optimised Rhizotrons by @Nick_GarciaH Science behind this: https://t.co/pAdKtZSz8n