Alex Martiniere
@alexmartiniere.bsky.social
Plant cell biologist, PI @ IPSIM, Montpellier France
Happy to share our latest work showing that fungal cell fusion not only requires local cell wall digestion but also inhibition of cell wall repair! PAK-family kinases promote cell fusion irreversibility by preventing cell-wall repair doi.org/10.1016/j.cu... Led by @juliacoronasserna.bsky.social
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Jitu Mayor Lab@jitumayorlab.bsky.social · 4w agoOur latest study about how stratified myosin motors at the plasma membrane drive distinct nanoscale clusters that organize into segregated mesoscale active emulsions is out in Science Advances! Read on to find out more| Science Advances www.science.org/doi/10.1126/...
Huge congratulations to all three Nobel Laureates, and especially Peter Hegemann! 👏 His seminal work on the green alga Chlamydomonas 🦠 laid the foundation for optogenetics. Thank you for putting Chlamy in the spotlight! ✨ Proof that groundbreaking discoveries don't always come from animal models! 🔬
Nobel Prize@nobelprize.org · last wk.BREAKING NEWS The 2026 Nobel Prize in Physiology or Medicine has been awarded to Karl Deisseroth, Peter Hegemann and Georg Nagel “for their discoveries concerning light-gated ion channels and optogenetics.”
An Aphid Protein Interferes with Plant endomembrane Trafficking Machinery to Promote Aphid Survival and Plant Growth https://www.biorxiv.org/content/10.64898/2026.10.02.756256v1
You Wu and David J. Reiner @tamu.bsky.social provide in vivo evidence for the long-proposed role of the Ras effector Ral, a small #GTPase, in regulating the metazoan #exocyst complex. rupress.org/jcb/article/... #Celegans #Development #Trafficking
Nice summary of our recent preprint on the lipid-based innovations that facilitated plant terrestrialization ! Comments are more than welcome!
preLights@prelights.bsky.social · 2w agoDid one gene family help plants colonise land? Zamar et al. @pierremarcdelaux.bsky.social show how a land-plant-specific enzyme family, p-GPATs, is involved in two different processes: cuticle formation & arbuscular mycorrhizal symbiosis #preLight by Naveen⬇️ prelights.biologists.com/highlights/a...
Study today in @natcellbio.nature.com by @mathilda95.bsky.social @nadlerlab.bsky.social @mpi-cbg.de, Honigmann group @biotec-tud.bsky.social & @carldmodes.bsky.social reveals that clathrin-mediated endocytosis sorts proteins but not lipids. Lipids use different routes. www.mpi-cbg.de/news-outreac...
UPDATE!: I am absolutely stoked that the second paper of my PhD is now out in @natcellbio.nature.com :D. We combined lipid imaging, STED microscopy, and mathematical modelling in a super cool team effort to quantify lipid partitioning inside clathrin-coated pits. www.nature.com/articles/s41....
Quantification of lipid sorting during clathrin-mediated endocytosis - Nature Cell Biology
Lennartz et al. evaluate lipid enrichment in clathrin-coated pits and observe that the differential lipid partitioning into clathrin-coated pits is largely driven by the lipid asymmetry of the plasma ...
nature.com
Synthetic FLS2 receptor oligomer boosts plant innate immunity | Science Advances www.science.org/doi/10.1126/...
Synthetic FLS2 receptor oligomer boosts plant innate immunity
The gradual assembly and oligomerization of cell surface receptors are critical for regulating immune activation and turnover. Yet, how dynamic, spatiotemporally regulated assembly enables rapid and s...
science.org
And if this looks like fun research that you would like to be involved in, @mc-caillaud.bsky.social has 2 postdoc positions. Applications close: 1 November 2026
Sainsbury Laboratory Cambridge University (SLCU)@slcuplants.bsky.social · 3w ago@mc-caillaud.bsky.social's talk at #SLS26 suggests actin-mediated regulation allows flexible implementation of a shared core strategy, favouring division perpendicular to the growth axis and symmetric partitioning, while avoiding lateral wall anchoring. www.ens-lyon.fr/RDP/signalis...
Wonderful science at the @embo.org Plant Calcium Signaling in Primosten, Croatia🌿 @sebmong.bsky.social @lbm-bordeaux.bsky.social
Applications are now open for early-career researchers to apply for a funded place at our Workshop on Membrane Function: Insights from Cellular Diversity and Evolution, organised by Snezhana Oliferenko @alebenoit.bsky.social & Cunqi Ye. Find out more and apply www.biologists.com/workshops/ju...
New Preprint! We use #AFM and CarboTag-based #FLIM to describe rapid cell wall mechanisms of Phytosulfokines & Brassinosteroids and investigate how these processes are initiated on the nanoscale by using #sptPALM! PS: This is also the main story of my PhD project😊✌🏻 www.biorxiv.org/content/10.6...
Distinct nanoscale dynamics of growth receptor complexes link hormone perception to rapid cell wall remodeling
Cell elongation is a fundamental process allowing plants to change size and shape, a process governed by several growth promoting hormones. While hormones such as brassinosteroids (BRs) and phytosulfo...
biorxiv.org
The crowd ! #INTERFACE2026 First edition of the french "plant membrane interface" meeting here at @ensdelyon.bsky.social hosted by @rdplab.bsky.social sponsored by @cnrsbiologie.bsky.social
Check out our preprint on the structural mechanisms of how LEM2 and ESCRTs seal the nuclear envelope. Awesome collaboration with @karenpalacior.bsky.social who brought my structures to life 💃🔬❄️🌀 @hummerlab.bsky.social www.biorxiv.org/content/10.6...
Decoding dialog: the auxin–calcium signaling crosstalk in plants #plantscience
Decoding dialog: the auxin–calcium signaling crosstalk in plants
Auxin and calcium (Ca2+) are central plant signals that coordinate growth, development, and responses to environmental cues. Typically studied as largely parallel pathways, they are now increasingly recognized as interconnected networks whose activities converge at multiple regulatory levels. Recent advances in live imaging, biosensors, optogenetics, and structural approaches have revealed that auxin can rapidly trigger Ca2+ influx from the apoplast via TRANSPORT INHIBITOR RESPONSE1 (TIR1)/AUXIN-SIGNALING F-BOX (AFB)-dependent signaling mechanisms and Ca2+ channels, presumably involving cyclic nucleotides produced by TIR1/AFB auxin receptors. Conversely, Ca2+ signals arising from mechanosensing, wounding, and environmental stress can modulate auxin transport, signaling, and transcriptional outputs. Together, these discoveries highlight a dynamic, reciprocal signaling axis where Ca2+ acts both downstream and upstream of auxin to shape growth, development, tropisms, and regeneration.
dlvr.it
An advanced toolset to manipulate and monitor subcellular phosphatidylinositol 3,5-bisphosphate. From Joshua Pemberton, @jburkevic.bsky.social, Tamas Balla and colleagues: rupress.org/jcb/article/... 📕 From our #Lipid and #Membrane collection: rupress.org/jcb/collecti... #EMBOLipidCode
Already kicking off the INTERFACE Workshop 2026 in Lyon! Nice first day interacting with all the participants and learning more about grant writing! 🚀 #PlantBiology #Science
Please have a look at our review on a very interesting and underappreciated group of proteins... Getting a grip on StAR-related lipid-transfer (START) domain proteins in bacteria academic.oup.com/femsre/artic...
Getting a grip on StAR-related lipid-transfer (START) domain proteins in bacteria
Bacterial START domain proteins have a conserved helix-grip fold, but diverge from mammalian lipid transporters by utilizing a more versatile array of proc
academic.oup.com
A triple fluorescent marker for live imaging of plant cell morphogenesis https://www.biorxiv.org/content/10.64898/2026.08.20.745988v1
Out now in @currentbiology.bsky.social the improved version of our paper! I am very proud of this work with @ckirchhelle.bsky.social, @nathan-german.bsky.social, Annamaria Kiss, @moritznowack.bsky.social and others! www.sciencedirect.com/science/arti...
Plant cells at the organ surface use mechanical cues to activate a specific growth-control program
During morphogenesis of multicellular organs, cells in distinct positions need to meet specific functional requirements to form the appropriate tissue…
sciencedirect.com
Great start to ENPER 2026, discussing science with colleagues in Sofia, Bulgaria 🇧🇬. Happy to have had the opportunity to present our latest findings on S-acylation, oligomerization, and nanodomain organization!
Extracellular water withdrawal drives disease resistance in the phyllosphere https://www.biorxiv.org/content/10.64898/2026.08.27.747301v1
ICYMI: New Online! Mechanisms and balanced regulation of plant immunity
Mechanisms and balanced regulation of plant immunity
Nature Reviews Molecular Cell Biology, Published online: 27 August 2026; doi:10.1038/s41580-026-01009-4This Review discusses recent insights into the mechanisms of immune signalling in plants and their regulation to achieve effective defence against pathogens while preserving plant fitness. It also explores the interplay between the immune system and environmental stresses, and strategies for engineering optimal disease-resistant plants.
dlvr.it
Thanks Jenny for hosting us in beautiful Sofia, it was a such a great ENPER meeting 😍😍, see you in Bordeaux, it is a real pleasure to organize the next ENPER.
IN BRIEF: A dynamic phospho-switch that times diurnal stomatal movements in Arabidopsis (Xinyu Zhang) doi.org/10.1093/plce... #PlantScience @aspbofficial
A dynamic phospho-switch that times diurnal stomatal movements in Arabidopsis
Plants, like other organisms, live according to a daily rhythm. Stomatal movements are crucial for plant photosynthesis and water use efficiency (WUE). Lig
doi.org
New OA Article: "A STRUBBELIG–NHL3 cell surface receptor complex mediates the response to cellulose deficiency in Arabidopsis" rdcu.be/fBLtO Signalling by SUB in cell wall integrity involves two functionally distinct cell surface complexes. #PlantScience
