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Alex Martiniere

@alexmartiniere.bsky.social
145 followers 135 following 10 posts

Plant cell biologist, PI @ IPSIM, Montpellier France

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Reposted by Alex Martiniere
Marie-Cécile Caillaud @mc-caillaud.bsky.social · 05/10/2026
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Reposted by Alex Martiniere
Florent Waltz @florentwaltz.bsky.social · 05/10/2026
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! 🔬
Chlamydomonas cells
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bioRxiv Plant Bio @biorxiv-plants.bsky.social · 06/10/2026
An Aphid Protein Interferes with Plant endomembrane Trafficking Machinery to Promote Aphid Survival and Plant Growth www.biorxiv.org/content/10.64898/20…
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Journal of Cell Biology @jcb.org · 06/10/2026
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
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PM Delaux @pierremarcdelaux.bsky.social · 30/09/2026
Nice summary of our recent preprint on the lipid-based innovations that facilitated plant terrestrialization ! Comments are more than welcome!
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Max Planck Institute of Molecular Cell Biology and Genetics @mpi-cbg.de · 29/09/2026
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...
STED image
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Mathilda Lennartz @mathilda95.bsky.social · 30/09/2026
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....
nature.com
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 ...
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Greg Vert @plantubiquitin.bsky.social · 27/09/2026
Synthetic FLS2 receptor oligomer boosts plant innate immunity | Science Advances www.science.org/doi/10.1126/...
science.org
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...
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Sainsbury Laboratory Cambridge University (SLCU) @slcuplants.bsky.social · 22/09/2026
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
Promotional slide with images from plant science research in Marie-Cécile Caillaud's research team. Two postdoc positions in Marie-Cécile Caillaud's research team at 
RDP - ENS Lyon. Applications close 1 November 2026. Starting date Jan 2027 onwards.
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Marija Smokvarska @smokvarska-marija.bsky.social · 22/09/2026
Wonderful science at the @embo.org Plant Calcium Signaling in Primosten, Croatia🌿 @sebmong.bsky.social @lbm-bordeaux.bsky.social
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Yohann Boutté @yohannboutte.bsky.social · 21/09/2026
www.nature.com/articles/s41...
nature.com
ROP meets RAB at crossroads - Nature Plants
Plants express diverse small GTP-binding proteins including Ras-associated binding (RAB) proteins that direct membrane trafficking and Rho-of-plant (ROP) proteins that mostly regulate cytoskeletal org...
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The Company of Biologists @biologists.bsky.social · 21/09/2026
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...
Membrane Function: Insights from Cellular Diversity and Evolution
Date: 13 – 16 June 2027

Location: Buxted Park, East Sussex, UK
Organisers: Snezhana Oliferenko and Cunqi Ye
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Luiselotte Rausch @luiselotterausch.bsky.social · 11/09/2026
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...
biorxiv.org
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...
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Marie-Cécile Caillaud @mc-caillaud.bsky.social · 09/09/2026
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
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Marija Smokvarska @smokvarska-marija.bsky.social · 08/09/2026
Our amazing Tati describes oscillating plasmodesmata at the INTERFACE meeting ENS Lyon. #pdpower
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mareikejordan.bsky.social @mareikejordan.bsky.social · 04/09/2026
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...
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Trends in Plant Science @cp-trendsplantsci.bsky.social · 04/09/2026
Decoding dialog: the auxin–calcium signaling crosstalk in plants #plantscience
dlvr.it
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.
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Journal of Cell Biology @jcb.org · 06/09/2026
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
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Jesús Amo @jesusamo95.bsky.social · 02/09/2026
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
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Wilbert Bitter @wilbertbitter.bsky.social · 02/09/2026
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...
academic.oup.com
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
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bioRxiv Plant Bio @biorxiv-plants.bsky.social · 22/08/2026
A triple fluorescent marker for live imaging of plant cell morphogenesis www.biorxiv.org/content/10.64898/20…
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Zoe Nemec Venza @zoenv.bsky.social · 29/07/2026
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...
sciencedirect.com
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…
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Jesús Amo @jesusamo95.bsky.social · 26/08/2026
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!
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bioRxiv Plant Bio @biorxiv-plants.bsky.social · 28/08/2026
Extracellular water withdrawal drives disease resistance in the phyllosphere www.biorxiv.org/content/10.64898/20…
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Nature Reviews Molecular Cell Biology @natrevmcb.nature.com · 30/08/2026
ICYMI: New Online! Mechanisms and balanced regulation of plant immunity
dlvr.it
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.
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Yohann Boutté @yohannboutte.bsky.social · 29/08/2026
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.
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Omar Hdedeh @omarhdedeh.bsky.social · 26/08/2026
Here we go ! #ENPER2026 #sofia_Bulgaria
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The Plant Cell @theplantcell.bsky.social · 24/08/2026
IN BRIEF: A dynamic phospho-switch that times diurnal stomatal movements in Arabidopsis (Xinyu Zhang) doi.org/10.1093/plce... #PlantScience @aspbofficial
doi.org
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
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Nature Plants @natplants.nature.com · 24/08/2026
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
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Alex Martiniere @alexmartiniere.bsky.social · 20/08/2026
www.insb.cnrs.fr/fr/cnrsinfo/...
insb.cnrs.fr
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Dolf Weijers @dolfweijers.bsky.social · 18/08/2026
It took some time, but we are thrilled to present the first major outcome of our @erc.europa.eu ERC DIRNDL AdG project: Evgeniya Pukhovaya @epukh.bsky.social and others in our team describe the discovery of a mechanism for polar protein targeting in plants (1/13) www.biorxiv.org/content/10.6...
biorxiv.org
Systematic proteomics identifies a conserved mechanism for polar targeting of plant cortical proteins
Multicellular development is tightly coupled to the polarization of individual cells, which partitions polar proteins along the cell cortex and can control asymmetric cell division, anisotropic growth...
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Louise Fougere @louisefougere.bsky.social · 14/08/2026
Super happy to share with Magali Grison, @yohannboutte.bsky.social and Christel Poujol this amazing method of super-resolution in plant-cell microscopy 🤗 always further ! always more extraordinary !🔬 🪴 @lbm-bordeaux.bsky.social @bic-bordeaux.bsky.social @univbordeaux.bsky.social
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Chenxin Li, PhD @chenxinli2.bsky.social · 15/08/2026
Arabidopsis Col-0 is not one thing "Genetic and epigenetic divergence among Arabidopsis thaliana Col-0 laboratory lineages since the 1950s". #PlantScience From: www.biorxiv.org/content/10.6...
biorxiv.org
Genetic and epigenetic divergence among Arabidopsis thaliana Col-0 laboratory lineages since the 1950s
The model plant Arabidopsis thaliana has been a workhorse of plant biology since the 1950s, when the Columbia-0 (Col-0) accession was widely adopted by the research community as a reference genotype. ...
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The EMBO Journal @embojournal.org · 30/07/2026
Role of membrane-organizing SPFH proteins in plants: @hannah-web.bsky.social, Alexandra Ehinger, @birgitkemmerling.bsky.social et al define how Arabidopsis HIR2 forms higher-order assemblies and organizes receptor signaling domains link.springer.com/article/10.1...
link.springer.com
The Arabidopsis SPFH protein HIR2 modulates receptor signaling and plasma membrane organization - The EMBO Journal
Plant plasma membrane proteins are organized into distinct domains; however, the principles that govern this spatial organization are not fully understood. HYPERSENSITIVE-INDUCED REACTION (HIR) protei...
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Antoine Taly @ataly.bsky.social · 27/07/2026
Latest preprint on AlphaFold potential and limitations. We look in particular at the addition of ions to models.
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Nature Cell Biology @natcellbio.nature.com · 27/07/2026
☕ @takinishimura.bsky.social et al. develop a platform named cell surface #liposome binding (CLiB), which allows the high-throughput monitoring of protein – #lipid interactions and can be used to design lipid-binding probes. 👉https://rdcu.be/fwgUI www.nature.com/articles/s41...
nature.com
Cell surface liposome binding (CLiB) allows lipid-binding probe engineering via high-throughput screening - Nature Cell Biology
Nishimura et al. develop a platform named cell surface liposome binding (CLiB), which allows the high-throughput monitoring of protein–lipid interactions and can be used to design lipid-binding probes...
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Matyas Fendrych @matesf.bsky.social · 15/07/2026
We are convinced we have solved the mechanism of rapid auxin response in roots. @plantmorpho.bsky.social www.biorxiv.org/content/10.6...
biorxiv.org
Hormone-dependent receptor docking controls calcium channel activity in plants
The phytohormone auxin is a central coordinator of plant growth and development. Besides its canonical effect on gene transcription[1][1],[2][2], auxin triggers an ultra-rapid calcium ion influx that ...
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Laboratory of Plant Morphodynamics @plantmorpho.bsky.social · 23/07/2026
Our new Nat Plants paper introduces WALLΦ, a genetically encoded cell wall pH sensor, and reveals that root developmental zonation is independent of local cell wall pH. Wall pH supports growth at the organ level, but local growth patterns are governed by other mechanisms. doi.org/10.1038/s414...
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Journal of Cell Biology @jcb.org · 20/07/2026
Michaud, @andrewgoryachev.bsky.social, von Dassow, @xenresearchcenter.bsky.social et al. identify a versatile cortical pattern-forming circuit based on #Rho, F-#actin, Ect2, & RGA-3/4 rupress.org/jcb/article/... 📕 In "Collective Behaviors and Self-Organization in Cells" rupress.org/jcb/collecti...
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COST Action PlantWallK @plantwallk.org · 20/07/2026
📢 Two postdoc positions available in @mc-caillaud.bsky.social's group (RDP lab, ENS de Lyon), part of an ERC Consolidator. Project: how plant cells orient their division, combining cell biology, molecular genetics, and mechanical modelling. 📅 Deadline: 1 Oct 26 | Start: Nov 26 onwards Details 🧵👇
Recruitment flyer for two postdoc-funded positions in Marie-Cécile Caillaud's group (RDP laboratory, ENS de Lyon, France). Across the top run six scientific images: a line drawing of an Arabidopsis seedling with roots; a 3D digital reconstruction of a shoot apical meristem with orange and purple sectors marking cell lineages; a confocal microscopy image of plant tissue with green cell outlines and red/orange fluorescent nuclei; two paired 3D cell models in orange/green and yellow/purple showing division plane geometry; and a fluorescence microscopy image of a dividing cell with yellow microtubule-like structures and cyan nuclei on a dark background. Below, the title reads "Two Postdoc-funded positions" with an ERC logo, followed by "Deadline: 1st of Oct 2026" and "Starting date: Nov 2026 and onwards" in a bordered box. The body text is organised into sections: PROJECT (describing research into how plant cells orient their division, combining cell biology, molecular genetics, and multiscale mechanical modelling, with a link to the team website), CANDIDATE (looking for motivated candidates with a strong publication record, prior expertise in plant cell biology or biophysics as a plus, working language English), ENVIRONMENT (describing the ERC Consolidator project, the RDP laboratory hosted at ENS de Lyon, an international and gender-balanced working environment, and the city of Lyon), and RECENT PUBLICATIONS (three pinned references: Goldy et al. 2026 in Science Advances, Gascon et al. 2025 in Current Biology, and Lebecq et al. 2023 in Science Advances). An envelope icon box at the bottom right gives instructions to send a single PDF (cover letter, short summary of previous research, CV with publications, and contact details for two to three referees) to marie-cecile.caillaud@ens-lyon.fr.
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Luke Lavis @rhodamine110.bsky.social · 17/07/2026
Excited to see this collaboration now in print. Dye chemistry meets AI-designed proteins. Three small, orthogonal tags; lifetime modulation; split versions. Request the free dyes at dyes.janelia.org www.science.org/doi/10.1126/...
science.org
De novo design of orthogonal far-red, orange, and green fluorophore-binding proteins for multiplexed imaging
Fluorescent proteins and small-molecule dyes offer complementary advantages for biological imaging: proteins are amenable to genetic tagging, whereas dyes provide superior brightness and photostabilit...
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myosinactncrazy.bsky.social @myosinactncrazy.bsky.social · 17/07/2026
Plant actin networks are rapid mechano-adaptive scaffolds www.biorxiv.org/content/10.6...
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Anja Geitmann @geitmannlab.bsky.social · 19/07/2026
Why do primary plant tissues hold their shape? We are told it's because of turgor pressure—but how does that work mechanically? We investigated how pressurized cylindrical structures support themselves. Read here: doi.org/10.1039/d6sm... Funded by @hfspo.bsky.social www.plantbiomechanics.net
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cryoEM papers @cryoempapers.bsky.social · 03/07/2026
Cryo-EM structure of the Arabidopsis thaliana V-type ATPase www.biorxiv.org/content/10.64898/2026.07.01.735876v1 #cryoEM
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Nature Plants @natplants.nature.com · 10/07/2026
New Article: "Ancient peptide–redox signalling underlies sperm motility in Marchantia" rdcu.be/ftegk Sperm-derived RALF1 is perceived by the FER–LLG receptor complex, triggering NADPH oxidase activation & ROS production in sperm, which thereby promotes sperm motility. #PlantScience
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Plant Science Spotlight @plant-sci.bsky.social · 09/07/2026
🌱🧬 Peptide hormones shape root system architecture via receptor kinases, calcium fluxes, ROS, and MAPK cascades. They integrate internal and external cues to fine-tune root growth Prospects for improving nutrient efficiency and stress resistance #plantscience www.cell.com/plant-commun...
cell.com
Peptide hormones in shaping root system architecture and adaptation: Current advances and translational perspectives
Short summary: Peptide hormones are key signaling molecules that regulate plant root system architecture (RSA) by integrating developmental and environmental cues through receptor kinase–mediated sign...
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bioRxiv Plant Bio @biorxiv-plants.bsky.social · 10/07/2026
A plasmodesmata-specific exocyst complex regulates symplastic connectivity by affecting callose turnover www.biorxiv.org/content/10.64898/20…
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Fabien Ferchaud @fabien-ferchaud.bsky.social · 30/06/2026
Suite à notre article paru récemment dans @commsearth.nature.com, nous avons publié une version pour le grand public et en français avec @france.theconversation.com. Accès libre ➡️ doi.org/10.64628/AAK... @umr-ecosols.bsky.social @inrae-france.bsky.social
doi.org
Faut-il vraiment arrêter de labourer les champs ?
Longtemps indissociables de l’agriculture même, le labour et les activités de travail du sol sont aujourd’hui remis en question.
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Institute of Experimental Botany of the CAS @iebcas.bsky.social · 30/06/2026
#newpaper: CYSTEINE-RICH RLK2 regulates development via callose synthase-dependent symplastic transport in Arabidopsis @academic.oup.com: cell-to-cell transport; sugar metabolism; beta-glucan; carbohydrate accumulation; symplastic loading; intercellular channels; partitioning doi.org/10.1093/plph...
doi.org
CYSTEINE-RICH RLK2 regulates development via callose synthase-dependent symplastic transport in Arabidopsis
Abstract. CYSTEINE-RICH RECEPTOR-LIKE PROTEIN KINASEs (CRKs) play an important role in plant development and stress responses. One of the best described me
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Nature Reviews Molecular Cell Biology @natrevmcb.nature.com · 30/06/2026
New Online! COPII meets autophagy at the ER membrane
dlvr.it
COPII meets autophagy at the ER membrane
Nature Reviews Molecular Cell Biology, Published online: 30 June 2026; doi:10.1038/s41580-026-00997-7This study shows that neutral lipids regulate endoplasmic reticulum (ER) membrane curvature and bendability during ER-phagy, and finds that a COPII protein helps couple ER cargo to the autophagy receptor.
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