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Alex Martiniere

@alexmartiniere.bsky.social

87 followers 91 following 4 posts

Plant cell biologist, PI @ IPSIM, Montpellier France

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Alex Martiniere @alexmartiniere.bsky.social · Mar 18

Rho of Plant are signalling HUB and GEF behave as signal specific switches. We found that GEF14 specicaly activates ROP6 during osmotic signal. by 2 excellent young researcher L.Gorgues and M.Smokvarska One more great collaboration with
@yvonjaillais.bsky.social

www.embopress.org/doi/full/10....

GEF14 acts as a specific activator of the plant osmotic signaling pathway by controlling ROP6 nanodomain formation | EMBO reports

imageimageRho Of Plant 6 (ROP6) acts as hub for several independent signaling processes and relies on stimuli-dependent membrane nanodomain formation. This study reveals that the GEF isoform GEF14 is ...

www.embopress.org

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Reposted by Alex Martiniere

Emmanuelle Bayer @emmanuellebayer.bsky.social · Jul 28

We have two open Post-Doc positions in my group at the interface with:
1- @ataly.bsky.social for molecular dynamics
2- Bruno Guillotin from protein mobility

Apply by sending CV, two ref letters and a short motivation letter to me : [email protected]. Deadline 15 sept.

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Marc Somssich @somssich.bsky.social · Sep 2

This is a fantastic talk by Chris Hawes @nhm-london.bsky.social.

He speaks about #PlantMicroscopy in particular, but also the History of #Microscopy.

www.youtube.com/watch?v=eAFZ...

Have a look at this Obituary of Chris, too:
onlinelibrary.wiley.com/doi/10.1111/...

#PlantScience

'Leaves & Lasers' With Professor Chris Hawes | Nature Live Talk - Natural History Museum

YouTube video by Oxford Brookes Health & Life Sciences

www.youtube.com

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Reposted by Alex Martiniere

Luis Alonso Baez @luisalonsobaez.bsky.social · Aug 1

One of the key aspects influencing morphogenesis is mechanics. We mapped the mechanical properties of living roots at the tissue and cellular levels using Brillouin microscopy and molecular rotors.

www.biorxiv.org/content/10.1...

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Nature Plants @natplants.nature.com · Aug 18

New Article: "Plasma membrane CYBDOM proteins catalyse apoplastic AsA regeneration and interact with RbohD to activate autophagy and drought tolerance in plants" rdcu.be/eBbpf

CYBDOM proteins promote drought tolerance.

With Research Briefing: rdcu.be/eBbpM

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Reposted by Alex Martiniere

Journal of Cell Biology @jcb.org · Aug 14

Evolutionarily diverse caveolins share a common structural framework built around amphipathic discs, say Bing Han, Sarah Connolly, Melanie Ohi (@umich.edu), Anne Kenworthy (University of Virginia) and colleagues: rupress.org/jcb/article/...

#StructuralBiology #Membrane #lipid

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Alex Martiniere @alexmartiniere.bsky.social · Aug 10

www.biorxiv.org/content/10.1...

Spatiotemporal Dynamics of Anionic Phospholipids Orchestrate Lateral Root Initiation and Morphogenesis in Arabidopsis thaliana

Lateral root (LR) development in Arabidopsis thaliana requires precise coordination of pericycle founder cell (FC) specification, patterning, and morphogenesis. While auxin signalling is well establis...

www.biorxiv.org

Alex Martiniere @alexmartiniere.bsky.social · Aug 10

www.nature.com/articles/s41...

Single-molecule tweezers decode hidden dimerization patterns of membrane proteins within lipid bilayers - Nature Communications

Membrane protein dimerization is a regulatory mechanism in cell signaling. Here, the authors introduce a single-molecule tweezer platform to resolve transient intermediate states and quantify the kine...

www.nature.com

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Mukund Thattai @thattai.bsky.social · Aug 4

I set out to review the evolution of eukaryotic intracellular traffic, but along the way a new hypothesis came into focus: maybe the earliest membrane carriers were tubules, not coated vesicles!

New preprint: ecoevorxiv.org/repository/v...

Here’s the idea. 🧵

A schematic showing two models for the evolution of the eukaryotic cell plan starting from an archaeal ancestor. The "inside-out" and "outside-in" models both lead to an intermediate stage with internal and plasma membranes connected by tubules. The sequence continues through the formation of an endomembrane lumen, followed by the emergence of membrane contact sites and tubular carriers, and finally coated vesicles and stable compartments.

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José Dinneny @josedinneny.bsky.social · Aug 3

Very proud to share our latest preprint: postdoc/LRSF fellow Yue Rui studies the mechanisms regulating attachment of the cell wall to the plasma membrane. The Cellulose Synthase Complex and REMORINs determine the extent of attachment and root osmotic stress tolerance. www.biorxiv.org/content/10.1...

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mariebarberon.bsky.social @mariebarberon.bsky.social · Jul 22

Very excited that our work on directional symplastic transport in differentiated root is now published!A developmental switch controls cell-to-cell transport in roots via pectin-linked plasmodesmata changes: Molecular Plant www.cell.com/molecular-pl...

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mariebarberon.bsky.social @mariebarberon.bsky.social · Jul 24

Happy to see Kevin Robe’s work on ZIP transporters published. We found evidences that ZIP2 and ZIP8 are involved in Cu and Fe acquisition respectively and confirmed the role of ZIP3 and ZIP5 in Zn acquisition. journals.plos.org/plosgenetics...

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Alex Martiniere @alexmartiniere.bsky.social · Jun 27

Super interesting work on hydrotropism and gravitropism
www.pnas.org/doi/10.1073/...

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

www.pnas.org

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Maddy Seale @maddyseale.bsky.social · Jun 13

Out First Release in @science.org today, nice work finding that redox regulates multimerisation of Aux/IAA proteins during root xerobranching:

www.science.org/doi/10.1126/...

Redox-regulated Aux/IAA multimerization modulates auxin responses

Reactive oxygen species function as key signals in plant adaptation to environmental stresses like drought. Roots respond to transient water unavailability by temporarily ceasing branching through the...

www.science.org

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PM Delaux @pierremarcdelaux.bsky.social · May 16

Et un peu plus de terrestrialization dans la lettre du @cnrs.fr , toujours avec nos deux compères @chistinesd.bsky.social et @huguesrenault.bsky.social !

lejournal.cnrs.fr/articles/pla...

Et les plantes colonisèrent la terre ferme…

Il y a un demi-milliard d’années, les plantes, encore aquatiques, partaient à la conquête des continents. Une transition qui a métamorphosé la Terre et son atmosphère, ouvrant la voie aux vertébrés te...

lejournal.cnrs.fr

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Gregor Mendel Institute of Molecular Plant Biology @gmivienna.bsky.social · May 9

We are hiring a postdoctoral researcher! Join the Ma Lab in exploring the the intricate interplay between plant development and defense signaling. Link below. #jobs #research #plantbiology #vienna

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Jian-Pu 韩 @jian-pu.bsky.social · May 11

Delighted to share one piece of my postdoc work in preprint: Through forward genetic screening for suberin deposition in root endodermis, we identified SUBER GENE 1 (SBG1) by GWAS as a novel regulator for suberization by interacting with Type One Protein Phosphatase. www.biorxiv.org/content/10.1...

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Journal of Cell Biology @jcb.org · May 9

MTMR regulates KRAS function by controlling plasma membrane levels of phospholipids, say Taylor Lange, Kwang-jin Cho @wrightstateu.bsky.social and colleagues: rupress.org/jcb/article/...

#Cancer #Membrane #lipid #CellSignaling #Biochemistry

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Marie-Cécile Caillaud @mc-caillaud.bsky.social · May 8

🚨Our paper is out!

If you ever wonder how four-way junctions are avoided during plant cell division, some answers here 🧬🍀🔬🧪🤓

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

Conserved mechanical hallmark guides four-way junction avoidance during plant cytokinesis

When building an organ, adjacent cells coordinate to form topologically stable junctions by integrating mechanosensitive signaling pathways. Positioni…

www.sciencedirect.com

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Fabien Miart @fabienmiart.bsky.social · May 6

🌱 Real-time #stomata imaging just got an upgrade!
Proud to share our latest progress with #PHENOM, now equipped with a custom leaf holder for non-destructive, long-term analysis in natural conditions. 🔬

Works anywhere: field, greenhouse, or growth chamber.

Want to know more? 👉 www.miatecs.com !

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Simon Michaeli @michaelilab.bsky.social · Apr 11

A study led by my good friend from the jolly days at the @ibmp-cnrs.bsky.social (now @psb-vib.bsky.social, UGent), Marieke Dubois

nph.onlinelibrary.wiley.com/doi/full/10....

Dual and spatially resolved drought responses in the Arabidopsis leaf mesophyll revealed by single‐cell transcriptomics

Drought stress imposes severe challenges on agriculture by impacting crop performance. Understanding drought responses in plants at a cellular level is a crucial first step toward engineering improve...

nph.onlinelibrary.wiley.com

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Nature Plants @natplants.nature.com · Apr 11

New Article: "The PP2CH- and PBL27-mediated phosphorylation switch of aluminium ion receptor PSKR1/ALR1 controls plant Al sensing ability" rdcu.be/ehnQE

PP2C phosphatases & PBL27 kinase modulate ALR1–BAK1 complex formation, controlling plant Al sensing & resistance.

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Rodrigo Reis @rodrigoreislab.com · Apr 12

Amazing resource for the Arabidopsis and plant community

www.cell.com/cell/fulltex...

An Arabidopsis single-nucleus atlas decodes leaf senescence and nutrient allocation

A comprehensive single-nucleus transcriptomic atlas of Arabidopsis across multiple tissues enables the quantification of leaf cell aging state at a single-cell level, highlighting the senescence-relat...

www.cell.com

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PM Delaux @pierremarcdelaux.bsky.social · Apr 10

Great discussion! Congratulations again to François!

Benoit Lacombe @lacombeb.bsky.social · Apr 10

Francois Barbier Habilitation defense today
@pierremarcdelaux.bsky.social @cnrs.fr @cnrsbiologie.bsky.social

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Marie-Cécile Caillaud @mc-caillaud.bsky.social · Apr 10

😍😍

CNRS Biologie @cnrsbiologie.bsky.social · Apr 10

🌿🔬 Une révolution dans l’imagerie des cellules végétales !

Des scientifiques ont développé une méthode innovante pour observer les cellules végétales en 3D, avec une précision jamais atteinte. De quoi ouvrir de nouvelles perspectives en biologie végétale 🌱

Une révolution dans l’imagerie des cellules végétales

En 2015, une nouvelle technique de microscopie, appelée microscopie d’expansion, a bouleversé l’imagerie biologique en dépassant les limites de résolution des

buff.ly

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Emmanuelle Bayer @emmanuellebayer.bsky.social · Mar 19

Plasmodesmata: A new frontier for membrane contact site intercellular communication plantae.org?p=140096

Plasmodesmata: A new frontier for membrane contact site intercellular communication | Plantae

Membrane contact sites (MCSs) serve a critical role in intracellular communication, particularly between organelle membranes, enabling direct molecular transfer. Less clear is the role MCSs play in…

plantae.org

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