Alex Martiniere
@alexmartiniere.bsky.social
📤 84
📥 91
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Plant cell biologist, PI @ IPSIM, Montpellier France
pinned post!
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....
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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 ...
https://www.embopress.org/doi/full/10.1038/s44319-025-00412-w
6 months ago
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Emmanuelle Bayer
2 months ago
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
26 days ago
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
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'Leaves & Lasers' With Professor Chris Hawes | Nature Live Talk - Natural History Museum
YouTube video by Oxford Brookes Health & Life Sciences
https://www.youtube.com/watch?v=eAFZbIdHZ7c
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Alex Martiniere
Luis Alonso Baez
about 2 months ago
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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Alex Martiniere
Nature Plants
about 1 month ago
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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Alex Martiniere
Journal of Cell Biology
about 1 month ago
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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www.biorxiv.org/content/10.1...
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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...
https://www.biorxiv.org/content/10.1101/2025.08.08.669267v1
about 2 months ago
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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...
https://www.nature.com/articles/s41467-025-62852-1
about 2 months ago
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Mukund Thattai
about 2 months ago
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. 🧵
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Alex Martiniere
José Dinneny
about 2 months ago
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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Alex Martiniere
2 months ago
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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Alex Martiniere
2 months ago
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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Super interesting work on hydrotropism and gravitropism
www.pnas.org/doi/10.1073/...
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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...
https://www.pnas.org/doi/10.1073/pnas.2427315122
3 months ago
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Alex Martiniere
Maddy Seale
4 months ago
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/...
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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...
https://www.science.org/doi/10.1126/science.adu1470
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Alex Martiniere
PM Delaux
5 months ago
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...
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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...
https://lejournal.cnrs.fr/articles/plantes-eau-terre-evolution
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Alex Martiniere
Gregor Mendel Institute of Molecular Plant Biology
5 months ago
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
5 months ago
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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Alex Martiniere
Journal of Cell Biology
5 months ago
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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Alex Martiniere
Marie-Cécile Caillaud
5 months ago
🚨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...
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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…
https://www.sciencedirect.com/science/article/pii/S096098222500510X?dgcid=author
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Fabien Miart
5 months ago
🌱 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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Alex Martiniere
Simon Michaeli
6 months ago
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....
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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...
https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.20446
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Alex Martiniere
Nature Plants
6 months ago
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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Alex Martiniere
Rodrigo Reis
6 months ago
Amazing resource for the Arabidopsis and plant community
www.cell.com/cell/fulltex...
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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...
https://www.cell.com/cell/fulltext/S0092-8674(25)00297-1?rss=yes
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Alex Martiniere
PM Delaux
6 months ago
Great discussion! Congratulations again to François!
add a skeleton here at some point
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Alex Martiniere
Marie-Cécile Caillaud
6 months ago
😍😍
add a skeleton here at some point
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Alex Martiniere
Emmanuelle Bayer
6 months ago
Plasmodesmata: A new frontier for membrane contact site intercellular communication
plantae.org?p=140096
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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…
https://plantae.org/?p=140096
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Alex Martiniere
KleineVehnLab
7 months ago
We are excited to update you on two distinct auxin oscillations (local & systemic), revealing how root architecture adapts to fluctuating conditions!
@cibss.bsky.social
@biologyunifreiburg.bsky.social
@cbgpmadrid.bsky.social
www.biorxiv.org/content/10.1...
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Two distinct oscillatory auxin signals define the plasticity of lateral rooting in Arabidopsis thaliana
The phytohormone auxin defines lateral root pre-branch sites (PBS) in the growing primary root tip. How PBS contribute to the plasticity of the root system architecture remains incompletely understood...
https://www.biorxiv.org/content/10.1101/2024.08.16.608248v2
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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....
loading . . .
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 ...
https://www.embopress.org/doi/full/10.1038/s44319-025-00412-w
6 months ago
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Alex Martiniere
Maizel lab
7 months ago
Great theory paper by
@hadrienoliveri.bsky.social
& I. Cheddadi: a Hydromechanical field theory of plant growth treating tissue as a growing poroelastic medium. It's a nice bridge from cell biophysics to tissue-scale growth.
arxiv.org/abs/2409.02775
&
tinyurl.com/22n9ykdo
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Hydromechanical field theory of plant morphogenesis
The growth of plants is a hydromechanical phenomenon in which cells enlarge by absorbing water, while their walls expand and remodel under turgor-induced tension. In multicellular tissues, where cells...
https://arxiv.org/abs/2409.02775
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Alex Martiniere
Jenny Russinova
7 months ago
🌱 When a root cell undergoes symmetric division, are the daughter cells actually identical? By combining live-cell imaging and scRNAseq we discovered a new cell state with uneven BR activity. Read our full paper in Cell:
doi.org/10.1016/j.ce...
@nvukas.bsky.social
@trevormnolan.bsky.social
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Alex Martiniere
Ryo Yokoyama
7 months ago
Genetically encoded biosensors as gateways to retrograde redox signalling in live plants
academic.oup.com/jxb/article-...
@jxbotany.bsky.social
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Genetically encoded biosensors as gateways to retrograde redox signalling in live plants
Abstract. In eukaryotic cells, protein supply to organelles varies depending on the stage of development and, in particular, on the exposure to environment
https://academic.oup.com/jxb/article-abstract/doi/10.1093/jxb/eraf080/8063796
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Alex Martiniere
CNRS
7 months ago
#Communiqué
🗞️ Le CNRS exprime sa solidarité avec les scientifiques exerçant aux États-Unis, où la liberté académique est aujourd'hui mise à l’épreuve. 👉
www.cnrs.fr/fr/presse/le...
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CNRS Biologie
7 months ago
Une découverte majeure en biologie végétale ! 🌱 ✨
@yohannboutte.bsky.social
et ses collaborateurs ont identifié un nouveau compartiment cellulaire chez les plantes, inconnu jusqu’ici ! Une avancée qui ouvre la voie à de nouvelles recherches sur le développement des plantes ! 🌿
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Découverte d’un nouveau compartiment cellulaire chez les plantes
L’origine et l’évolution des compartiments intracellulaires des cellules eucaryotes, c’est-à-dire celles qui possèdent un noyau, restent une énigme.
https://www.insb.cnrs.fr/fr/cnrsinfo/decouverte-dun-nouveau-compartiment-cellulaire-chez-les-plantes
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Alex Martiniere
Michael Hothorn
7 months ago
In today's lab journal club, we had a look at this very nice (and complete) story on Pi availability regulating flowering time + a neat mechanism.
@hatem-rouached.bsky.social
www.biorxiv.org/content/10.1...
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Alex Martiniere
José Dinneny
8 months ago
Proud to share our latest published work on moisture responsive root development-a process we call hydropatterning! We find that this process has been under differential selection during maize breeding and the gaseous hormone ethylene prevents branching in air.
www.science.org/doi/epdf/10....
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Moisture-responsive root-branching pathways identified in diverse maize breeding germplasm
Plants grow complex root systems to extract unevenly distributed resources from soils. Spatial differences in soil moisture are perceived by root tips, leading to the patterning of new root branches t...
https://www.science.org/doi/epdf/10.1126/science.ads5999
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Marc Somssich
7 months ago
📜 Transformation of flg22 perception into electrical signals decoded in vasculature leads to sieve tube blockage and pathogen resistance 🧑🔬
@furch-lab.bsky.social
, Aart J. E. van Bel, et al. 📔 Science Advances 🔗
www.science.org/doi/10.1126/...
#️⃣
#PlantScience
#PlantImmunity
#PlantSignaling
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Transformation of flg22 perception into electrical signals decoded in vasculature leads to sieve tube blockage and pathogen resistance
Flg22-triggered dual electric signals are crucial for generation of local and systemic defense responses.
https://www.science.org/doi/10.1126/sciadv.ads6417
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Alice Vayssières
7 months ago
SPS - Summer School 2025 on Advanced Plant Imaging – API : From super-resolution to fluorescence lifetime imaging microscopy 🔬🌱 in Versailles 👑🇨🇵 For enthusiastic PhD students or young postdoctoral researchers ! Only one week left to apply 👇
eng-saclay-plant-sciences.hub.inrae.fr/teaching-and...
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Yohann Boutté
7 months ago
Exited to announce our study on ER-Golgi Intermediate Compartment (ERGIC) in plants!!
www.nature.com/articles/s41...
Amazing and innovative work from
@louisefougere.bsky.social
and Magali Grison from
@lbm-bordeaux.bsky.social
,
#SuperResolution
,
@naturecellbiology.bsky.social
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ER-to-Golgi trafficking through a dynamic intermediate cis-Golgi tubular network in Arabidopsis - Nature Cell Biology
Fougère, Grison et al. show that the ER–Golgi intermediate compartment (ERGIC) in plants is a tubulo-vesicular network marked by MEMBRIN proteins that is largely Golgi-independent. The plant ERGIC mat...
https://www.nature.com/articles/s41556-025-01624-x
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