Jean-Marie Frachisse
@jm-frachisse.bsky.social
I am Biologist, studing plant mechanoperception through mechanosensitive channel.
Posts are my own
Plant scientist #CNRS,
@I2BCParisSaclay
https://www.i2bc.paris-saclay.fr/equipe-integrated-approaches-to-ion-transport/
Posts are my own
Plant scientist #CNRS,
@I2BCParisSaclay
https://www.i2bc.paris-saclay.fr/equipe-integrated-approaches-to-ion-transport/
Happy and healthy 2026 Liz
Wishing everyone here a happy, healthy, and resistance-filled 2026! We are going to win.
January 2, 2026 at 12:47 PM
Happy and healthy 2026 Liz
Reposted by Jean-Marie Frachisse
💥Beyond happy 💥 Our work is now published in PNAS!
www.pnas.org/doi/10.1073/...
With Gloria Canales & @mazi1.bsky.social we studied how the single celled alga Pyrocystis lunula 🌙 move their chloroplast in response to strong light.
Get ready for some fun mechanics, signals and organelle motion! 🧵
www.pnas.org/doi/10.1073/...
With Gloria Canales & @mazi1.bsky.social we studied how the single celled alga Pyrocystis lunula 🌙 move their chloroplast in response to strong light.
Get ready for some fun mechanics, signals and organelle motion! 🧵
November 19, 2024 at 9:47 AM
💥Beyond happy 💥 Our work is now published in PNAS!
www.pnas.org/doi/10.1073/...
With Gloria Canales & @mazi1.bsky.social we studied how the single celled alga Pyrocystis lunula 🌙 move their chloroplast in response to strong light.
Get ready for some fun mechanics, signals and organelle motion! 🧵
www.pnas.org/doi/10.1073/...
With Gloria Canales & @mazi1.bsky.social we studied how the single celled alga Pyrocystis lunula 🌙 move their chloroplast in response to strong light.
Get ready for some fun mechanics, signals and organelle motion! 🧵
Reposted by Jean-Marie Frachisse
The JXB Tomato special edition is out, featuring the first publication of my PhD! We found that glandular trichome head rupture in tomato is an ultra-sensitive defense against insect predation. 🧵on plant biomechanics, fluid dynamics, and plant-insect interactions! 🧪
academic.oup.com/jxb/article/...
academic.oup.com/jxb/article/...
Glandular trichome rupture in tomato plants is an ultra-fast and sensitive defense mechanism against insects
Glandular trichomes function as ultra-fast biomechanical defense triggers in tomatoes, rupturing upon contact with insects and exposing them to sticky and
academic.oup.com
December 1, 2025 at 7:50 PM
The JXB Tomato special edition is out, featuring the first publication of my PhD! We found that glandular trichome head rupture in tomato is an ultra-sensitive defense against insect predation. 🧵on plant biomechanics, fluid dynamics, and plant-insect interactions! 🧪
academic.oup.com/jxb/article/...
academic.oup.com/jxb/article/...
Nice to see all these generations, especially the young ones, aware and smiling ........
three generations headed off to protest together
December 27, 2025 at 7:45 PM
Nice to see all these generations, especially the young ones, aware and smiling ........
Reposted by Jean-Marie Frachisse
On December 12th, Guillaume Martin became Dr. Martin!
Congratulations for all that you have accomplished during your PhD!!! #PlantScience
@i2bcparissaclay.bsky.social
Congratulations for all that you have accomplished during your PhD!!! #PlantScience
@i2bcparissaclay.bsky.social
December 22, 2025 at 9:10 AM
On December 12th, Guillaume Martin became Dr. Martin!
Congratulations for all that you have accomplished during your PhD!!! #PlantScience
@i2bcparissaclay.bsky.social
Congratulations for all that you have accomplished during your PhD!!! #PlantScience
@i2bcparissaclay.bsky.social
Reposted by Jean-Marie Frachisse
Check out our latest paper. Very glad to see this one finally out. Fantastic work by @charlotte-dlslle.bsky.social . Learn more about MBAP proteins and their roles in brassinosteroid signaling. www.sciencedirect.com/science/arti...
December 8, 2025 at 8:41 AM
Check out our latest paper. Very glad to see this one finally out. Fantastic work by @charlotte-dlslle.bsky.social . Learn more about MBAP proteins and their roles in brassinosteroid signaling. www.sciencedirect.com/science/arti...
Reposted by Jean-Marie Frachisse
New paper!💡 Amir Ohad developed this nifty setup to measure weak forces generated by freely moving plants, based on the deflection of a pendulum (straw from the cafeteria 😎), which does not require any tethering of the plant: academic.oup.com/jxb/advance-...
Plant-obstacle interactions here we come!
Plant-obstacle interactions here we come!
November 2, 2025 at 7:34 AM
New paper!💡 Amir Ohad developed this nifty setup to measure weak forces generated by freely moving plants, based on the deflection of a pendulum (straw from the cafeteria 😎), which does not require any tethering of the plant: academic.oup.com/jxb/advance-...
Plant-obstacle interactions here we come!
Plant-obstacle interactions here we come!
Great job from Pauline Vinet on root mechanotransduction @i2bcparissaclay.bsky.social and @LMSC Paris
Spatiotemporal Analysis Reveals Mechanisms Controlling Reactive Oxygen Species and Calcium Interplay Following Root Compression https://www.biorxiv.org/content/10.1101/2025.10.22.683952v1
October 24, 2025 at 8:11 AM
Great job from Pauline Vinet on root mechanotransduction @i2bcparissaclay.bsky.social and @LMSC Paris
Reposted by Jean-Marie Frachisse
Finally out!
Moderate
POLRMT increase boosts mitochondrial transcription initiation and exercise capacity.
Huge thanks to all co-authors, especially Maria Miranda! @lsajournal.org
@i2bcparissaclay.bsky.social
doi.org/10.26508/lsa...
Moderate
POLRMT increase boosts mitochondrial transcription initiation and exercise capacity.
Huge thanks to all co-authors, especially Maria Miranda! @lsajournal.org
@i2bcparissaclay.bsky.social
doi.org/10.26508/lsa...
POLRMT overexpression increases mtDNA transcription without affecting steady-state mRNA levels
POLRMT is the sole RNA polymerase in human mitochondria, where it generates primers for mitochondrial DNA (mtDNA) replication and transcribes the mtDNA to express genes encoding essential components o...
doi.org
October 18, 2025 at 9:12 AM
Finally out!
Moderate
POLRMT increase boosts mitochondrial transcription initiation and exercise capacity.
Huge thanks to all co-authors, especially Maria Miranda! @lsajournal.org
@i2bcparissaclay.bsky.social
doi.org/10.26508/lsa...
Moderate
POLRMT increase boosts mitochondrial transcription initiation and exercise capacity.
Huge thanks to all co-authors, especially Maria Miranda! @lsajournal.org
@i2bcparissaclay.bsky.social
doi.org/10.26508/lsa...
Reposted by Jean-Marie Frachisse
"What we witnessed in that AI video was one of the most striking public displays of projection and psychosexual rage ever exhibited by a political leader. . .a public humiliation fantasy rooted in race, class, and power. . .a window into the psyche of an authoritarian man who is eroticizing cruelty.
Donald Trump’s AI Video Is a Psychosexual Confession
This Substack is reader-supported.
substack.com
October 21, 2025 at 4:08 PM
"What we witnessed in that AI video was one of the most striking public displays of projection and psychosexual rage ever exhibited by a political leader. . .a public humiliation fantasy rooted in race, class, and power. . .a window into the psyche of an authoritarian man who is eroticizing cruelty.
Reposted by Jean-Marie Frachisse
Ca2+ signature-dependent control of auxin sensitivity in Arabidopsis https://www.biorxiv.org/content/10.1101/2025.10.04.680446v1
October 6, 2025 at 3:03 AM
Ca2+ signature-dependent control of auxin sensitivity in Arabidopsis https://www.biorxiv.org/content/10.1101/2025.10.04.680446v1
Reposted by Jean-Marie Frachisse
Great work by julien Spielmann now published in @theplantjournal.bsky.social.
onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com/doi/10.1111/...
Canonical tyrosine‐based motifs are required for constitutive endocytosis and polarity of IRT1 and contribute to metal uptake
Control of IRT1 cell surface levels is critical for plant iron uptake from the soil and was previously shown to be regulated by ubiquitin-mediated endocytosis upon non-iron metal excess. Here, we she...
onlinelibrary.wiley.com
October 13, 2025 at 2:22 PM
Great work by julien Spielmann now published in @theplantjournal.bsky.social.
onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com/doi/10.1111/...
The link between mechanosensing and AP ...... Finally!
I started to work on MscS-Like proteins 20 years ago, dreaming that they were involved in plant mechanotransduction. And it is becoming more & more clear that they are!
#plantscience 🧪
"DmMSL10 is crucial for mechanosensing, facilitating AP firing by generating a receptor potential (RP) amplitude."
#plantscience 🧪
"DmMSL10 is crucial for mechanosensing, facilitating AP firing by generating a receptor potential (RP) amplitude."
🍀🔬
MSL10 is a high-sensitivity mechanosensor in the tactile sense of the Venus flytrap @natcomms.nature.com from Toyota lab.
www.nature.com/articles/s41...
MSL10 is a high-sensitivity mechanosensor in the tactile sense of the Venus flytrap @natcomms.nature.com from Toyota lab.
www.nature.com/articles/s41...
October 7, 2025 at 7:52 PM
The link between mechanosensing and AP ...... Finally!
Reposted by Jean-Marie Frachisse
When the World Sleeps - by Palestinian artist, Malak Mattar
Malak was born in 1999 in the Gaza Strip and grew up under occupation and the military siege. She came to London in 2023 to study Fine Art
More about this artist and her work, here: www.malak-mattar.com
#art #Palestine #Gaza
Malak was born in 1999 in the Gaza Strip and grew up under occupation and the military siege. She came to London in 2023 to study Fine Art
More about this artist and her work, here: www.malak-mattar.com
#art #Palestine #Gaza
August 24, 2025 at 8:00 AM
When the World Sleeps - by Palestinian artist, Malak Mattar
Malak was born in 1999 in the Gaza Strip and grew up under occupation and the military siege. She came to London in 2023 to study Fine Art
More about this artist and her work, here: www.malak-mattar.com
#art #Palestine #Gaza
Malak was born in 1999 in the Gaza Strip and grew up under occupation and the military siege. She came to London in 2023 to study Fine Art
More about this artist and her work, here: www.malak-mattar.com
#art #Palestine #Gaza
Reposted by Jean-Marie Frachisse
23 pesticides très utilisés en France viennent d'être interdits d'un seul coup au Danemark. Explications : youtube.com/shorts/XDBSv...
23 pesticides interdits d'un seul coup ! #agriculture
YouTube video by Pierre Girard
youtube.com
July 23, 2025 at 12:14 PM
23 pesticides très utilisés en France viennent d'être interdits d'un seul coup au Danemark. Explications : youtube.com/shorts/XDBSv...
Reposted by Jean-Marie Frachisse
L'Arabie Saoudite a changé ? Bienvenue dans un pays sous influence(urs).
August 20, 2025 at 8:03 AM
L'Arabie Saoudite a changé ? Bienvenue dans un pays sous influence(urs).
Reposted by Jean-Marie Frachisse
« Arabie Saoudite : derrière les influenceurs, le règne de la peur », un documentaire à retrouver sur ARTE ⤵️
Arabie saoudite : derrière les influenceurs, le règne de la peur | Sources | ARTE
YouTube video by ARTE
www.youtube.com
August 20, 2025 at 8:05 AM
« Arabie Saoudite : derrière les influenceurs, le règne de la peur », un documentaire à retrouver sur ARTE ⤵️
Reposted by Jean-Marie Frachisse
Le documentaire « Pepe Mujica » est à retrouver sur ARTE 📺
Pepe Mujica - Le président et la motte de terre - Regarder le documentaire complet | ARTE
Une rencontre au long cours avec l'atypique ex-président uruguayen Pepe Mujica (de 2010 à 2015), dont l'humanisme jovial ravit autant qu'il bouleverse. Un irrésistible "miracle" latino-américain.
www.arte.tv
May 27, 2025 at 9:31 AM
Le documentaire « Pepe Mujica » est à retrouver sur ARTE 📺
Reposted by Jean-Marie Frachisse
🫣🙄
This is not how I got the Nobel Prize!
"Out of the blue, while Finance Minister Jens Stoltenberg was walking down the street in Oslo, Donald Trump called," Dagens Naeringsliv reported, citing unnamed sources.
"He wanted the Nobel Prize - and to discuss tariffs."
www.reuters.com/world/asia-p...
This is not how I got the Nobel Prize!
"Out of the blue, while Finance Minister Jens Stoltenberg was walking down the street in Oslo, Donald Trump called," Dagens Naeringsliv reported, citing unnamed sources.
"He wanted the Nobel Prize - and to discuss tariffs."
www.reuters.com/world/asia-p...
Trump told Norwegian minister he wants Nobel Prize, newspaper says
When U.S. President Donald Trump called Norway's finance minister last month to discuss tariffs, he also told him he wanted the Nobel Peace Prize, Norwegian business daily Dagens Naeringsliv reported on Thursday.
www.reuters.com
August 14, 2025 at 11:28 PM
🫣🙄
This is not how I got the Nobel Prize!
"Out of the blue, while Finance Minister Jens Stoltenberg was walking down the street in Oslo, Donald Trump called," Dagens Naeringsliv reported, citing unnamed sources.
"He wanted the Nobel Prize - and to discuss tariffs."
www.reuters.com/world/asia-p...
This is not how I got the Nobel Prize!
"Out of the blue, while Finance Minister Jens Stoltenberg was walking down the street in Oslo, Donald Trump called," Dagens Naeringsliv reported, citing unnamed sources.
"He wanted the Nobel Prize - and to discuss tariffs."
www.reuters.com/world/asia-p...
Reposted by Jean-Marie Frachisse
🍀🔬
CSLD5-mediated cell wall remodelling regulates tissue mechanics and shoot meristem growth @natcomms.nature.com
www.nature.com/articles/s41...
Movies: Cell division orientation in wild-type (attached) and csld5 (comment) shoot apical meristem.
CSLD5-mediated cell wall remodelling regulates tissue mechanics and shoot meristem growth @natcomms.nature.com
www.nature.com/articles/s41...
Movies: Cell division orientation in wild-type (attached) and csld5 (comment) shoot apical meristem.
August 9, 2025 at 6:35 PM
🍀🔬
CSLD5-mediated cell wall remodelling regulates tissue mechanics and shoot meristem growth @natcomms.nature.com
www.nature.com/articles/s41...
Movies: Cell division orientation in wild-type (attached) and csld5 (comment) shoot apical meristem.
CSLD5-mediated cell wall remodelling regulates tissue mechanics and shoot meristem growth @natcomms.nature.com
www.nature.com/articles/s41...
Movies: Cell division orientation in wild-type (attached) and csld5 (comment) shoot apical meristem.
Tanks to Yannick Guerringue for his contribution to this story on mechanosensitive channel and calcium!
The Rapid Mechanically Activated (RMA) channel transduces increases in plasma membrane tension into transient calcium influx https://www.biorxiv.org/content/10.1101/2025.08.06.668926v1
August 7, 2025 at 7:39 PM
Tanks to Yannick Guerringue for his contribution to this story on mechanosensitive channel and calcium!
Reposted by Jean-Marie Frachisse
🎓 My team is seeking a PhD student in Biochemistry & Cell Biology at I2BC, Paris-Saclay!
🔬 Study cytoskeletal signaling in collective cell migration
🌍 Fully funded, 3 yrs | 📍 Gif-sur-Yvette, France
🗓️ Apply by Aug 22 via the following link:
emploi.cnrs.fr/Offres/Docto...
🔬 Study cytoskeletal signaling in collective cell migration
🌍 Fully funded, 3 yrs | 📍 Gif-sur-Yvette, France
🗓️ Apply by Aug 22 via the following link:
emploi.cnrs.fr/Offres/Docto...
August 6, 2025 at 7:10 PM
🎓 My team is seeking a PhD student in Biochemistry & Cell Biology at I2BC, Paris-Saclay!
🔬 Study cytoskeletal signaling in collective cell migration
🌍 Fully funded, 3 yrs | 📍 Gif-sur-Yvette, France
🗓️ Apply by Aug 22 via the following link:
emploi.cnrs.fr/Offres/Docto...
🔬 Study cytoskeletal signaling in collective cell migration
🌍 Fully funded, 3 yrs | 📍 Gif-sur-Yvette, France
🗓️ Apply by Aug 22 via the following link:
emploi.cnrs.fr/Offres/Docto...
Reposted by Jean-Marie Frachisse
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...
www.biorxiv.org/content/10.1...
August 1, 2025 at 4:29 PM
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...
www.biorxiv.org/content/10.1...
Reposted by Jean-Marie Frachisse
Les politiques et journalistes qui parlent d'écologie punitive et d'atteinte à la liberté, c'est quoi votre programme quand il fait 40°C à l'ombre ?
June 29, 2025 at 9:04 AM
Les politiques et journalistes qui parlent d'écologie punitive et d'atteinte à la liberté, c'est quoi votre programme quand il fait 40°C à l'ombre ?