Salicylic acid-induced alkalinization of the apoplast requires TRANSMEMBRANE KINASE 1 and results in growth attenuation The phytohormone salicylic acid (SA) has a key role in regulating plant growth and stress response. In the past, most of the growth-related SA functions have been explained by crosstalk with the maste...

Thanks Sjon! I fixed it: www.biorxiv.org/cgi/content/...

New preprint from our lab: Salicylic acid- induced alkalinization of the apoplast requires TMK1 and results in growth attenuation www.biorxiv.org/content/10.6... Big thanks to all who contributed @julien-gronnier.bsky.social @guidogrossmann.bsky.social @kaltraxhelilaj.bsky.social

New preprint from our lab: Salicylic acid- induced alkalinization of the apoplast requires TMK1 and results in growth attenuation

www.biorxiv.org/cgi/content/...

Big thanks to all who contributed @guidogrossmann.bsky.social
@julien-gronnier.bsky.social
@kaltraxhelilaj.bsky.social

The plant stress hormone salicylic acid has unexpected functions in growth and development. Notably, the classical SA receptores NPRs seems not to participate. If you want to know more, have a look at the little review we wrote: www.frontiersin.org/journals/pla...

Dear ENPER community,
We are pleased to invite you to the next ENPER meeting, which will be held in Sofia, Bulgaria, from 26 to 28 August 2026. Link to the ENPER 2026 website:
enper2026.bio21.bas.bg

Amazing!

7/ Taken together, this represents a novel mechanism to attenuate growth, potentially to allow SA reallocating resources to enhance plant robustness. Shout-out to Dr. Jonas Müller for leading the crew and thanks to all collaborators and the @dfg.de and BioComp for funding

6/ Notably, the vha a3 vha a3 mutant resembles SA treated plants (shorter roots, cell size differences of atricho-and trichoblasts) and has significantly elevated endogenous SA levels

5/ Turns out that SA treatment increases vacuolar pH by inhibiting V-ATPase activity

4/…..we assessed vacuolar occupancy (relative size) in different zones of the root.

3/ ….but PIN2 and auxin receptor mutants are not resistant again SA mediated growth inhibition. Since auxin impacts on vacuole size….

2/ SA impacts auxin signaling and PIN2 distribution……

1/ SA restricts cell elongation in the root but not in the shoot……

Salicylic acid inhibits V-ATPase activity and restricts cell elongation The phytohormone salicylic acid directly inhibits V-ATPase activity and cell elongation thereby limiting plant growth.

Interested in plant hormones? Check out our newest research paper in @plantphys.bsky.social about a novel role of Salicylic Acid (SA) restricting growth: academic.oup.com/plphys/artic...

Congratulations and Zum Wohl!

Its really cool how more and more of the PILS functions are revealed! Including a couple of unexpected turns 😀

ERAD machinery controls the conditional turnover of PIN-LIKES in plants Plant ERAD machinery governs the turnover of auxin transporters involved in developmental and stress responses.

11 years ago I did experiments which contribute to the cool story from @kleinevehnlab.bsky.social @seinabnoura.bsky.social about how the ERAD machinery controls the conditional turnover of PIN-LIKES for acclimative growth. Science often requires quite some time:
www.science.org/doi/10.1126/...

ERAD machinery controls the conditional turnover of PIN-LIKES in plants Plant ERAD machinery governs the turnover of auxin transporters involved in developmental and stress responses.

Thrilled to share our latest story on the ERAD machinery and how it controls the conditional turnover of PIN-LIKES for acclimative growth

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

Congrats - I knew you would thrive at the MPIPZ! I wish you all the best in Zürich!

What is the vacuole doing during cell division? Exciting topic! #fluorescencefriday

Congratulations!

New preprint from the lab. We mapped the dynamics of phospholipids during lateral root formation and show that PI(4,5)P₂ plays a key role: targeted reduction in pericycle promotes LR development.
www.biorxiv.org/content/10.1...

🧵1/
New preprint out!
We reveal that ERAD, a protein degradation pathway, selectively targets intracellular PILS auxin transport facilitators to control growth.
This expands ERAD's role beyond protein quality control, right into developmental regulation.
www.biorxiv.org/content/10.1...

Root expansion microscopy: A robust method for super resolution imaging in Arabidopsis Root expansion microscopy (ROOT-ExM) achieves super-resolution expansion microscopy in plants.

This is going to be huge 😅https://academic.oup.com/plcell/article/37/4/koaf050/8109904

#Fluorescencefriday @rptu.bsky.social the ER is almost always the most beautiful in the plant leaf

In memoriam: David G. Robinson - Protoplasma We are deeply saddened to report that David Gordon Robinson passed away on Tuesday, 5 November 2024. He has left behind his wife and three children. Without doubt, David was one of Europe’s leading pl...

Orbituary for David G. Robinson (Heidelberg) now published:
link.springer.com/article/10.1...

I mean...wow! Expressing betalains in tobacco:

Complexome profiling of the Chlamydomonas psb28 mutant reveals TEF5 as an early photosystem II assembly factor (Julia Lang, Katharina König, Benedikt Venn, Saskia Zeilfelder, Matthias Ostermeier, Benjamin Spaniol, et. al.) doi.org/10.1093/plce... #PlantScience

Congratulations Tonni!

Apoplastic barriers are essential for nodule formation and nitrogen fixation in Lotus japonicus Establishment of the apoplastic root barrier known as the Casparian strip occurs early in root development. In legumes, this area overlaps with nitrogen-fixing nodule formation, which raises the possi...

Finally!
Im so excited to present to culmination of many years of work from the fantastic Defeng Shen and some great collaborators. For details, I have made a digested thread below, but if you are more interested feel free to reach out (and read the paper of course).
www.science.org/doi/10.1126/...