#Suberin
“Despite their porosity and hygroscopicity, the spines prevent direct absorption of fog water into the living cortex due to the presence of a suberin-rich tissue layer at the spine base that instead promotes surface runoff towards the roots.” 👇
One day in the lab, we accidentally discovered that the spines of a cactus 🌵 straighten when exposed to fog. I was intrigued and so were my collaborators. How does this work and what can be gained from it? Here are some of the answers in our new preprint:
doi.org/10.1101/2025...
October 9, 2025 at 1:12 PM Everybody can reply
Membrane trafficking meets root barriers, resilience, and carbon storage 🌱🌍
New discovery: Blocking clathrin-mediated endocytosis in Arabidopsis roots sparks ROS bursts → ectopic suberization. This might unlock ways to increase suberization in roots and C in soils
#PlantScience #RootBiology #Suberin
doi.org
October 2, 2025 at 1:06 PM Everybody can reply
7 reposts 11 likes 2 saves
Upregulated pathways related to methionine, melatonin, and suberin biosynthesis likely contribute to stress adaptation through root growth suppression and ion homeostasis maintenance.
August 30, 2025 at 4:10 AM Everybody can reply
#Mangrovethickets protect Caribbean islands, their wood naturally waterproof, their roots exuding suberin, a waxy substancee removing salt at their roots. Today mangrove roots are strangled by plastic/nonbiodegradable debris. Their deterioration has allowed immense #changesincoastalecology
August 28, 2025 at 12:46 PM Everybody can reply
Many TF-celltype relationships reflect long-standing functional knowledge. For example, MYB107 target genes lit up suberized-endodermis, aligning with the TF's known role in suberin synthesis. Others were entirely new. This opens doors for creative ways to describe and even manipulate cell types.
August 19, 2025 at 11:37 PM Everybody can reply
4/4 Surprisingly, MYB68—unlike other MYBs involved in suberin deposition—represses cork cambium proliferation.
🌱Want to know more about it?
🔗 doi.org/10.1016/j.ce...
July 24, 2025 at 7:44 PM Everybody can reply
2/4 David revealed that MYB68 promotes suberin deposition in the cork.
July 24, 2025 at 7:28 PM Everybody can reply
Fresh from the press! For suberin lovers!
Work led by @, my former PhD student and now postdoc in the team, with help of @sarahorvath.bsky.social and in collaboration with @tonnigrubeandersen.bsky.social .
🔗 DOI: doi.org/10.1016/j.ce...
1/4 #PlantScience
July 24, 2025 at 7:25 PM Everybody can reply
21 reposts 76 likes
Congrats and thanks for a piece of the suberin cake!
July 7, 2025 at 9:06 PM Everybody can reply
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So glad that the new suberin work from @tonnigrubeandersen.bsky.social 's lab is out now 🙂 Thanks Tonni for giving us the chance to work on it too! Congrats to all co-authors and especially @leoniekraska.bsky.social and Tonni. See below Tonni's post!
June 25, 2025 at 5:34 PM Everybody can reply
1 reposts 9 likes
June 23, 2025 at 6:00 AM Everybody can reply
🌱Congratulations to Ines Hadj Bachir for receiving an @embo.org postdoctoral fellowship! 🎉 Her project on suberin regulation will be hosted in our lab at the University of Geneva. We’re excited to support her in this next chapter!
June 19, 2025 at 3:53 PM Everybody can reply
3 reposts 12 likes
This is a super cool paper linking the developmental stage gradient in the root to the mechanisms controlling suberin deposition! 👏

Have a look at Tonnis Thread explaining the highlights, and then read the paper in Cell Reports!

#PlantScience #PlantDevelopment #Suberin
June 9, 2025 at 7:06 AM Everybody can reply
2 reposts 8 likes
Leonie went all-in and described this change in suberin patterning - down to single cells along the entire root! - it took about 2 months of imaging to get this data and describe the pattern with such detail, but turns out that the effect is spatially restricted to certain cell files along the root
June 9, 2025 at 7:02 AM Everybody can reply
2 likes
This turned out to be a strong decrease in suberization of specifically the xylem pole-associated endodermis (XPE). A very exciting pattern, which may explain why suberin is a dynamic process that is always hard to describe correctly.
June 9, 2025 at 7:02 AM Everybody can reply
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Leonie wanted to find new regulators involved in a process called "suberization" - where the endodermal cells in the root close to minimize transport of molecules. She discovered that MYB68 - which is related to the Casparian strip regulator, had a peculiar pattern of suberin deposition when KOed:
June 9, 2025 at 7:02 AM Everybody can reply
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Check out our latest work, featuring beautiful, first-of-their-kind cryo-tomograms of crucial plant cell wall modifications, Casparian strips, suberin lamellae, lignified xylem walls and more! From our Electron Microscopy Facility led by @chgenoud.bsky.social

www.biorxiv.org/content/10.1...
Imaging of specialized plant cell walls by improved cryo-CLEM and cryo-electron tomography
Cryo-focused ion beam scanning electron microscopy (cryo-FIBSEM) has become essential for preparing electron-transparent lamellae from cryo-plunged and high-pressure frozen specimens. However, targeti...
www.biorxiv.org
June 5, 2025 at 12:00 AM Everybody can reply
25 reposts 1 quotes 48 likes