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Vinod Kumar

@sharmavinod.bsky.social
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Reposted by Vinod Kumar
Stéphanie Robert @srobertgroup.bsky.social · 03/07/2026
The latest paper of the group on pavement cell shape acquisition! Work from @sandeep18887.bsky.social @sharmavinod.bsky.social @adrienheymans.bsky.social @petergrones.bsky.social in collaboration with @cellwalldynamics.com @umeaplantsciencecentre.se pubmed.ncbi.nlm.nih.gov/42381545/
pubmed.ncbi.nlm.nih.gov
The primary beta-galactosidase BGAL10 modulates pavement cell shape acquisition in Arabidopsis - PubMed
Cell shape acquisition is a fundamental biological process that allows cells to establish and maintain morphologies adapted to their specialised functions while preserving tissue integrity. In plants,...
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Stéphanie Robert @srobertgroup.bsky.social · 30/06/2026
Such an honor to have been elected as an EMBO member and I am looking forward to contribute to the EMBO community! I got spoiled by my fantastic group today! @embo.org
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Stéphanie Robert @srobertgroup.bsky.social · 23/06/2026
Celebration of paper acceptances!! Details will come later! @sandeep18887.bsky.social on the phone :-) @siamsadoyle.bsky.social @lorindaloi.bsky.social @sharmavinod.bsky.social @absolutemaverick.bsky.social @loupitgreg.bsky.social @rahulpvnewland.bsky.social @umeaplantsciencecentre.se
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EMBO Reports @emboreports.org · 29/05/2026
Second May issue is live! link.springer.com/journal/4431... The cover features work by Mateusz Majda @matmajda.bsky.social and Richard S Smith @johninnescentre.bsky.social showing that puzzle cells transform cell geometry into a living record of how leaves grow. link.springer.com/article/10.1...
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Stéphanie Robert @srobertgroup.bsky.social · 08/05/2026
Our new berry boxes (v2) made by labstuce.com and @absolutemaverick.bsky.social !! Let's the fun begin!
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Heike Lindner @heikelindner.bsky.social · 25/03/2026
Our first Kalanchoë laxiflora story found its perfect home @Science Advances with a beautiful cover image of Kalanchoë thyrsiflora leaves. I am grateful that I can continue working with this incredible new model to learn more about succulent development 🤩 www.science.org/doi/10.1126/...
The picture shows Kalanchoë thyrsiflora leaf margins
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Stéphanie Robert @srobertgroup.bsky.social · 18/03/2026
FATE annual in person meeting! This time in Umeå! Nice day of interdisciplinary science! @stephanevrg.bsky.social @lorindaloi.bsky.social @pmarhavy.bsky.social @kawresearch.bsky.social @uu.se @umeaplantsciencecentre.se @liu.se
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Stéphanie Robert @srobertgroup.bsky.social · 25/03/2026
Our latest review on pavement cell shape acquisition is on line! Work from @lorindaloi.bsky.social @sharmavinod.bsky.social @absolutemaverick.bsky.social @kawresearch.bsky.social @erc.europa.eu Kempe fondation Vetenskapsrådet (VR) MSCA www.sciencedirect.com/science/arti...
sciencedirect.com
The art of interdigitation: Current views on pavement cell shape acquisition
Cell shape acquisition is a central feature of morphogenesis, governing tissue organization, organ development, and organismal architecture. In vascul…
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Stéphanie Robert @srobertgroup.bsky.social · 11/02/2026
Spotted from the road! Umeå has some beautiful winter days right now. The reindeers just bring the magic! @umeaplantsciencecentre.se
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Stéphanie Robert @srobertgroup.bsky.social · 06/02/2026
Exciting imaging ahead #Zeiss #microscopy @erc.europa.eu @starmorph-syg.bsky.social
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Umeå Plant Science Centre @umeaplantsciencecentre.se · 16/01/2026
🧪🌾 PAPER – How do trees know when winter is really over? Trees don’t just track long-term cold exposure. The Bhalerao group and collaborators show they also count short warm spells when assessing winter progression. Read more in @natcomms.nature.com:👇 www.nature.com/articles/s41...
nature.com
Variable temperature processing by plasmodesmata regulates robust bud dormancy release - Nature Communications
Tree buds integrate cold and warm cues to control dormancy release. Extended warm periods block plasmodesmata opening by repressing Flowering Locus T and GA pathways in buds. This mechanism ensures ro...
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Stéphanie Robert @srobertgroup.bsky.social · 16/01/2026
It was such a pleasure to have Edwige Moyroud from @slcuplants.bsky.social visiting @umeaplantsciencecentre.se She acted as external evaluator for @absolutemaverick.bsky.social Hemamshu Ratnakaram half time seminar and we could enjoyed her fascinating research overview. Thanks Edwige!
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Stéphanie Robert @srobertgroup.bsky.social · 12/01/2026
Entering 2026 with the latest group picture. @loupitgreg.bsky.social is missing. We had two great bachelor students for a few weeks Jule Braha and Mélio Dagnaud-Adam! @siamsadoyle.bsky.social @sharmavinod.bsky.social @lorindaloi.bsky.social @rahulpvnewland.bsky.social @absolutemaverick.bsky.social
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Stéphanie Robert @srobertgroup.bsky.social · 05/12/2025
Ice bath before Julbord, enjoying the sun when it is still out! Perfect end of the week with this fantastic group! @siamsadoyle.bsky.social @sharmavinod.bsky.social @rahulpvnewland.bsky.social @absolutemaverick.bsky.social @lorindaloi.bsky.social @loupitgreg.bsky.social
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Umeå Plant Science Centre @umeaplantsciencecentre.se · 03/12/2025
🎉 Congratulations to @cathbell62.bsky.social! 🎉 She has been awarded the Roséns Linnaeus Prize in Botany for her research on plant roots and carbon allocation, and for promoting international collaboration in science, especially the #INUPRAG collaboration.🧪🌾 Read more: www.upsc.se/about-upsc/n...
A women with short brown hair is smiling into the camera. She wears a white jacket and a colourful scarf. Her hair is brightened up by some sunshine.
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Ari Pekka Mähönen @apmahonen.bsky.social · 14/11/2025
By combining molecular genetics with cell-ablation experiments, we found that vascular cambium stem cells and xylem-identity cells form an interchangeable unit, a stem cell niche. Meticulous work by @xixizhang9001.bsky.social, Ondrej Smetana, Jing Zhang & Xiaoyu Wang 1/x www.pnas.org/doi/10.1073/...
pnas.org
Auxin transport positions stem cells in the vascular cambium during normal development and regeneration | PNAS
The vascular cambium contains bifacial stem cells producing secondary phloem in one and secondary xylem to the opposite direction. In Arabidopsis r...
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European Commission @ec.europa.eu · 07/11/2025
#OnThisDay, the first woman to win a Nobel Prize was born: Marie Skłodowska-Curie. Today, the MSCActions 🇪🇺 fellowship carries her name, supporting young scientists in their research.  Together, we’re building a brighter future for generations to come.
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Stéphanie Robert @srobertgroup.bsky.social · 17/10/2025
@marhava.bsky.social and myself have edited a special issue on Auxin for Physiologia plantarum! Have a look at the nice contributions! @umeaplantsciencecentre.se onlinelibrary.wiley.com/doi/toc/10.1...
onlinelibrary.wiley.com
The A to Z of Auxin in Plant Development: Physiologia Plantarum
Click on the title to browse this issue
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Stéphanie Robert @srobertgroup.bsky.social · 23/09/2025
Having fun with the group for Sandeep Farewell! @sharmavinod.bsky.social @siamsadoyle.bsky.social @loupitgreg.bsky.social @sandeep18887.bsky.social @absolutemaverick.bsky.social @umeaplantsciencecentre.se
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STARMORPH_ERC SYG @starmorph-syg.bsky.social · 03/09/2025
STARMORPH kick off went smoothly! Nice group of young scientists to work together with! Fantastic couple of days! @xanderjones.bsky.social @kleinevehnlab.bsky.social @nowako76.bsky.social @srobertgroup.bsky.social @erc.europa.eu @umeaplantsciencecentre.se
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Stéphanie Robert @srobertgroup.bsky.social · 23/07/2025
Summer vibes! @siamsadoyle.bsky.social @sharmavinod.bsky.social @sandeep18887.bsky.social @adrienheymans.bsky.social @loupitgreg.bsky.social Lorinda, Lin and Hemamshu! @umeaplantsciencecentre.se
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Stéphanie Robert @srobertgroup.bsky.social · 22/07/2025
Please find our latest paper in @pnas.org. Lots of work from a fantastic group: Qian Ma, Sijia Liu, @siamsadoyle.bsky.social , Sara Raggi and others including @luciastrader.bsky.social @erc.europa.eu @kawresearch.bsky.social @umeaplantsciencecentre.se www.pnas.org/doi/10.1073/...
pnas.org
RACK1A positively regulates opening of the apical hook in Arabidopsis thaliana via suppression of its auxin response gradient | PNAS
Apical hook development is an ideal model for studying differential growth in plants and is controlled by complex phytohormonal crosstalk, with aux...
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Stéphanie Robert @srobertgroup.bsky.social · 11/07/2025
Escape game in the city of Umeå! @umeaplantsciencecentre.se
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Umeå Plant Science Centre @umeaplantsciencecentre.se · 05/06/2025
REVIEW - What is the mechanistic link between auxin signaling and cell wall dynamics in shaping plant cells? Vinod Kumar et al from the @srobertgroup.bsky.social explore this link in their recent review published last week in @pplplantarum.bsky.social. Follow the below link 👇 to find the article!
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Adrien Heymans @adrienheymans.bsky.social · 30/05/2025
🌱🧩 How do plant cells get their shape? 🧪 Check out the new #open-access #review exploring the mechanochemical duet between auxin & the cell wall in shaping diverse plant cell types from @srobertgroup.bsky.social's Lab. 🔗 doi.org/10.1111/ppl.... #PlantBiology #CellShape #Auxin #Biomechanics
Epidermal cells acquire different cell shapes to enable their functions and maintain tissue integrity in plants. Meristematic cells differentiate and expand into diverse mature cell types, including jigsaw puzzle-shaped pavement cells (a), round stomatal guard cells (b), elongated epidermal cells in hypocotyls and the apical hook (c), and root epidermal cells with root hairs (d). The spatial distribution and arrangement of cell wall polysaccharides, such as cellulose microfibrils, xyloglucans, and pectins (e.g., homogalacturonan represent as HG), and the abundance of methylester groups on these components in differentiating cells regulate anisotropy during cell growth, enabling the acquisition of specific cell shapes. In addition, proteins like KATANIN and CLASP reorient dynamically the cortical microtubules. These cortical microtubules rearrangement is in response to mechanical cues, either self-generated (as in b, c) or from neighboring cells (a, c), leading to the resulting cell shape.

Attribution-NonCommercial-NoDerivatives 4.0 International

Auxin controls cell expansion by regulating cell wall biosynthesis and cell remodeling. Auxin promotes cell expansion by acidifying the cell wall and activating wall synthesis and loosening enzymes. Auxin efflux (PINs) and influx (AUX1) transporters establish concentration gradients in growing tissue. Auxin enters cells via influx transporters and activates the TRANSPORT INHIBITOR RESPONSE 1/AUXIN SIGNALING F-BOX PROTEINS-AUXIN/INDOLE ACETIC ACID (TIR1/AFB-Aux/IAA) nuclear signaling cascade, which regulates auxin-responsive genes, including AUXIN RESPONSE FACTORs (ARFs) and SMALL AUXIN UP RNAs (SAURs). Auxin activates the H+-ATPase proton pump through TRANSMEMBRANE KINASE 1 (TMK1), acidifying the cell wall and triggering loosening enzymes including PECTIN METHYLESTERASEs (PMEs), EXPANSINs, and XYLOGLUCAN:XYLOGLUCOSYL TRANSFERASEs (EXTs). Cellulose microfibrils are synthesized by the plasma membrane-bound cellulose synthase complex (CSC), with cortical microtubules guiding the exocytosis of this complex toward expanding cell edges. Auxin coordinates the reorientation of cortical microtubules and actin filaments to regulate the trafficking of cell wall polysaccharides to ensure proper cell wall expansion and specific cell shape acquisition.

Attribution-NonCommercial-NoDerivatives 4.0 International
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Stéphanie Robert @srobertgroup.bsky.social · 20/05/2025
SLU leadership course in the south! Alnarp campus hits differently 💚💚💚💚
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Umeå Plant Science Centre @umeaplantsciencecentre.se · 24/04/2025
After a long and very successful career our plant cell wall expert Professor Ewa Mellerowicz is retiring. Ewa mentored & inspired many young scientists and her contributions to wood biology research are invaluable. Thank you for everything, Ewa, and all the best for the next chapter in your life!👏
A women is standing on a green field with young aspen trees.
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Stéphanie Robert @srobertgroup.bsky.social · 13/04/2025
Spontaneous group day, swimming in the sea! Very nice day, only @siamsadoyle.bsky.social and @adrienheymans.bsky.social were missing! @sharmavinod.bsky.social @sandeep18887.bsky.social Lorinda, Hemamshu, Grégoire and Lin!
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Adrien Heymans @adrienheymans.bsky.social · 11/04/2025
🧫Does anyone know of database for 2D plant anatomical data? I’m especially thinking of datasets from: CellSeT, Icy (.xml) or .zip ImageJ ROIs (e.g., via Celer, PaCeQuant, Cellpose, etc.) Something like what’s being done with ggPlantMap would be amazing! #PlantScience #OpenScience
2D plant anatomy data

Pavement cells from Arabidopsis
Root cross section (Pascut et al., 2021: https://doi.org/10.1038/s41467-021-24913-z)
root tip (https://www.future-science.com/doi/10.2144/000114621)
Embryo (https://doi.org/10.1111/nph.12267)
Lateral root emergence (https://doi.org/10.3389/fpls.2019.00206)
Inflorescence stem cross section (https://academic.oup.com/plcell/article/33/2/200/6017181)

ggplantmap @leonardojo.bsky.social (Leonardo and Kajala, 2024: https://doi.org/10.1093/jxb/erae043)
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Adrien Heymans @adrienheymans.bsky.social · 07/04/2025
New preprint from @stephanevrg.bsky.social 's lab! 🧪 Simulations + mutant tests show a shift in how we think about plant cell adhesion, challenging "textbook" view on the role of middle lamella. 📄 doi.org/10.1101/2025... Thank you Özer Erguvan and all co-authors 🔬 #PlantSci #CellBiology
FEM and TEM reveal the process by which cell separation may initiate in the outer epidermal edge filling (OEEF) and propagate to the supracellular outer epidermal wall FEM and TEM reveal the process by which cell separation may initiate in the outer epidermal edge filling (OEEF) and propagate to the supracellular outer epidermal wall (SOEW).
CC-BY-NC-ND 4.0 International license.
(which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is
bioRxiv preprint doi: https://doi.org/10.1101/2025.04.03.646819; this version posted April 6, 2025.
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Yoselin Benitez-Alfonso @yoselin.bsky.social · 28/03/2025
It was really great to host UK Plant Biomechanics today. Big thanks to @instituteofphysics.bsky.social and Viv especially for all their help!!! A photo from today!
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Stéphanie Robert @srobertgroup.bsky.social · 25/03/2025
Tonight show was insane! Just in time for our UPSC Symposium for Early Career Plant Scientists 2025 @umeaplantscicentre.bsky.social www.upsc.se/calendar/227...
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Stéphanie Robert @srobertgroup.bsky.social · 13/03/2025
SLU makes collages of their research images to use for marketing and decoration. Our image has been featured – can you spot it? To the left of the collage you can see stomata, mesophyll and pavement cells of a leaf from one of our research images taken by @siamsadoyle.bsky.social
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