Ari Pekka Mähönen

Ari Pekka Mähönen

@apmahonen.bsky.social

Plant Developmental Biologist, Academy Professor at University of Helsinki. Funded by #ERCAdv, Novo Nordisk Fonden, CASS3 & #Treebio CoE Website: https://t.co/oFteNQ3WuH

1.5K followers484 following254 posts

Pinned

Ari Pekka Mähönen
@apmahonen.bsky.social

Latest from our lab! Detailed and committed work by Jennifer combined with Hiro's special skills👌. Wonderful collaboration with @nikogeldner.bsky.social lab (Damien and Etienne) and @jalonsos.bsky.social 👇

Jennifer Lopez Ortiz@jenlopezortiz.bsky.social

During secondary growth, primary protective barriers break, and a new one forms beneath: the phellem. But what triggers phellem to differentiate and become a functional barrier? Our results show it’s mechanical cues from tissue rupture 🌱 Check out our preprint 👇 www.biorxiv.org/content/10.6... 🧵/1

Ari Pekka Mähönen reposted

Craig Primmer
@fishcongen.bsky.social

Also candidates in any field within the biological and environmental sciences are encouraged to apply!

Tanja Pyhäjärvi@pyhatanja.bsky.social

University of Helsinki is hiring tenure track Assistant/Associate Professors. A main theme is Future Food and candidates with plant and crop breeding and genomics profile are encouraged to apply. Please share to potential candidates! The call closes November 16th. www.helsinki.fi/en/hilife-he...

helsinki.fiCall for HiLIFE tenure track Assistant/Associate Professor positions | HiLIFE – Helsinki Institute of Life Science | University of HelsinkiHiLIFE tenure track program aims to attract the most talented and motivated individuals. In the previous four calls HiLIFE has recruited 20 Assistant/Associate Professors, who to date have been able t...

Ari Pekka Mähönen reposted

Maria E. Eriksson
@treesandgrowth.bsky.social

Nice work from my colleagues! 🪵🌳#Plantsci Nitrate transiently rewires transcription in developing xylem of Populus wood to promote cell expansion via CRF4 academic.oup.com/plcell/artic...

academic.oup.comNitrate transiently rewires transcription in developing xylem of Populus wood to promote cell expansion via CRF4Abstract. Nitrate functions both as a nutrient and a signaling molecule, but how nitrate is perceived and translated into developmental outputs within wood

Ari Pekka Mähönen reposted

Sainsbury Laboratory Cambridge University (SLCU)
@slcuplants.bsky.social

And if this looks like fun research that you would like to be involved in, @mc-caillaud.bsky.social has 2 postdoc positions. Applications close: 1 November 2026

Sainsbury Laboratory Cambridge University (SLCU)@slcuplants.bsky.social

@mc-caillaud.bsky.social's talk at #SLS26 suggests actin-mediated regulation allows flexible implementation of a shared core strategy, favouring division perpendicular to the growth axis and symmetric partitioning, while avoiding lateral wall anchoring. www.ens-lyon.fr/RDP/signalis...

Ari Pekka Mähönen reposted

Daan Weits
@daanweits.bsky.social

Replying to @daanweits.bsky.social

Oxygen levels in leaves is a hot topic in @isplore.bsky.social and I'm very curious to find out how this all fits together! @djgibbs.bsky.social @drosborneplantsci.bsky.social @theplantlab.bsky.social @paolotriozzi.bsky.social pubmed.ncbi.nlm.nih.gov/40147448/ pubmed.ncbi.nlm.nih.gov/38243593/

sciencedirect.comVRN2-PRC2 facilitates light-triggered repression of PIF signaling to coordinate growth in ArabidopsisVERNALIZATION2 (VRN2) is a flowering plant-specific subunit of the polycomb-repressive complex 2 (PRC2), a conserved eukaryotic holoenzyme that repres…

Ari Pekka Mähönen reposted

Scandinavian Plant Physiology Society (SPPS)
@plantspps.bsky.social

🌱 Day 1 of #SPPS2026 in Helsinki. Our society is meeting at the University of Helsinki this week, and the first day set a high bar. Ari Pekka Mähönen opened the meeting and chaired the first session, impressively relaxed one minute in 😌👇 📷 Mats Hansson 🧵 1/7

Ari Pekka Mähönen reposted

GeminiTeamLab
@geminiteamlab.bsky.social

So excited and incredibly grateful for this opportunity! 🦠🌱🧬

Max Planck Institute for Plant Breeding Research@mpipz.bsky.social

🔬Big news🥳 We’re excited to welcome Prof. Dr. Rosa Lozano-Durán as new Director and head of the Department of Plant Virology @mpipz.bsky.social Her research focuses on how plant viruses interact with their hosts. 🎉Welcome to MPIPZ, Rosa 🌿🌱 www.mpipz.mpg.de/5842514/loza...

mpipz.mpg.deThe Max Planck Institute for Plant Breeding Research welcomes Prof. Dr. Rosa Lozano-Durán as new director

Ari Pekka Mähönen reposted

The Plant Cell
@theplantcell.bsky.social

IN BRIEF: What if… cytokinin meets auxin in developing roots? The story behind root ring formation (Luciano M Di Fino) doi.org/10.1093/plce... #PlantScience @aspbofficial

doi.orgWhat if… cytokinin meets auxin in developing roots? The story behind root ring formationAuxin–cytokinin antagonism is a core regulatory principle in plant development. In the root apical meristem, auxin maxima and gradients contribute to patte

Ari Pekka Mähönen reposted

PlantEvolution 🌱🌾
@plantevolution.bsky.social

Replying to @harmitmalik.bsky.social

A major advice I try to pass on: science is only worth it if you can delight in the discoveries of others. It’s great to make your own discoveries but they are too few to sustain you over the long haul.

Ari Pekka Mähönen reposted

Ursula von der Leyen
@vonderleyen.ec.europa.eu

Europe always chooses science and partnership. Japan too. Japan is now officially associated with Horizon Europe. This means Japanese researchers and organisations can take part in the world's largest public research and innovation programme. Let's break new frontiers together.

Ari Pekka Mähönen reposted

Bert De Rybel
@bertderybel.bsky.social

Happy to share our combined views on the opportunities and challenges in single-cell and spatial biology; collaborative work now out in @theplantcell.bsky.social : track.smtpsendmail.com/9032119/c?p=...

track.smtpsendmail.comDecoding plants cell by cell: opportunities and challenges in single-cell and spatial biologySingle-cell and spatial biology techniques present new opportunities for plant research, but also come with methodological considerations, technical limita

Ari Pekka Mähönen reposted

Yasin Dagdas
@plantophagy.bsky.social

@oeaw.bsky.social is searching for the next #director of @gmivienna.bsky.social ‼️It’s a huge opportunity to shape the future of #plantscience oeawnr.onlyfy.jobs/de/job/u3g5t...

oeawnr.onlyfy.jobsScientific Director (f/m/x)OeAW - Discovering the futureThe Gregor Mendel Institute of Molecular Plant Biology (GMI), part of the Austrian Academy of Sciences (OeAW), is seeking to appoint a visionary Scientific Director to lea

Ari Pekka Mähönen reposted

Rebecca Mosher
@rm0sher.bsky.social

Does anyone have a 3xFlag tag in the pGreengate system and would be willing to share a bit? 🙏 Please RT to claim your virtual belly rub opportunity:

Ari Pekka Mähönen reposted

Thomas Greb
@thomasgreb.bsky.social

In an heoric endeavor, Xiomin Liu, PhD student in the lab, characterized the dynamics and topology of the cell division machinery during cambium stem cell divisions. Super fruitful collaboration with the group of Sabine Müller (@phragmoplast.bsky.social). doi.org/10.1111/nph....

doi.orgThe preprophase band is dispensable for robust cell division orientation in wood‐forming cambium stem cellsCharacterization of periclinal and anticlinal cell divisions in dividing cambium stem cells (CSCs). (a) Scheme indicating periclinal and anticlinal cell divisions in CSCs in the Arabidopsis hypocotyl...

Ari Pekka Mähönen reposted

Michelle Facette
@mfacette.bsky.social

Come work with us!! We have a great group of plant biologists already, and there are FOUR searches for new plant biologists of different flavours across campus. We also have an outstanding group of animal physiologists (including @mstager.bsky.social ). Please apply!!

Maria Stager@mstager.bsky.social

Just a few days left to apply to our TT position in Plant Physiology in the Dept. of Biology @UMassAmherst! Join a great group of plant scientists (and physiologists 😉) AND fall in love with small town New England! Please repost. careers.umass.edu/amherst/en-u...

careers.umass.edu Details - Assistant Professor - Plant Physiology | Human Resources | UMass Amherst

Ari Pekka Mähönen reposted

Tonni Andersen
@tonnigrubeandersen.bsky.social

Time for another preprint from the lab: www.biorxiv.org/content/10.6... Led by @yuanyuanzhang.bsky.social and @defengshen.bsky.social. We found some surprising secrets that connect and uncouple root barrier formation with systemic nitrogen signaling in shoots. see the thread below for more details

biorxiv.orgA tunable receptor separates root barrier formation from nutrient signaling through ligand-perception statesIn roots, the endodermis controls nutrient entry by forming a barrier known as the Casparian strip. Yet how barrier-associated processes interface with systemic signaling remains unclear. Here, we sho...

Ari Pekka Mähönen reposted

Nick Talbot
@talbotlabtsl.bsky.social

PhD position in my group for entry in October 2026. Round 3 of the @nrpdtp.bsky.social BBSRC competition. Please RT👇 biodtp.norwichresearchpark.ac.uk/projects/van...

biodtp.norwichresearchpark.ac.ukVanishing Virulence: Investigating pathogenicity loss in a plant pathogenic fungus (TALBOT_S26DTP3) | Doctoral Training PartnershipWhat makes a plant killer lose its edge? This project will investigate why fungal pathogens lose virulence when they are grown in laboratory culture away from their host plant. Use cutting-edge…

Ari Pekka Mähönen reposted

Marc Somssich
@somssich.bsky.social

#PlantScienceClassics #6: The T-DNA. In a 1977 paper, Mary-Dell Chilton & colleagues identify the Transferred DNA (T-DNA), the bit of DNA that Agrobacterium tumefaciens inserts into the plant genome, to kick off the race toward the first transgenic plant. doi.org/10.1016/0092...

Ari Pekka Mähönen
@apmahonen.bsky.social

I am incredibly excited and grateful to have received an ERC Advanced Grant for my project, WOODIER: What Makes Trees Woody! 🌳 This award feels like the culmination of many years of work carried out in our research group, and the biggest thanks go to my lab members. bsky.app/profile/erc.... 1/x

European Research Council (ERC)@erc.europa.eu

The results of the Advanced Grants 2025 are here! Out of 3,329 applicants, 319 leading researchers have been awarded an ERC Advanced Grant. Congratulations to all! 🎉 Curious to know more ? 👉 buff.ly/uiU9x5K #ERCAdG #FrontierResearch

View full thread
Ari Pekka Mähönen
@apmahonen.bsky.social

Now we are ready to take the next step. Unlike herbaceous Arabidopsis, trees produce proportionally much more wood than phloem because they need the extra wood to support their massive stems and branches. 6/x

Ari Pekka Mähönen
@apmahonen.bsky.social

In WOODIER, we will investigate how aspen trees generate this excess wood and how the dynamics of wood formation change across the seasons. I can't wait to get started. Open positions available soon! 7/7

Ari Pekka Mähönen
@apmahonen.bsky.social

I am incredibly excited and grateful to have received an ERC Advanced Grant for my project, WOODIER: What Makes Trees Woody! 🌳 This award feels like the culmination of many years of work carried out in our research group, and the biggest thanks go to my lab members. bsky.app/profile/erc.... 1/x

European Research Council (ERC)@erc.europa.eu

The results of the Advanced Grants 2025 are here! Out of 3,329 applicants, 319 leading researchers have been awarded an ERC Advanced Grant. Congratulations to all! 🎉 Curious to know more ? 👉 buff.ly/uiU9x5K #ERCAdG #FrontierResearch

View full thread
Ari Pekka Mähönen
@apmahonen.bsky.social

So, what is WOODIER about? Over the years, our group has focused on understanding how the vascular cambium produces wood and phloem in Arabidopsis. This work has given us a detailed understanding of the molecular mechanisms that drive vascular tissue formation. 5/x

Ari Pekka Mähönen
@apmahonen.bsky.social

I am incredibly excited and grateful to have received an ERC Advanced Grant for my project, WOODIER: What Makes Trees Woody! 🌳 This award feels like the culmination of many years of work carried out in our research group, and the biggest thanks go to my lab members. bsky.app/profile/erc.... 1/x

European Research Council (ERC)@erc.europa.eu

The results of the Advanced Grants 2025 are here! Out of 3,329 applicants, 319 leading researchers have been awarded an ERC Advanced Grant. Congratulations to all! 🎉 Curious to know more ? 👉 buff.ly/uiU9x5K #ERCAdG #FrontierResearch

Ari Pekka Mähönen
@apmahonen.bsky.social

Their hard work, creativity, and willingness to tackle difficult questions have made this possible. I feel very fortunate to work with such a talented team and to be part of a lab with such a positive and collaborative spirit. 2/x

Ari Pekka Mähönen
@apmahonen.bsky.social

I would also like to thank the many people who have supported me along the way: my mentors for their wisdom, grant coaches and administrators for their invaluable help, and colleagues who served on mock panels and challenged me with constructive criticism. 3/x

Ari Pekka Mähönen reposted

Tanja Pyhäjärvi
@pyhatanja.bsky.social

We are looking for a PhD researcher to work for the “ClimatePine” -project, conducted in collaboration among Natural Resources Institute Finland, Metsähallitus Forestry Ltd and University of Helsinki. More info: valtiolle.fi/en/jobs/rese...

valtiolle.fiResearch Scientist, doctoral researcher, forest breeding - Natural Resources Institute FinlandOpen job: Research Scientist, doctoral researcher, forest breeding, Natural Resources Institute Finland - Find all jobs in Valtiolle.fi
Ari Pekka Mähönen
@apmahonen.bsky.social

Fantastic work from the Etchells lab! And a great 🧵 too!

Peter Etchells@peteretchells.bsky.social

Really pleased to see Qing He’s work out in its final form (www.pnas.org/doi/epdf/10....). My group had previously shown that PXY-mediated regulation of cambium development had an ERECTA-mediated influence, but we didn’t understand the mechanism. 🧵

pnas.orgPNASProceedings 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...