Ari Pekka Mähönen
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apmahonen.bsky.social
Ari Pekka Mähönen
@apmahonen.bsky.social
Plant Developmental Biologist, Professor at
University of Helsinki. Funded by #ERCCoG & #Treebio CoE
Website: https://t.co/oFteNQ3WuH
Pinned
🌱 What happens when lateral root primordia (LRPs) fail to emerge?
Using our new lineage tracing tool LRTracker, Xin discovered that arrested LRPs don’t just disappear—they gradually switch fate and become part of the cambium, contributing to secondary growth.1/x
www.sciencedirect.com/science/arti...
Hormonal regulation of cell fate plasticity of xylem-pole-pericycle lineage in Arabidopsis roots
In Arabidopsis roots, xylem-pole-pericycle (XPP) cells exhibit dual cell fates by contributing to both lateral root (LR) and cambium formation. Despit…
www.sciencedirect.com
There is a thin line between poison and medicine.
You say I’m trying to poison my lab with ammonium chloride. I say I’m just offering up some Finnish treats.
November 4, 2025 at 5:01 PM
Reposted by Ari Pekka Mähönen
Our work on mapping the dynamics of phospholipids during lateral root formation is now published in @jxbotany.bsky.social We show that PI(4,5)P₂ plays a key role: targeted reduction in pericycle promotes LR development.
academic.oup.com/jxb/advance-...
November 4, 2025 at 9:19 AM
Incredible news! I’ve been awarded the Academy Professorship for 2026–2031. I’m deeply grateful to my group members and colleagues for their invaluable contributions that made this possible. @helsinki.fi @treebiocoe.bsky.social www.aka.fi/en/about-the...
Research Council of Finland selects 15 new Academy Professors
The Research Council of Finland (RCF) has decided on funding for 15 new Academy Professorships for the period 1 January 2026–31 December 2031. The revised Academy Professorship funding scheme pr...
www.aka.fi
October 30, 2025 at 9:04 PM
Reposted by Ari Pekka Mähönen
"Remember, nice, normal, sensible people still outnumber the screaming loons. Social media sometimes gives a very depressing & scary false assessment. Have a lovely day. Here’s a cat."

- Ricky Gervais, 2021

#MenWithCats
October 24, 2025 at 9:55 PM
Final, edited version of the paper now available
www.sciencedirect.com/science/arti...
October 25, 2025 at 12:27 PM
Reposted by Ari Pekka Mähönen
We have a project available for 2026 NRP Doctoral Training Partnership entry (i.e. PhD studentship opportunity!)

How do cells communicate when it's hot?

Don't know? Me either! Come work with us @johninnescentre.bsky.social and figure it out

biodtp.norwichresearchpark.ac.uk/projects/how...
How do cells communicate when it’s hot? (FAULKNER_J26DTP) | Doctoral Training Partnership
Plant cells are connected to their neighbours via ‘tubes’ called plasmodesmata, creating an interconnected cytoplasm that joins cells within and between tissues and organs.
biodtp.norwichresearchpark.ac.uk
October 12, 2025 at 11:48 AM
Reposted by Ari Pekka Mähönen
#TansleyReview: An updated history of TDIF-PXY signalling: a study in cell fate and tissue patterning

He et al. 👇

📖 nph.onlinelibrary.wiley.com/doi/10.1111/...

#LatestIssue #PlantScience
October 5, 2025 at 11:23 AM
Reposted by Ari Pekka Mähönen
This story blew my mind! Amazing work. Highly recommended. Congrats to all! @nikogeldner.bsky.social @tonnigrubeandersen.bsky.social

Localized glutamine leakage drives the spatial structure of root microbial colonization | Science www.science.org/doi/10.1126/...
Localized glutamine leakage drives the spatial structure of root microbial colonization
Plant roots release exudates to encourage microbiome assembly, which influences the function and stress resilience of plants. How specific exudates drive spatial colonization patterns remains largely ...
www.science.org
October 3, 2025 at 6:35 AM
Reposted by Ari Pekka Mähönen
Humane genetics and genomics position in Helsinki open for 9 more days!
3 prof positions open in Helsinki!

🧬Human genetics and genomics (open rank, DL 10.10)
🧬Cellular physiology (TT, DL 17.8)
🏙️ Ecological restoration of urban environments (open rank, DL 17.8)

www.helsinki.fi/en/about-us/...

Come and join us in the happiest country in the world 5 years running!
Open positions | University of Helsinki
Read about our range of career options and apply now. Application processes ends on the date indicated in the job ad at 23.59 local Helsinki time (EEST).
www.helsinki.fi
October 1, 2025 at 6:59 PM
Reposted by Ari Pekka Mähönen
🐰 RABBIT EARS directly regulates WOX4 transcription and inhibits secondary growth in #Arabidopsis stem

📖 buff.ly/0thfFIy
by Thapa Chhetri et al.

@WileyPlantSci #PlantScience #cambium
Identification of a rbe-d mutant with reduced secondary growth.
nph.onlinelibrary.wiley.com
October 1, 2025 at 11:06 AM
Webinar on Quantitative Approaches to Cellular Aspects of Plant Ion Homeostasis on Thursday October 16th: 3-4pm BST
www.cambridge.org/core/journal...
October 1, 2025 at 10:34 AM
Reposted by Ari Pekka Mähönen
Check out our new review in JXB:
tinyurl.com/yta6fd5b

@pablidopsis.bsky.social and I write about the cell's decision between division and differentiation. 🌱 What factors promote one or the other in different cell types? 🤔 Are they really mutually exclusive?
Validate User
tinyurl.com
October 1, 2025 at 8:55 AM
Reposted by Ari Pekka Mähönen
Amazing work by the Santiago lab @unil.bsky.social. The malectin-LRR receptor kinase IGP1 senses cello-oligomers to alert the plant immune system & enhance disease resistance. Very nice discovery & mechanism.
www.biorxiv.org/content/10.1...
September 30, 2025 at 2:18 PM
Reposted by Ari Pekka Mähönen
This looks like a great opportunity: #Tenure-track assistant #professor position at University of Lausanne on #MPMI
career5.successfactors.eu/career?caree...
Career Opportunities: DBMV: Tenure Track Assistant Professor towards Associate Professor in the field of Plant-organism (22484)
career5.successfactors.eu
September 17, 2025 at 1:01 PM
Reposted by Ari Pekka Mähönen
Oxford Biology is growing 📢

We’re appointing 3 Associate Professors in:
🌱 Plant Sciences
🦉 Animal Behaviour
🔬 Molecular Cell Biology

3 fields. 3 opportunities. One new home for Oxford Biology.

Learn more 👉 bit.ly/41S2Tc7
Apply now 👉 bit.ly/488CNW3
September 15, 2025 at 8:20 AM
🌱 What happens when lateral root primordia (LRPs) fail to emerge?
Using our new lineage tracing tool LRTracker, Xin discovered that arrested LRPs don’t just disappear—they gradually switch fate and become part of the cambium, contributing to secondary growth.1/x
www.sciencedirect.com/science/arti...
Hormonal regulation of cell fate plasticity of xylem-pole-pericycle lineage in Arabidopsis roots
In Arabidopsis roots, xylem-pole-pericycle (XPP) cells exhibit dual cell fates by contributing to both lateral root (LR) and cambium formation. Despit…
www.sciencedirect.com
September 12, 2025 at 1:59 PM
Reposted by Ari Pekka Mähönen
We have two open Post-Doc positions in my group at the interface with:
1- @ataly.bsky.social for molecular dynamics
2- Bruno Guillotin from protein mobility

Apply by sending CV, two ref letters and a short motivation letter to me : emmanuelle.bayer@u-bordeaux.fr. Deadline 15 sept.
July 28, 2025 at 8:43 AM
Timely review by Peter and colleagues on TDIF-PXY signalling!
August 30, 2025 at 2:00 PM
Reposted by Ari Pekka Mähönen
We are recruiting‼️A permanent university lecturer position in BIOSTATISTICS is available at @helsinki.fi Faculty of Biological and Environmental Sciences. Great colleagues, excellent infrastructures and startup support 🙌🏻
DL 14 September

jobs.helsinki.fi/job/Helsinki...
University Lecturer in Biostatistics
University Lecturer in Biostatistics
jobs.helsinki.fi
August 26, 2025 at 11:01 AM
Reposted by Ari Pekka Mähönen
An open W2 Professorship position in Molecular Crop Improvement at my Institute @uni-muenster.de! Excellent scientific environment and great conditions for Plant Research 🔬🍅🫛🥒🌽🍓🍎🥔- now open for applications !
Your research brings together fundamental plant biology & applied research to enhance crop traits? 🌱🌾🎓🏭

Join us as professor in 'Molecular Crop Improvement' @uni-muenster.de & @fraunhofer.bsky.social

Please PM if you got questions.

stellen.uni-muenster.de/jobposting/d...
Professorship (W2-level) in “Molecular Crop Improvement”
stellen.uni-muenster.de
August 18, 2025 at 3:39 PM
Reposted by Ari Pekka Mähönen
A snapshot of the mechanics shaping organs: what plants and animals can teach each other.
Thank you Mabel, @MabelMathew_M and Ankita @Dash_Ankita
for putting this together.

authors.elsevier.com/a/1lamy3si8Q...
authors.elsevier.com
August 12, 2025 at 7:20 AM
Reposted by Ari Pekka Mähönen
Free-to-read version here👇 rdcu.be/ey7yj
August 4, 2025 at 10:09 AM