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Sjon Hartman @hartman-plantlab.com · 27/09/2026

Happy to be in Bordeaux to start what feels like a 2-week European tour and showcase our work on flooding stress memory in #plantscience and more of our latest results! Looking forward to 3 days of RECROP, and hoping to see results that can promote climate-related stress resilience in plants.

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Sjon Hartman @hartman-plantlab.com · 28/08/2026

Tenure documents submitted 🤞🏼 After work drinks and snacks with the lab to celebrate 🥂

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Sjon Hartman @hartman-plantlab.com · 25/07/2026

We're over 200 km east from there and still covered in the smokey clouds, giving a sense of the magnitude 😔

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Sjon Hartman @hartman-plantlab.com · 14/07/2026

Super cool paper but I would have maybe picked another GO terms 🫠

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Sjon Hartman @hartman-plantlab.com · 02/07/2026

You know I love #plantscience but I really love watching these guys 😍😎

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Sjon Hartman @hartman-plantlab.com · 01/07/2026

We also joined this year's sporty #B2Run Freiburg event under the @uni-freiburg.de flag with most of team 👟🌱🌊 It was such a fun evening! Well done to everyone. I guess now we "deserve" to also tag along for the upcoming Freiburg annual wine-fest 😜🍷

Lab group photo after the B2Run Freiburg charity running event.

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Sjon Hartman @hartman-plantlab.com · 18/06/2026

Time for an ice cream break with the lab, before the heatwave really kicks in the coming days 🥵🍦🍧

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Sjon Hartman @hartman-plantlab.com · 03/06/2026

@carlos-rc.bsky.social together with @rimchaudhury15.bsky.social designed this figure describing some of the key temporal signalling events during a flooding event that were shown to contribute to differential stress resilience 🌱🌊 #plantscience

Circular schematic illustrating signalling events before, during and after plant submergence. The figure is divided into three interconnected phases arranged around a central ring labeled “Acclimation,” “Submergence,” and “Recovery,” with ethylene (Et) positioned at the center as a key regulator. The upper left region “Acclimation” depicts environmental flooding anticipation cues, including rain, waterlogging, humidity, and mechano-stimulation, leading to activation of EIN3 signalling. The upper right half, labeled as “Hypoxia,” represents submerged conditions with blue shading. Ethylene signalling through EIN2 stabilizes EIN3 and promotes accumulation of PGB1, which limits nitric oxide (NO)-dependent degradation of ERFVII transcription factors. Translation is globally repressed while stress-induced mRNA translation is promoted through GCN2. Sugar-dependent TOR signalling phosphorylates ERFVII, enabling interaction with MED25 and RNA polymerase II to activate hypoxia-responsive genes (HRGs). EIN3 also promotes ORE1-mediated senescence in old leaves, while miR164 suppresses ORE1 activity in young leaves. The lower left recovery section, shaded yellow, depicts re-oxygenation after flooding. Oxygen and hydrogen peroxide generated during a reactive oxygen species (ROS) burst stabilize ERFVII and activate oxidative stress-responsive genes (ORGs) while repressing HRGs. Ethylene signalling is attenuated through EBF-mediated ubiquitin–proteasome system (UPS) degradation and autophagic turnover of EIN3. Curved arrows around the outer circle indicate progression through flooding, hypoxia, and recovery, emphasizing that these signalling events are overlapping and interconnected rather than strictly linear.

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Sjon Hartman @hartman-plantlab.com · 29/05/2026

Had a great time visiting @uni-goettingen.de, giving a talk about our ongoing #plantscience memory work (see preprint) and discussing ongoing and new projects and more. Thanks to Salma for the invitation 🌱 doi.org/10.64898/202...

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Sjon Hartman @hartman-plantlab.com · 06/05/2026

It's a special week of firsts. I never really imagined doing this until last year, but we also started our first field trial with a local farmer and consortium, supported by @mwk-bw.bsky.social 🌽🌾 Super exciting! #plantscience

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Sjon Hartman @hartman-plantlab.com · 05/05/2026

Through transcriptome and H3K27me3 profiling, we identified two VRN2-dependent processes exhibiting transcriptional memory: anthocyanin accumulation and delayed leaf senescence, both promoting flooding resilience.

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Sjon Hartman @hartman-plantlab.com · 05/05/2026

Angiosperms evolved an oxygen-sensitive PRC2 subunit: VRN2. We show that vrn2 mutants no longer benefit from submergence priming, suggesting that flooding stress memory is controlled by VRN2. www.nature.com/articles/s41...

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Sjon Hartman @hartman-plantlab.com · 27/03/2026

Super proud of the team organizing this year's @dompsfr.bsky.social #plantscience symposium 🌱 We had a blast!

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Sjon Hartman @hartman-plantlab.com · 27/03/2026

Our second keynote @likeyoda1.bsky.social gave a stellar talk on stomatal patterning in the Arabidopsis embryo 🌱

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Sjon Hartman @hartman-plantlab.com · 27/03/2026

A strong but thought-provoking statement by Malcolm Bennett on the 3rd day of our @dompsfr.bsky.social symposium. Perfect primer for lots of #plantscience discussion today 🌱

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Sjon Hartman @hartman-plantlab.com · 25/03/2026

Opening of this year's @dompsfr.bsky.social Symposium by @kevindaniel.bsky.social and @advaitagashe.bsky.social 🌱 Look forward to an exciting 3 days for our @biologyunifreiburg.bsky.social #plantscience community 👍🏻

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Sjon Hartman @hartman-plantlab.com · 17/03/2026

Lovely group lunch today with a delicious veggie lasagna by @isabellembke.bsky.social and tiramisu by MSc student Sarah Fichtler 🤤 We're a lucky bunch!

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Sjon Hartman @hartman-plantlab.com · 09/02/2026

Excited for 2 days of @episeedlink.bsky.social conference on Priming and Epigenetic Stress Memory in #plantscience in Amsterdam! The stage is set with a watergun for speakers going overtime 😳💦

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Sjon Hartman @hartman-plantlab.com · 13/12/2025

End of the year celebrations with lab 🎄🎊

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Sjon Hartman @hartman-plantlab.com · 02/12/2025

It's that time of the year! Freiburg Christmas market with lab 🎄🎉❄️ What a fantastic team we have 🥹

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Sjon Hartman @hartman-plantlab.com · 20/11/2025

Awesome! Greetings from the lake!

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Sjon Hartman @hartman-plantlab.com · 20/10/2025

Happy #Diwali from our team at @biologyunifreiburg.bsky.social! @advaitagashe.bsky.social prepared a traditional breakfast meal for us this morning 😊👍🏻🏵️🌸

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Sjon Hartman @hartman-plantlab.com · 10/10/2025

Goodbye Japan, you are beautiful 🇯🇵❤️

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Sjon Hartman @hartman-plantlab.com · 26/09/2025

And what a fantastic edition of #ISPLORE2025JP it was! Really had a wonderful time discussing science, meeting old friends and making new and enjoying the local cuisine 🌱🍣

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Sjon Hartman @hartman-plantlab.com · 26/09/2025

So proud of @rimchaudhury15.bsky.social for winning best oral presentation award at #ISPLORE2025JP 🥇🤗☔🌱

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Sjon Hartman @hartman-plantlab.com · 22/09/2025

We made made it with the team to #ISPLORE2025JP 🌱🌊

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Sjon Hartman @hartman-plantlab.com · 21/09/2025

We're almost there and growing in numbers.. but lost @advaitagashe.bsky.social 🤔 #ISPLORE2025JP

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Sjon Hartman @hartman-plantlab.com · 20/09/2025

On our way to #ISPLORE2025JP in Nagoya 🌱🌊 Looking forward to catch up with the community, see the latest developments and share our ongoing work! With @rimchaudhury15.bsky.social @advaitagashe.bsky.social, @kevindaniel.bsky.social and @aidamaric.bsky.social we'll be well represented 👍🏻

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Sjon Hartman @hartman-plantlab.com · 19/09/2025

Starting our first @dompsfr.bsky.social #plantscience seminar series of the academic year with a thank you by @elkebarbez.bsky.social for postdoc appreciation day, chocolates and a talk by @beritebert.bsky.social on cell walls and glycans!

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Sjon Hartman @hartman-plantlab.com · 02/09/2025

Update talk by @rimchaudhury15.bsky.social at the @sgbmfreiburg.bsky.social reunion seminar series on her @daadworldwide.bsky.social funded rain-priming project. Good practice for the upcoming @isplore.bsky.social conference later this month 👌🏻☔🌱🌊

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Sjon Hartman @hartman-plantlab.com · 01/09/2025

Strelitzia reginae - Bird of paradise. Happy birthday!

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Sjon Hartman @hartman-plantlab.com · 19/08/2025

Congrats to our fantastic MSc student Johanna Söntgerath for winning best #plantscience Master Thesis of @uni-freiburg.de 🎉🥇Thanks to @aidamaric.bsky.social for leading the project and @plantsciencedbg.bsky.social for the award!

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Sjon Hartman @hartman-plantlab.com · 18/07/2025

Amazing talk on all things Lateral Roots by @sophiezoe.bsky.social today in our @dompsfr.bsky.social seminar series. 🙏🏼 We binged through the whole series in under an hour!

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Sjon Hartman @hartman-plantlab.com · 07/07/2025

Bronze for our Johanna 👍🏻🌱 So proud!

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Sjon Hartman @hartman-plantlab.com · 07/07/2025

Full house at this year's Science Slam Freiburg! We're rooting for the @dompsfr.bsky.social @biologyunifreiburg.bsky.social #plantscience pitches by Johanna Söntgerath and Yanling Yu 🌱👍🏻

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Sjon Hartman @hartman-plantlab.com · 12/06/2025

First lab BBQ of the year to celebrate the good weather, say goodbyes and welcome new members 🎉💐 #plantscience

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Sjon Hartman @hartman-plantlab.com · 28/05/2025

Yesterday we joined the B2Run charity 5k run in Freiburg with a lab team! It was super fun and we're motivated to improve our time next year 😉👌🏻

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Sjon Hartman @hartman-plantlab.com · 23/05/2025

AI still needs better training data 😆

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Sjon Hartman @hartman-plantlab.com · 02/05/2025

Great weather today, so we went for a lab hike in the Black Forest 🌲🌲 Including @rimchaudhury15.bsky.social @kevindaniel.bsky.social @advaitagashe.bsky.social www.hartman-plantlab.com/portfolio/sp...

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Sjon Hartman @hartman-plantlab.com · 27/03/2025

Indian lab lunch to celebrate Advait Agashe joining us as a PhD student through the @mpi-ie.bsky.social IMPRS program for the coming years to work on epigenetic stress memory in #plantscience 🌱 Delicious home-cooked food by @rimchaudhury15.bsky.social and Advait! 🥘

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Sjon Hartman @hartman-plantlab.com · 17/03/2025

Decent and calming office view this morning at @biologyunifreiburg.bsky.social before another week of teaching commences 🌱

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Sjon Hartman @hartman-plantlab.com · 25/02/2025

The abstract, according to AI detector: gptzero.me #plantscience

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Sjon Hartman @hartman-plantlab.com · 13/02/2025

Greatly amusing talk by @somssich.bsky.social on spatial defense responses against fusarium at #MBP2025

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Sjon Hartman @hartman-plantlab.com · 12/02/2025

Very proud PI moment 🤗 @rimchaudhury15.bsky.social introduces her rain priming PhD project at #MBP2025🌱☔ Check out her recent review here: academic.oup.com/plphys/artic...

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Sjon Hartman @hartman-plantlab.com · 11/02/2025

First flooding talk of #MBP2025 by Angelika Mustroph, discoverer of the core hypoxia gene set! Today she shows her work on variation in flooding tolerance across brassica species 🌱🌊

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