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Hanna Hõrak

@hanna-horak.bsky.social
440 followers 888 following 2 posts

Associate Professor in the University of Tartu, interested in stomatal development and physiology

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Reposted by Hanna Hõrak
New Phytologist @newphyt.bsky.social · 20/08/2026
On the cover of our #LatestIssue: A hand-knitted wire sculpture of stomata on the epidermis of wheat, made by scientist and artist Dr Jodie Armand from a 3D confocal image of the wheat epidermis. Image courtesy of Dr Jodie Armand (University of Sheffield). #PlantScience
On the cover of New Phytologist volume 251, issue 6: A hand-knitted wire sculpture of stomata on the epidermis of wheat, made by scientist and artist Dr Jodie Armand from a 3D confocal image of the wheat epidermis.
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Dominique Bergmann @stanfordstomata.bsky.social · 13/08/2026
Super cool exploration of stomatal bHLH gene evolution in ferns and gymnosperms. A decade ago Anne Vatén @stomagenesis.bsky.social already knew these plants were critical missing links -- now her group has functional studies in spruce! www.biorxiv.org/content/10.1...
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Heike Lindner @heikelindner.bsky.social · 10/08/2026
Come join us as a Postdoc on this really cool project in this incredibly inspiring consortium in beautiful Bern! 🌾🔬🏊‍♀️
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Michael Raissig @michaelraissig.bsky.social · 07/08/2026
🌾 We're hiring a postdoc! Join the Stomatal Biology group in beautiful Bern @unibe.ch How do grass leaves spatially coordinate development of veins & stomatal rows? 2 years (plus possible extension), funded by @snsf.ch @dfg.de within @cerealcell.bsky.social RU5325 jobs.unibe.ch/job-vacancie...
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Umeå Plant Science Centre @umeaplantsciencecentre.se · 24/06/2026
🧪🌾VACANCY - How do cell-wall properties shape plant growth?🔬 Join Laura Bacete's group @cellwalldynamics.com as a postdoc and combine plant cell wall biology, biophysics and spatial transcriptomics. Apply by Aug 31👇 www.umu.se/en/work-with...
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Postdoctoral scholarship (2 years) in Plant Cell Wall Biology, Biophysics, and Spatial Transcriptomics
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Laura Ragni @lauraragni.bsky.social · 09/03/2026
🚨 PhD Position in Plant Molecular Biology 🌱 We are looking for a motivated PhD student to join our team to study root protective barriers. If you are interested in confocal microscopy, cell wall biology, and plant development, this project might be for you! Please share! #PlantScience #PlantSciJob
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PlantEvolution 🌱🌾 @plantevolution.bsky.social · 08/03/2026
Impressive work from @saschalaubinger.bsky.social and colleagues, describing molecular and phenotypic footprints of climate in transcriptomes of native Arabidopsis thaliana. #plantscience www.biorxiv.org/content/10.6...
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Association of Applied Biologists @aabiologists.bsky.social · 25/02/2026
🍃 Invited Speakers 🍃 photosynthesis2026.com Photosynthesis in the oceans, Aquatic photosynthesis 🌿Thomas Ryan-Keogh, National Oceanography Centre 🌿Rich Puxty, University of Warwick @noc.ac.uk @warwicklifesci.bsky.social #ICPR26 #photosynthesis
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Association of Applied Biologists @aabiologists.bsky.social · 25/02/2026
🍃 Invited Speakers 🍃 photosynthesis2026.com Plant and ecosystem photosynthesis in a warming world 🌿Martijn Slot, Smithsonian Tropical Research Inst. 🌿Elizabete Carmo-Silva, Lancaster University @martijnslot.bsky.social @ecarmosilva.bsky.social @lancasterplantbio.bsky.social #ICPR26 #photosynthesis
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Association of Applied Biologists @aabiologists.bsky.social · 25/02/2026
🍃 Invited Speakers 🍃 photosynthesis2026.com Artificial photosynthesis and biohybrid systems 🌿Iftach Yacoby, Tel Aviv University 🌿Gustav Berggren, Uppsala University #ICPR26 #photosynthesis
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Association of Applied Biologists @aabiologists.bsky.social · 25/02/2026
🍃 Invited Speakers 🍃 photosynthesis2026.com Rubisco 2.0 🌿Laura Gunn, Cornell University 🌿Jeroni Galmés, University of the Balearic Islands @laura-gunn.bsky.social @uib.cat #ICPR26 #photosynthesis
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Association of Applied Biologists @aabiologists.bsky.social · 25/02/2026
🍃 Invited Speakers 🍃 photosynthesis2026.com C4 and CAM for photosynthetic improvement 🌿Jane Langdale, University of Oxford 🌿Ariel Orellana López, Universidad Andrés Bello @janelangdale.bsky.social @biology.ox.ac.uk #ICPR26 #photosynthesis
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Association of Applied Biologists @aabiologists.bsky.social · 25/02/2026
🍃🎤🍃 Speaker announcement 🍃🎤🍃 Continuing on from last week, we're happy to announce the next set of Invited Speakers across our Photosynthesis 2026 concurrent sessions! 🌿 Share the stage in Liverpool this July 🌿 Submit your abstract by 31st March 👉 photosynthesis2026.com #plantscience #ICPR26 🧵1/7
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Association of Applied Biologists @aabiologists.bsky.social · 25/02/2026
🍃 Invited Speakers 🍃 photosynthesis2026.com Stomata, the gatekeepers of photosynthesis 🌿Hanna Hõrak, University of Tartu 🌿Silvère Vialet-Chabrand, Wageningen University @hanna-horak.bsky.social @silverevialet.bsky.social @w-u-r.bsky.social #ICPR26 #photosynthesis
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New Phytologist @newphyt.bsky.social · 22/01/2026
Functional and developmental differences between adaxial and abaxial #stomata in amphistomatous #leaves A #ResearchReview by @hanna-horak.bsky.social 👇 📖 nph.onlinelibrary.wiley.com/doi/10.1111/... #LatestIssue
Fig. 1 Different light responses of adaxial and abaxial stomata in a dicot leaf.
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Michael Raissig @michaelraissig.bsky.social · 13/01/2026
Save the date: Plant Development PhD school (i.e. Retzbach 2.0) in Neustadt, Germany. Sept 23rd-25th, 2026 ~€350 all inclusive Excellent speakers and a relaxed atmosphere for early-career researchers (PhDs & postdocs). Registration opens soon. For more info, see raissiglab.org/plantdevosch...
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Lehti Saag @lehtisaag.bsky.social · 14/01/2026
📣 We are seeking a postdoctoral research fellow in ancient metagenomics. Join us at the Institute of Genomics, University of Tartu. ⏳ 01.04.2026–31.03.2028 📚 1.0 position 📍 Riia 23b, Tartu, Estonia ℹ️ Project: lnkd.in/dQARuBxM ℹ️ Application: lnkd.in/dFR8DQxH ⏰ Deadline 02.02.2026
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Annals of Botany @annbot.bsky.social · 10/01/2026
🔥ADVANCE ACCESS🔥: Carbon dioxide or photosynthetically active radiation? Evaluation of the significance of individual environmental factors that control leaf stomatal development doi.org/10.1093/aob/... #PlantScience
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Sebastian Samwald (Basti) he/him @samwalds.bsky.social · 01/01/2026
Happy New Year! May all your PCRs give you only specific bands of the appropriate sizes. May your gel extraction and miniprep yields be high. May your cloning always give you at least one correct colony, and your genotyping identify the mutants you are after. ✨
A gel electrophoresis picture.
It shows DNA of different sizes.
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New Phytologist @newphyt.bsky.social · 17/12/2025
Profile of Anna Kampová nph.onlinelibrary.wiley.com/doi/10.1111/...
Photo of Anna Kampová,
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Hanna Hõrak @hanna-horak.bsky.social · 09/12/2025
Thankful, happy and excited to be awarded an ERC consolidator grant to understand how and why some plants make stomata on their upper leaf surface. tuit.ut.ee/en/news/erc-... #ERCCoG @erc.europa.eu
tuit.ut.ee
ERC grant helps to understand why the upper and lower surfaces of plant leaves differ
Hanna Hõrak, Associate Professor of Molecular Plant Physiology at the University of Tartu Institute of Technology, has received a prestigious European Research Council (ERC) grant to study how cell pa...
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New Phytologist @newphyt.bsky.social · 25/11/2025
Stomatal development and function in the upper and lower leaf surfaces Hõrak @hanna-horak.bsky.social nph.onlinelibrary.wiley.com/doi/10.1111/...
Different light responses of adaxial and abaxial stomata in a dicot leaf.
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Michael Raissig @michaelraissig.bsky.social · 05/11/2025
1/ Preprint alert:
 🌾 The developing leaf of the wild grass Brachypodium distachyon at single-cell resolution
 👉 doi.org/10.1101/2025... A 70k-cell single-cell RNA-seq atlas of the developing grass leaf—from the shoot meristem to mature leaf tissues. @cerealcell.bsky.social @lbmountain.bsky.social
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Mark A. Hanson @hansonmark.bsky.social · 10/06/2025
New from The Strain Team: 🎊 Springer Nature Discovers MDPI 🎊 Springer Nature has spawned a copycat journal series called "Discover" mimicking #MDPI journal titles and citation behaviours. We even made a browser game to prove it (see 🔗). Gross! 😀 1/n #ResearchIntegrity #SciPub #AcademicSky
the-strain-on-scientific-publishing.github.io
Spinger Nature Discovers MDPI – The Strain on Scientific Publishing
Home page for the paper ‘The Strain on Scientific Publishing’ by Mark A Hanson, Dan Brockington, Paolo Crosetto and Pablo Gomez Barreiro
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The Plant Cell @theplantcell.bsky.social · 02/06/2025
📣The Plant Cell is recruiting Assistant Features Editors. The application period opens now and runs through September 15, 2025!🌱 👉Application information can be found at this link: blog.aspb.org/the-plant-ce... #plantscience
Image Text: The Plant Cell. Call for Assistant Features Editors. Deadline for applications: September 15, 2025. Featuring The Plant Cell logo.
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Margot Smit @likeyoda1.bsky.social · 05/06/2025
We're looking for a new PhD candidate to join the lab. Please share 🌱😄
A PhD position (initially 3 years) is available in our laboratory in the Center for Plant Molecular Biology (ZMBP), at the University of Tübingen (Germany). The position is available with an intended start date starting January 2026.
Interested applicants should submit a single PDF comprising a motivation letter describing your research interests, an up-to-date CV, and the names and contact information for 2 references to timing.lab@zmbp.uni-tuebingen.de ideally before July 21st.
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Jim Rowe @botanicaljim.bsky.social · 14/03/2025
The Rowe lab is recruiting a #PlantScience PhD student for 2025! You'll use our new ABACUS FRET biosensors to map the leaf #AbscisicAcid accumulations at low humidity in Arabidopsis, wheat and rice to understand how ABA regulates stomatal dynamics. #PhDposition www.findaphd.com/phds/project...
A grey coloured Arabidopsis leaf epidermis, with black cell walls. Each cells has a colourful blobs - a nuclear localised fluorescent ABA sensor, with warm colours indicating high concentrations, and cooler colours indicating lower concentrations.
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Tom van den Berg @montis86.bsky.social · 10/03/2025
Excited to share our latest research on stomatal dynamics! We developed a microscope to image individual stomata. Maize stomata respond faster to light changes, optimizing CO₂ uptake, while chrysanthemum shows slower closure, affecting water use. onlinelibrary.wiley.com/doi/epdf/10.... #Stomata
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Bobby Caine @bc247.bsky.social · 07/03/2025
TODAY is DEADLINE DAY for abstract submissions for talks and posters at SEB 2025! @casparchater.bsky.social and I have a great lineup of Keynote speakers in our #stomata session including SEB president @proftlawson.bsky.social. Please spread the word!
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Bobby Caine @bc247.bsky.social · 04/03/2025
If you want to present your latest #stomata research at SEB 2025, there are only 4 days until the submission deadline(7th of March)!! Excitingly, @casparchater.bsky.social and I can now also announce a brand new Workshop focused on measuring gas exchange across scales with @li-corenv.bsky.social👇👇
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Margot Smit @likeyoda1.bsky.social · 25/02/2025
Great work showing the multifaceted role of FAMA regulating differentiation in stomatal and myrosin cells. Also check out my News & Views piece 📝 As a stomatal enthusiast I was especially intrigued by the potential separation of division and differentiation phenotypes 🌱🤔
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Development @dev-journal.bsky.social · 24/02/2025
In this interview, Dominique Bergmann @stanfordstomata.bsky.social talks about her research in stomatal development, her role as an Editor at Development, and how her passion for comparative biology has influenced her career: doi.org/10.1242/dev.204667
Photo of Dominique Bergmann
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Bobby Caine @bc247.bsky.social · 21/02/2025
Only 2 weeks to go until the deadline for talk and poster abstracts for SEB 2025. @casparchater.bsky.social and I are really looking forward to hosting keynotes @proftlawson.bsky.social, Dr John Ferguson and Dr Lorna McAusland for a session on #stomata and #crops. @sebiology.bsky.social Please RT!!
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Michael Raissig @michaelraissig.bsky.social · 14/01/2025
Our @dfgpublic.bsky.social Research Unit "Cereal Stem Cell Systems" is now on Bluesky! Follow us if you are interested in grasses, stem cells and developmental biology. @simonrdg.bsky.social @schnittger-lab.bsky.social @hochholdingerf.bsky.social @yvonnestahl.bsky.social @cecilialaram.bsky.social
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Hanna Hõrak @hanna-horak.bsky.social · 09/01/2025
Happy to share our preprint on negative relationship between adaxial stomatal density and yield in wheat under field conditions, especially under water and nutrient limitation.
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Jim Rowe @botanicaljim.bsky.social · 06/01/2025
There is ONE WEEK left to apply for the #PlantScience #PhD position in my lab! This will use the latest #microscopy, #biosensor and #ecophysiology techniques!
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Richard Sever @richardsever.bsky.social · 01/01/2025
2024 saw another record for bioRxiv postings. Thanks to all the CSHL staff, affiliates, authors, funders, and everyone who advocates for the project. Happy New Year and #letsmakethisthenorm ! 🧪
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New Phytologist @newphyt.bsky.social · 30/12/2024
Call for papers: #Stomata Submit your abstract by 14 February 2025 Deadline for manuscripts: 30 June 2025 More details 👇 www.newphytologist.org/news/view/353 Watch talks from the recent New Phytologist symposium on the topic: cassyni.com/s/newphyt2024
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Dominique Bergmann @stanfordstomata.bsky.social · 30/12/2024
End the year by enjoying the blockbuster story led by Xin Cheng and @heikelindner.bsky.social presented by @michaelraissig.bsky.social at the @newphyt.bsky.social stomata conference. How CAM plants make their very special stomata + SCs (hint, it's MUTE again) www.biorxiv.org/content/10.1...
epidermis of Kalanchoe with stomata, subsidiary cells and pavement cells altered by overexpression of KlaxMUTE
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Heike Lindner @heikelindner.bsky.social · 28/12/2024
This story was only possible through true team effort. Team Kalanchoë with Xin at the forefront. @jameshartwell.bsky.social, the most generous scientist who shared resources and answered countless questions. Read about MUTE during stomatal development in Kalanchoë www.biorxiv.org/content/10.1...
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AoB Plants @aobp.bsky.social · 28/12/2024
♻️Grass leaf structural and stomatal trait responses to climate gradients assessed over the 20th century and across the Great Plains, USA by Ryan Donnelly and co-authors Full #openaccess 👉 buff.ly/4f3dnJM #PlantScience
buff.ly
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bioRxiv Plant Bio @biorxiv-plants.bsky.social · 28/12/2024
MUTE drives asymmetric divisions to form stomatal subsidiary cells in Crassulaceae succulents www.biorxiv.org/content/10.1101/202…
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PlantEvolution 🌱🌾 @plantevolution.bsky.social · 27/12/2024
Announcing a curated collection of long-read genomes for Arabidopsis thaliana: The 1001 Genomes Plus Project. Currently 453 unique accessions/almost 600 assemblies. Interested in contributing? Please contact us! #plantscience www.biorxiv.org/content/10.1...
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New Phytologist @newphyt.bsky.social · 26/12/2024
The recorded talks from the 46th New Phytologist Symposium: Stomata #46NPS are available to watch on demand! Check them out on our Cassyni channel: cassyni.com/s/newphyt2024 Our call for papers on stomata is open until 14 February 2025: www.newphytologist.org/news/view/353
cassyni.com
New Phytologist Foundation Events 2024 - seminars · Cassyni
The New Phytologist Foundation organises and supports symposia and workshops. More details are available here: . This series hosts the recordings from these events. 46th New Phytologist Symposium:…
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Elena Kramer @elenakramer.bsky.social · 13/12/2024
Are you a plant science researcher working towards a PhD or an early career researcher who completed their PhD no more than five years ago? Consider applying to the Next Generation Scientists 2025 meeting, sponsored by New Phytologist! #botany www.newphytologist.org/nextgenevent...
newphytologist.org
Next generation scientists 2025
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Jim Rowe @botanicaljim.bsky.social · 05/12/2024
Still plenty of time to apply for a PhD with me and Julie Gray for 2025! Please repost!
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Laura Bacete @laurabacete.eurosky.social · 02/12/2024
🚨 PhD Opportunity Alert! 🚨 I'm thrilled to announce my new project, Watchers on the Wall, exploring how plant cells sense and respond to stress through their walls. 🌱 A 5-year fully funded PhD position is open—please share with potential candidates! 👇 (1/7)
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Beverley Glover @beverleycubg.bsky.social · 26/11/2024
My first post here! We’re looking for an enthusiastic plant developmentalist to join our team as a postdoc working on how this wonderful plant builds sexually deceptive flowers. Link here: www.jobs.cam.ac.uk/job/49334/
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Lisa Smith @plantylisasmith.bsky.social · 26/11/2024
PhD position now available on the molecular basis of plant reproduction, supervised by me, Andrew Fleming and Sam Amsbury. More project info: www.findaphd.com/phds/project... About the Doctoral Training Programme and how to apply: www.whiterose-mechanisticbiology-dtp.ac.uk. Deadline: 6th Jan 2025
Description of PhD studentship which replicates information at https://www.findaphd.com/phds/project/signalling-complexes-and-cell-wall-changes-during-plant-reproduction/?p177787
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New Phytologist @newphyt.bsky.social · 25/11/2024
📢 Tomorrow! Join us for New Phytologist Now: Stomata – with Sally Assmann and Keiko Torii. Live Q&A hosted by Hanna Hõrak. 15:30 GMT | 26 November It's free to attend! Register now: us02web.zoom.us/webinar/regi...
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