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Stefan de Folter

@defolter-lab.bsky.social
369 followers 538 following 12 posts

Professor at UGA-Cinvestav, plant functional genomics, flower and fruit development, EiC Planta (Springer), 🇳🇱 in 🇲🇽

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Stefan de Folter @defolter-lab.bsky.social · 27/09/2026
New paper from the lab: The role of SlGH9-16 cellulase in gynoecium morphogenesis and fruit texture in tomato. Work lead by Daniela de la Mora-Franco 🍅🌱 doi.org/10.1016/j.pl... ➡️Improved shelf-life 🍅
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Joris Sprakel @jorissprakel.bsky.social · 25/07/2026
How do transcription factors bind DNA strongly, and in a switch like manner, while remaining sequence specific? Our new paper on a canonical plant TF suggests the answer is a previously underappreciated assembly state: transcription factor nanoclusters. www.science.org/doi/10.1126/...
science.org
Nanoclustering of a plant transcription factor enables strong yet specific DNA binding
Transcription factor nanoclusters balance the DNA binding trade-off between weakly binding oligomers and nonspecific condensates.
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Daniel Kierzkowski @kierzkowskilab.bsky.social · 12/09/2026
🌱We are looking for an Assistant Professor in Plant Molecular Genetics @irbv.bsky.social If you are passionate about genetics, molecular biology, or imaging, this is your chance to join a community of researchers working on plant development, cell biology, evolution, ecology, and biodiversity. 👇
rh-carriere-dmz-eng.synchro.umontreal.ca
Careers
Through your undergraduate and graduate-level teaching, and your research activities, you will contribute to the faculty’s pursuit of excellence. Furthermore, you will promote your discipline and actively participate in the daily activities of a renowned institution. As such, you will:
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Aaron Rashotte @aaronrashotte.bsky.social · 08/08/2026
Excited our lab's article was selected as "Plant Physiology Article of the Week - Aug 6" - Check it out if you didn't see it when it first came out - #aspb academic.oup.com/plphys/artic...
academic.oup.com
Cytokinin senescence delay is shaped by receptor specificity and metabolic stability
Abstract. Each of the 4 different cytokinin (CK) base forms, trans-zeatin (tZ), isopentenyladenine (iP), dihydrozeatin (DHZ), and cis-zeatin (cZ) has disti
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Journal of Experimental Botany @jxbotany.bsky.social · 07/08/2026
🌸 We are renewing the Flowering Newsletter subscriber list ahead of the 2026 edition! If you’d like to receive updates, please sign up here: airtable.com/appIAqe... 📬 Please feel free to share the form with colleagues and students who may be interested in subscribing 📬 #PlantScience 🧪
The 2025 "My favourite flowering image". The brightest orange: California poppy (Eschscholzia californica) flowers as windows into evolutionary developmental genetics. Two fused sepals form a hat-like structure that has already dehisced, while four free bright orange petals adorn the blossom. Inside the flower, though not visible from this perspective, are numerous stamens arranged in several whorls and a gynoecium composed of two carpels. The gynoecium is surrounded by a floral cup forming a wide rim, which can be seen on the lower left, once all other organs have fallen off. (Image credit: Annette Becker.)
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Plant Science Spotlight @plant-sci.bsky.social · 06/08/2026
🌱🧬Rubisco limits photosynthesis. Stalled by model bias & weak screening. A path forward: molecular dynamics, biodiversity mining, cyanobacteria screening & chloroplast editing A framework for better crops #plantscience @defolter-lab.bsky.social @springernature.com link.springer.com/article/10.1...
link.springer.com
Rubisco limits plant breeding: can biodiversity unlock it? - Planta
Main conclusion Photosynthesis has been underestimated as a breeding target. A workflow that identifies or engineers superior Rubisco variants and introduces them into crops is urgently needed. Abstra...
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Stefan de Folter @defolter-lab.bsky.social · 06/08/2026
link.springer.com/collections/...
link.springer.com
Physiological and molecular mechanisms involved in wheat resilience to climate change
Wheat is a crucial crop in many regions of the world, both culturally and economically, as well as for global food security. Its yield has long been linked to ...
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Stefan de Folter @defolter-lab.bsky.social · 06/08/2026
x.com/planta_journ...
x.com
Planta_Journal (@Planta_Journal) on X
🚨New deadline: 31 December 2026! ➡️https://t.co/8fZWuZECXH
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Javier Brumós @jbrumos.bsky.social · 25/12/2025
These 99 'lab hacks' will make your scientific work easier www.nature.com/articles/d41...
nature.com
These 99 'lab hacks' will make your scientific work easier
Nature asked contributors, editors and working researchers to share their best advice for scientists.
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Stefan de Folter @defolter-lab.bsky.social · 29/12/2025
Wishing you the best this season and always! Happy holidays ✨🥂
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Journal of Experimental Botany @jxbotany.bsky.social · 06/12/2025
🧬 SPECIAL ISSUE RESEARCH 🧬 🍅 Genome-edited tomato mutants for the SPATULA gene elucidated conserved functions during gynoecium development, improving our understanding of the SPT gene in fleshy fruits- Martínez-Estrada et al. 🔗 doi.org/10.1093/jxb/... #PlantScience 🧪 @defolter-lab.bsky.social
Fig. 4.Effect of the lack of SlSPT function on pollen tube growth and ovary characteristics in slspt mutants and wild-type (WT; Micro-Tom) plants. (A) Pollen tube growth in the gynoecium. (B) Pollen tube staining measured as relative intensity units. (C) Micrographs of transverse sections of the ovary at anthesis, with a magnified view of the pericarp of the ovary at anthesis. (D, E) Comparison of cell layers and pericarp thickness between WT and slspt mutants. Different letters indicate statistically significant differences [ANOVA followed by Fisher's LSD test, P≤0.05, n=10, for (B), Kruskal–Wallis test followed by Dunn’s test, P≤0.05, n=15, for (D); Tukey’s range test, P≤0.05, n=15, for (E)]. Scale bars: 1 mm (A), 0.4 mm (C left); 50 µm (C right).
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Journal of Experimental Botany @jxbotany.bsky.social · 09/12/2025
🌸 Flowering Newsletter Review 🌸 López-Gómez et al. review the role of protein–protein interactions in flower and fruit development and discuss the latest techniques to study them. 🔗 doi.org/10.1093/jxb/... #PlantScience 🧪 @defolter-lab.bsky.social
Fig. 1 (shortened, full legend in paper): Complexity of gynoecium development shown with confocal microscopy imaging. (A) Meristematic stages of floral development in which the inflorescence meristem (IM) is observed; from stage 3, the sepal primordia (asterisks) are observed; in stage 4, the developing sepals (asterisks) partially cover the floral meristem (FM); and in stage 5, the FM is completely covered by the sepals. (B) Stage 6 in which the gynoecium is established with the appearance of the primordium of the gynoecium. (C) In stage 7, the middle and lateral domains can be differentiated (marked by dotted lines). (D–H) Longitudinal view of the gynoecium from stage 8 to 12. At stages 8 and 9, the gynoecium grows as a hollow tube and the valves and young replum can be seen. (F and G) Longitudinal view of stage 10 and 11 gynoecia showing the replum and valves. (H) Mature stage 12 gynoecium showing the stigma, style, and ovary, the latter formed by the valves and replum.
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Journal of Experimental Botany @jxbotany.bsky.social · 23/12/2025
Wide-ranging topics are covered in the expected papers so far, from signalling to stress responses and development 🌿 🔄 🍄 🌡️ @defolter-lab.bsky.social @uhammes.bsky.social @shabeklab.bsky.social @christatesterink.bsky.social @sebiology.bsky.social #JXBspecialissues #PlantScience 🧪
Special issue outline: Plant Growth Substances Phytohormones are chemical relays that inform the plant about the state of the internal and external environment. Recent advances in this field include increasingly accurate quantitation of small molecule and peptide hormones, discoveries of how hormones enable inter-kingdom communication and immunity, and a clearer picture of how these signals evolved. Systems approaches are also allowing researchers to dissect how cell-type-specific interactions among multiple hormones shape distinct forms and functions. Together, the contributions in this issue highlight the continuing impact of studying plant growth substances on foundational questions, while also providing inspiration for novel methods for crop improvement. 
Interested in contributing? Please go to the link in the previous post for more info and to contact the editorial office.
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Daniel Kierzkowski @kierzkowskilab.bsky.social · 25/12/2025
New paper from our lab @jxbotany.bsky.social about auxin and cytokinin interactions during carpel initiation in Arabidopsis Led by @andreagomezfe.bsky.social in collaboration with @defolter-lab.bsky.social academic.oup.com/jxb/advance-...
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Andrea Gómez-Felipe @andreagomezfe.bsky.social · 15/12/2025
I’m happy to finally share our story on carpel initiation in Arabidopsis and how auxin and cytokinin shape carpel growth patterns. Auxin and cytokinin regulate growth dynamics underlying carpel initiation url: academic.oup.com/jxb/article/...
academic.oup.com
Auxin and cytokinin regulate growth dynamics underlying carpel initiation
Abstract. Plant organ initiation requires precise spatial and temporal coordination of cellular behaviors. In Arabidopsis thaliana, the gynoecium, the fema
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Andrea Gómez-Felipe @andreagomezfe.bsky.social · 05/08/2025
One of my first live imaging of Arabidopsis gynoecium www.nature.com/articles/s41...
nature.com
Two orthogonal differentiation gradients locally coordinate fruit morphogenesis
Nature Communications - The coordination of cellular behaviors is essential for proper organogenesis. Here the authors show that fruit development in Arabidopsis is governed by time-shifted...
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Journal of Experimental Botany @jxbotany.bsky.social · 13/10/2025
🌾🌼 Flowering Newsletter 2025 🌼🌾 "Flowers come in all shapes and sizes, from inconspicuous wind-pollinated grass flowers to the large flowers of California poppy with its bright petals" - @ucdflowerpower.bsky.social 🔗 bit.ly/JXBFNL?utm_so... A 🧵 incoming... #FNL25 #PlantScience 🧪 1/9
Flowers of California poppy (Eschscholzia californica). Two fused sepals form a hat-like structure that has already dehisced, while four free bright orange petals adorn the blossom. Inside the flower, though not visible from this perspective, are numerous stamens arranged in several whorls and a gynoecium composed of two carpels. The gynoecium is surrounded by a floral cup forming a wide rim, which can be seen on the lower left, once all other organs have fallen off. (Image credit: Annette Becker.)
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Journal of Experimental Botany @jxbotany.bsky.social · 23/07/2025
🌸🧬🔬 INSIGHT 🌸🧬🔬 Almost lost in translation: integrated transcriptome and proteome analyses for early Arabidopsis flower development - Stefan de Folter 📝 Insight: doi.org/10.1093/jxb/... 🔬 Research: doi.org/10.1093/jxb/... #PlantScience 🧪
AP1 floral induction system and experimental strategy used. (A) The AP1 floral induction system (pAP1::AP1-GR ap1 cal) was used in Arabidopsis. On the left, an SEM image of overproliferation inflorescence meristems of the ap1 cal mutant and on the right, an SEM image of many synchronized floral buds 5 d after dexamethasone (DEX) treatment are shown. (B) Overview of the workflow and sampling scheme. The extraction buffer Trizol was used, so from the same tissue sample, RNA and protein could be extracted. Subsequently, RNA-seq and LC-MS/MS were performed, followed by data analyses. SEM images provided by José Luis Riechmann.
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Stefan de Folter @defolter-lab.bsky.social · 14/07/2025
Almost lost in translation: integrated transcriptome and proteome analyses for early Arabidopsis flower development url: academic.oup.com/jxb/article/... Insight on the article by Álvarez-Urdiola et al. (2025) @jxbotany.bsky.social
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Stefan de Folter @defolter-lab.bsky.social · 09/07/2025
Please consider Planta for your next science.
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Stefan de Folter @defolter-lab.bsky.social · 28/06/2025
Happy to speak next week at #IPGSA2025
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2025 International Plant Growth Substance Association (IPGSA) @ipgsa2025.bsky.social · 24/06/2025
It's in a few days! IPGSA 2025, the premier conference for research on ALL substances that regulate plant growth and responses to the environment: small molecules, phytohormones and peptide hormones. See you soon in Colorado! #IPGSA2025
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Stefan de Folter @defolter-lab.bsky.social · 22/06/2025
Plant Sciences represented at #ICDB2025 🌷🍀@SocDevBio @socdevbio.bsky.social
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Stefan de Folter @defolter-lab.bsky.social · 16/06/2025
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North American Arabidopsis Steering Committee @naascarabidopsis.bsky.social · 13/06/2025
Learn the unique career stories of 3 Arabidopsis plant biology faculty at CINVESTAV- Mexico in this episode of "My Plant Biology Story" featuring Stefan De Folter, Nayelli Marsch, and Stewart Gillmor! Brought to you by NAASC. @defolter-lab.bsky.social youtu.be/lOok5cb2FZw
youtu.be
My Plant Biology Story (MPBS) Hosted by the North American Arabidopsis Steering Committee (NAASC)
YouTube video by NAASC
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Stefan de Folter @defolter-lab.bsky.social · 06/06/2025
Tomorrow- Friday at 11 am Mexican time.
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North American Arabidopsis Steering Committee @naascarabidopsis.bsky.social · 30/05/2025
RSVP today for next week's 2 professional / career development webinar two pack! 👏June 4: From Sound Science to Successful Publication, organized by @plantpostdocs.bsky.social 👏June 6: My Plant Biology Story from NAASC ! Registration links here ➡️https://mailchi.mp/e33a618cf39b/soundsciencempbs
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Society for Developmental Biology @socdevbio.bsky.social · 13/05/2025
🔈 Thrilled to have Stefan de Folter @defolter-lab.bsky.social as an invited speaker at #ICDB2025! Stefan investigates floral development and transcriptional regulation in plants, shedding light on reproductive innovation. 🌸📜
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Dior Kelley @diorkelley.bsky.social · 05/05/2025
New CRISPR tools for tomato functional genomics from Eilon Shani! 🍅 🧬 ✂️ www.nature.com/articles/s41...
nature.com
Construction of multi-targeted CRISPR libraries in tomato to overcome functional redundancy at genome-scale level - Nature Communications
Genetic variance is vital for breeding programs and mutant screening, yet traditional mutagenesis methods wrestle with genetic redundancy and a lack of specificity in gene targeting. Here the authors ...
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North American Arabidopsis Steering Committee @naascarabidopsis.bsky.social · 30/04/2025
NAASC is excited to host Dr. Stefan DeFolter, Dr. Nayelli Marsch, and Dr. Stewart Gillmor on June 6 to learn their Plant Biology Story! Join the June 6th webinar to learn about 3 plant biology faculty at CINVESTAV-IPN in Irapuato, Mexico Register now at www.arabidopsiscommunity.org/mpbs
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Nick Desnoyer @nickdesnoyer.bsky.social · 13/03/2025
Agamydopsis superpetala
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Stefan de Folter @defolter-lab.bsky.social · 04/03/2025
Did you know that the journal Planta exists for 100 year? Please read about the history of the journal: link.springer.com/journal/425/...
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Stefan de Folter @defolter-lab.bsky.social · 21/02/2025
Very happy that one of our first tomato stories is out 🍅 by Eduardo Martinez-Estrada. Conserved and novel roles of the bHLH transcription factor SPATULA in tomato. academic.oup.com/jxb/advance-...
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Annette Becker @plantevodevo-ab.bsky.social · 13/01/2025
Deadline extension for abstract submission (now until Jan 31) to the international meeting "Evolution of Plant Reproduction" organized by dfg-icips.org in Berlin (March 25-28, 2025) with a great line-up of speakers: dfg-icips.org/berlin2025/ and hurry up to register! #PlantScience #PlantEvodevo
This picture shows the tropical palm house of the Berlin Botanical Garden with a pond in the front
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Tatsuya Nobori @tatsuyanobori.bsky.social · 03/01/2025
Repairing a deleterious domestication variant in a floral regulator gene of tomato by base editing www.nature.com/articles/s41...
nature.com
Repairing a deleterious domestication variant in a floral regulator gene of tomato by base editing - Nature Genetics
A deleterious mutation in the tomato transcription factor SSP2 was enriched during domestication. Repairing the deleterious mutation in cultivated tomato by base editing leads to compact growth and ea...
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Daniel Kierzkowski @kierzkowskilab.bsky.social · 18/12/2024
Do you want to know how to live-image internal floral organs with confocal microscope for up to 2 weeks? Check out our protocol: bio-protocol.org/en/bpdetail?... #Arabidopsis #Flower
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Lars Østergaard @larsostergaard.bsky.social · 12/12/2024
Beautiful Brassicaceae fruit-shape diversity. And here we tell you (part of) how it’s done! rdcu.be/d3i8x What a great collab it’s been! Thanks Yang Dong, @matmajda.bsky.social, Richard Smith and entire team. @natureplants.bsky.social @oxfordbiology.bsky.social @johninnescentre.bsky.social
rdcu.be
Evolution of a SHOOTMERISTEMLESS transcription factor binding site promotes fruit shape determination
Nature Plants - This study identifies a molecular mechanism promoting fruit shape variation. Local meristem identity is maintained through autoregulatory activation of the STM gene to allow...
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Daniel Kierzkowski @kierzkowskilab.bsky.social · 12/12/2024
STM is involved in fruit shape determination in Brassicaceae: www.nature.com/articles/s41... #MorphoGraphX
nature.com
Evolution of a SHOOTMERISTEMLESS transcription factor binding site promotes fruit shape determination - Nature Plants
This study identifies a molecular mechanism promoting fruit shape variation. Local meristem identity is maintained through autoregulatory activation of the STM gene to allow post-fertilization changes...
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2025 International Plant Growth Substance Association (IPGSA) @ipgsa2025.bsky.social · 20/11/2024
More info at www.ipgsa2025.org
ipgsa2025.org
Home | IPGSA 2025
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2025 International Plant Growth Substance Association (IPGSA) @ipgsa2025.bsky.social · 20/11/2024
The email announcement of International Plant Growth Substances Association (IPGSA) Conference in 2025 in Fort Collins, Colorado, USA is just out! Please spread the word of what will be a very exciting conference in a beautiful place. #IPGSA2025
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Cristina Ferrándiz @cristicris.bsky.social · 22/10/2024
This started as an “easy” project to start practicing with Boolean models in a system apparently well known, but life is full of surprises… it has been fun! www.mdpi.com/2223-7747/13/20/2927
mdpi.com
A Model for the Gene Regulatory Network Along the Arabidopsis Fruit Medio-Lateral Axis: Rewiring the Pod Shatter Process
Different convergent evolutionary strategies adopted by angiosperm fruits lead to diverse functional seed dispersal units. Dry dehiscent fruits are a common type of fruit, characterized by their lack ...
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