Fanara Steven (@FanaraSteven1) profile picture

Fanara Steven

@FanaraSteven1

Postdoctoral Research associate in plant biology and physiology, nutrient homeostasis and root development. @LRSV_Toulouse.

Joined June 2021
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Photo by Fanara Steven (@FanaraSteven1)Photo by Fanara Steven (@FanaraSteven1)Photo by Fanara Steven (@FanaraSteven1)Photo by Fanara Steven (@FanaraSteven1)Photo by Fanara Steven (@FanaraSteven1)Photo by Fanara Steven (@FanaraSteven1)Photo by Fanara Steven (@FanaraSteven1)
📢 Preprint alert! We investigated how citrate loading into xylem vessels and nicotianamine (NA) compartmentation jointly regulate metal homeostasis in Arabidopsis thaliana. doi.org/10.64898/2026.03.19.… A little thread...
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Fanara Steven retweeted
Santosh Satbhai (@santosh7bhai) profile picture
Santosh Satbhai@santosh7bhaiSep 18
🌱 New preprint! We identify HY5 as a key regulator of coumarin-mediated iron acquisition, coordinating coumarin biosynthesis, activation, and secretion under alkaline conditions. 📄 doi.org/10.64898/2026.09.16.… @sbslab_IISERM @DBS_IISERM @IiserMohali
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ROBE Kévin (@KevinRobePhD) profile picture
ROBE Kévin@KevinRobePhDAug 14
Proud to share our new preprint linking coumarins and ISR! Coumarins link rhizobacteria perception in roots to systemic resistance in leaves bioRxiv 2026.08.11.741996; doi: doi.org/10.64898/2026.08.11.…
Image from ROBE Kévin (@KevinRobePhD)
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Santosh Satbhai (@santosh7bhai) profile picture
Santosh Satbhai@santosh7bhaiJun 14
Excited to share our new paper in @PlantPhys led by the talented PhD student @PJakhar_3097. Thanks to several @sbslab_IISERM members and @wheat_biology for their contributions. @DBS_IISERM @IiserMohali academic.oup.com/plphys/adva…
Blue light promotes root iron acquisition via a shoot CRY–HY5 signaling module in Arabidopsis

Blue light promotes root iron acquisition via a shoot CRY–HY5 signaling module in Arabidopsis

Blue light, acting via cryptochromes and the transcription factor HY5, positively regulates iron accumulation in Arabidopsis, revealing a new mechanism for

academic.oup.com
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Fanara Steven retweeted
New Phytologist (@NewPhyt) profile picture
New Phytologist@NewPhytMar 22
#TansleyInsight: CLE peptides in plant-biotic interactions Nicolas Frei dit Frey & Thomas Spallek 👇 📖 nph.onlinelibrary.wiley.com/… #LatestIssue
Fig. 1 CLAVATA3/EMBRYO SURROUNDING REGION (CLE) in biotic plant interactions.

ALT Fig. 1 CLAVATA3/EMBRYO SURROUNDING REGION (CLE) in biotic plant interactions.

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9/ Overall, our results show that simultaneous disruption of citrate export and NA compartmentation leads to major alterations of the ionome, impaired metal partitioning, persistent oxidative stress and defects in RAM function.
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HUGE thanks to the Translational Plant Biology team, Prof. Marc Hanikenne for his guidance, and all colleagues who contributed to this work through experiments, laughs and/or discussions. ❤️
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8/ While all the other genotypes produce siliques under hydroponic conditions, the double mutant fails to complete reproductive development. Seeds were only obtained from soil-grown plants supplemented weekly with sequestrene, and they show elevated Fe and Zn levels.
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7/ These phenotypes are associated with strongly reduced root-to-shoot translocation, despite the pronounced induction of the NA biosynthetic pathway, which likely reflects an attempt to restore metal mobility.
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6/ At later vegetative stages, these trends persist: high Fe, Mn and Zn accumulation in roots and shoots, and sustained oxidative stress in roots.
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5/ We observed strong accumulation of Fe, Mn and Zn in the double mutant, together with the enhanced activity of the Fe uptake machinery, including IRT1 that is known to uptake these metal ions.
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4/ Interestingly, LR density increases under Zn excess, primarily due to the severe inhibition of the PR elongation. This prompted us to examine the integrity of the root apical meristem (RAM), which is reduced in the double mutant and shows visible cell death under high Zn.
Image from Fanara Steven (@FanaraSteven1)
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3/ The double mutant exhibits strong alterations in root system architecture, exacerbated under high Zn stress: shorter primary root (PR), and fewer and shorter lateral roots (LR).
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2/ To address this, we generated frd3 zif1 double mutants and assessed several traits, including developmental parameters and ionomics, across young and mature vegetative, as well as reproductive stages (kinda, stay until the end! 😉)
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1/ Citrate and NA have distinct but interconnected functions. a) Citrate supports metal transport in xylem-fed tissues b) NA is involved in intracellular trafficking and phloem-mediated remobilization. Their coordination remains poorly investigated at the physiological level.
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1/ ✨ New preprint alert ✨ "Stepwise evolution of the developmental and symbiotic functions of DELLA in land plants" Here we investigated the role of the single GRAS transcription factor DELLA in #MyMarchantia doi.org/10.64898/2026.03.02.… #PlantScience A thread...
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My proposal was one of 1,966 submitted in the MSCA-LIF (Life Sciences) section this year. Despite my initial doubts, I am beyond thrilled to have been awarded this grant. I am truly honored to have incredible supervisors who guide me in the right direction. @MSCActions
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I feel incredibly lucky to be surrounded by inspiring and driven colleagues and friends. Science has never felt so fulfilling and balanced for me!
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Fanara Steven retweeted
Karima (@KarimaEL16) profile picture
Karima@KarimaEL1621 Dec 2024
It's my pleasure to share with you a chapter of the project I fell in love with five years ago 🍀🦠 biorxiv.org/content/10.1101/… Here is a thread 🧵
Horizontal gene transfers and terpene metabolism drive plant-fungal interaction in Marchantia...

Horizontal gene transfers and terpene metabolism drive plant-fungal interaction in Marchantia...

The liverwort Marchantia polymorpha has emerged as a model for studying plant immunity in bryophytes, providing unique insights into conserved defense mechanisms across land plants. By contrast,...

biorxiv.org
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Nucleo-cytoplasmic distribution of SAP18 reveals its dual function in splicing regulation and heat stress response in Arabidopsis #research #PlantCommunications cell.com/plant-communication…
Image from Molecular Plant & Plant Communications (@MPlantPCom)
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