The seminars take place on the Montpellier Institut Agro/INRAE Campus of La Gaillarde (2, place P. Viala Montpellier)

Thursday, November 9  2023

at 2 pm – Amphi 2 (Bât2 Bis)

Miloš Tanurdžić

(School of Chemistry and Molecular Biosciences -The University of Queensland– Australie)

Chromatin-based gene regulatory mechanisms controlling plant architecture

Plants’ exceptional phenotypic plasticity is nicely shown by the unique form and shape each plant takes; its potential is genetic, but its ultimate phenotype results from interactions with the environment. In order to understand the gene regulatory networks that underly plant architecture and the molecular signals provided by ontogenic and environmental inputs, we have been studying the process of axillary bud dormancy initiation by the plant hormone strigolactone. Using functional genomics, epigenomics and systems biology tools in the model plant Arabidopsis, we have identified early transcriptomic changes in response to dormancy-inducing strigolactone signal and identified some of the key components of the gene regulatory network controlled by strigolactone. We discovered chromatin remodellers, epigenetic modifiers and transitive RNAi components as some of the early targets of strigolactone signaling, which prompted us to look at changes to chromatin accessibility and modifications in response to strigolactone. We identified hundreds of putative cis-regulatory components and several novel trans-acting transcription factors of the strigolactone gene regulatory network, as well as dynamic epigenomic reprogramming in response to strigolactone.

Contact: Sandrine Ruffel

Contacts IBIP :

Sabine Zimmermann (sabine.zimmermann@cnrs.fr)

Alexandre Martiniere (alexandre.martiniere@cnrs.fr)

Aude Coupel-Ledru (aude.coupel-ledru@inrae.fr)

Chantal Baracco (chantal.baracco@inrae.fr)