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

 

Wednesday, October 25 2023

 

at 2 pm – Amphi 2 (Bât2 Bis)

 

Leslie Sieburth

Professor, School of Biological Sciences, University of Utah

 

Dalekin is a root-to-shoot signaling molecule that confers resistance to abiotic stresses

Arabidopsis mutants with defects in the BYPASS1 gene show a severe growth arrest phenotype.  Previous research used grafting to demonstrate that shoot growth arrest arises from a small graft-transmissible metabolite, which we call dalekin.  Dalekin appears to be over-produced in roots of bps1 mutants, and the severe mutant phenotype has made it challenging to work out the dalekin signaling pathway.  However, we have recently turned to transient micrografting to determine whether this small molecule has relevant biological activity.  We used transient micrografts to couple bps1 or wild-type roots to wild-type shoots, and  explored the molecular responses to dalekin in wild-type shoots using RNAseq.  The talk will describe this work, and dalekin’s potential roles in known abiotic stress resistance.

Contact: Yann Boursiac

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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)