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Dernière mise à jour : Mai 2018

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Growing and Protecting crops Differently

[THESIS] SUCSEED - Unraveling seed defense regulation in dormant seeds

Applications open until June 1st

Topic: Unraveling seed defense regulation in dormant seeds


Summary:

Seed dormancy is a physiological state that blocks germination. It is an adaptive strategy that allows the seeds to remain quiescent until environmental conditions are favorable for germination and dispersal of the species. Dormant seeds can persist in the soil for months or even years without being attacked by pathogens, while non-dormant seeds gradually become susceptible during imbibition and subqequent germination. Our group has shown that in the model legume Medicago truncatula the Sucrose non-fermenting Related Kinase complex (SnRK1) connects the dormant state of seeds to the activation of a defense program against pathogens by induction of the expression of genes encoding PR proteins and enzymes involved in the synthesis of secondary metabolites such as phytoalexins. The objective of the thesis is to identify the genes constituting the defense program set up during the imbibition of dormant tomato seeds and to study the (epi)genetic mechanisms that regulate its activation. To do this, the thesis will exploit the genetic diversity showing a wide variability in the depth of dormancy in this species. Next, we will study how activation of this defense program contributes on the one hand to antimicrobial activity and prevents damping-off, and on the other hand to germination vigor.


Informations:

Lab: Institut de Recherche en Horticulture et Semences (IRHS) - Seed Team, Angers

Supervisors: Julia Buitink (julia.buitink@inrae.fr), Olivier Leprince (olivier.leprince@agrocampus-ouest.fr)

Graduate school: EGAAL

Starting date: October 2021 (Deadline: June 1st)

  

    

To apply online, please click here or send your CVs and cover letters to julia.buitink@inrae.fr and olivier.leprince@agrocampus-ouest.fr