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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu logo Cultiver proteger autrement mariane_inrae_ppr_cpa_80

Growing and Protecting crops Differently

[THESIS] SUCSEED - Characterization of germinating seed exudates for the identification of bioactive molecules stimulating and protecting seeds and seedlings

Applications open and considered between April 18 and May 27

Topic:  Characterization of germinating seed exudates for the identification of bioactive molecules stimulating and protecting seeds and seedlings.


Seeds play a fundamental role in the reproduction and dispersal of higher plants. Seed quality is a key element for agricultural performance. The seed vigour is defined by rapid and homogeneous germination, right seedling establishment, and the capability to adapt to biotic and abiotic constraints imposed by the environment. The seed coats and endosperm are favourable structures for the protection of the embryo throughout its development, its conservation till germination and seedling emergence. During germination sensu stricto, from water uptake to radicle protrusion, the seed releases exudates on its tegument surface consisting of complex mixtures of organic and inorganic molecules. While many studies previously described exudates from plant tissues (e.g. root, stem, leaves), the scientific literature is quite limited concerning exudates from germinating seeds. Plant exudates have been described to have functional properties such as antimicrobial or antioxidant activities. Our preliminary works indicated that the germinating seed released many metabolites, peptides, proteins and small RNAs within the early hours after imbibition. The objective of the thesis will address the characterization of the germinating seeds exudates and the identification of molecules displaying bioactivities on the biotic environment and / or on the seed embryo to improve its vigour. The results of this work will be included in prospective studies on research of new products derived from plants for seed treatment applications (e.g. coating, pelleting or priming). 


Lab: Institut Jean-Pierre Bourgin (IJPB), PHYGERM Team, Versailles (France)

Supervisors: Loïc Rajjou(

Graduate school: ABIES

Starting date: October 2021 (Deadline: April 18- May 27)


To apply online, click here or send cover letter and CVs to