Communication Dans Un Congrès Année : 2023

Activation of seed defenses through defense priming

Résumé

Yield losses due to seedborne pathogens have a major economic impact on the global food market. We attempted to develop sustainable strategies to stimulate pathogen resistance from the seed that have a negligeable impact on seed quality parameters, such as germination rate and homogeneity. Our approach consisted in applying defense priming treatments using plant resistance inducers (PRI) such as methyl jasmonate (MeJA) and β-aminobutyric acid (BABA) on developing or mature seeds. After a first stage of technique optimization, results from tomato and bean treated seeds showed extensive transcriptome reprogramming, with a strong effect on defense pathways. To correlate these data with pathogen resistance, we analysed developing and germinating seeds treated with different PRIs and their effects on the growth of different pathogens including bacteria and fungi. First results obtained on tomato showed a marked growth inhibition on A. brassicicola from specific PRI-treated seeds, while the effect on C. michiganensis was minor. Our next step is, now, the identification of the molecules responsible of the fungistatic effect present in treated seeds.
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Dates et versions

hal-04665344 , version 1 (31-07-2024)

Identifiants

  • HAL Id : hal-04665344 , version 1

Citer

Jerome Verdier, Łukasz Paweł Tarkowski, Armelle Darrasse, David Lalanne, Muriel Marchi, et al.. Activation of seed defenses through defense priming. International Conference in Plant Pathology (ICPP), Aug 2023, Lyon, France. ⟨hal-04665344⟩
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