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Is Exogenous Fatty Acid Hydroperoxide Perception as Elicitor Related to Modulation of Plant Plasma Membrane Structure ?
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  • Estelle Deboever,
  • Géraldine van Aubel,
  • Valeria Rondelli,
  • Alexandros Koutsioumpas,
  • Marion Mathelie-Guinlet,
  • Yves Dufrêne,
  • Marc Ongena,
  • Laurence Lins,
  • Pierre Van Cutsem,
  • Marie-Laure Fauconnier,
  • Magali Deleu
Estelle Deboever
University of Liege

Corresponding Author:[email protected]

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Géraldine van Aubel
Fytofend S.A.
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Valeria Rondelli
Università degli Studi di Milano
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Alexandros Koutsioumpas
Heinz Maier-Leibnitz Zentrum
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Marion Mathelie-Guinlet
Université catholique de Louvain
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Yves Dufrêne
Université catholique de Louvain
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Marc Ongena
University of Liege
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Laurence Lins
University of Liege
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Pierre Van Cutsem
Université de Namur Departement de Biologie
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Marie-Laure Fauconnier
University of Liege
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Magali Deleu
University of Liege
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Oxylipins are lipid-derived molecules that are ubiquitous in eukaryotes and whose functions in plant physiology have been widely reported. They appear to play a major role in plant immunity by orchestrating reactive oxygen species (ROS) and hormone-dependent signalling pathways. The present work focuses on the specific case of fatty acid hydroperoxides (HPOs). Although some studies report their potential use as exogenous biocontrol agents for plant protection, evaluation of their efficiency in planta is lacking and no information is available about their mechanism of action. In this work, the potential of 13(S)-hydroperoxyoctadeca-(9Z,11E)-dienoic acid (13-HPOD) and 13(S)-hydroperoxy-(9Z,11E,15Z)-octadecatrienoic acid (13-HPOT), as plant defence elicitors and the underlying mechanism of action are investigated. Arabidopsis thaliana leaf resistance to Botrytis cinerea was observed after root application with HPOs. They also activate early immunity-related defence responses, like ROS. As previous studies have demonstrated their ability to interact with plant plasma membranes (PPM), we have further investigated the effects of HPOs on biomimetic PPM structure using complementary biophysics tools. Results show that HPO insertion into PPM impacts its global structure without solubilizing it. Relationship between biological assays and biophysical analysis suggests that lipid amphiphilic elicitors that directly act on membrane lipids might trigger early plant defence events
29 Sep 2021Submitted to Plant, Cell & Environment
29 Sep 2021Submission Checks Completed
29 Sep 2021Assigned to Editor
29 Sep 2021Reviewer(s) Assigned
13 Oct 2021Review(s) Completed, Editorial Evaluation Pending
18 Oct 2021Editorial Decision: Revise Minor
10 Nov 20211st Revision Received
10 Nov 2021Submission Checks Completed
10 Nov 2021Assigned to Editor
16 Nov 2021Review(s) Completed, Editorial Evaluation Pending
16 Nov 2021Editorial Decision: Accept