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ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Plant Pathogen Interactions
Volume 16 - 2025 | doi: 10.3389/fpls.2025.1513301

Identification of plant resistance inducers and evaluation of genotype receptivity for carrot protection against Alternaria leaf blight

Provisionally accepted
Valérie Le Clerc Valérie Le Clerc 1*Sitti Anlati Moussa Sitti Anlati Moussa 1*Anita Suel Anita Suel 1*Claude Emmanuel Koutouan Claude Emmanuel Koutouan 1*Angelina Elghaziri Angelina Elghaziri 1Matthieu Gaucher Matthieu Gaucher 2Marie-Noelle Brisset Marie-Noelle Brisset 2*Mathilde Briard Mathilde Briard 1Emmanuel Geoffriau Emmanuel Geoffriau 1*
  • 1 Institut Agro, INRAE, Université d'Angers, IRHS, SFR 4207 QUASAV, Angers cedex 01, France
  • 2 INRAE, Institut Agro, Université d'Angers, IRHS, SFR 4207 QUASAV, Angers, Pays de la Loire, France

The final, formatted version of the article will be published soon.

    The use of biopesticides represents an alternative strategy to synthetic chemical products for crop protection. To promote their adoption and effective use by growers, it is crucial to understand their modes of action and the optimal conditions for their application in crops, including their compatibility with specific varieties. Through a series of greenhouse experiments, this study describes the development and validation of a robust molecular diagnostic tool for enabling the evaluation of defence gene activation. The results identified plant resistance inducers (PRI) among biopesticide products capable of protecting carrots against Alternaria leaf blight. By applying a PRI to a range of carrot varieties exhibiting varying levels of resistance to Alternaria dauci, preliminary findings on plant receptivity suggest that the efficacy of PRIs in conferring protection is highly dependent on the treated variety. Two distinct genotype-dependent effects wer observed: sensitivity to the PRI and an enhancement of resistance. This study offers new insights into optimizing biopesticide use in carrot cultivation.

    Keywords: Daucus carota L., Quantitative real-time PCR (qPCR), Defence gene, Plant resistance, Alternaria dauci, crop sustainability

    Received: 18 Oct 2024; Accepted: 08 Jan 2025.

    Copyright: © 2025 Le Clerc, Moussa, Suel, Koutouan, Elghaziri, Gaucher, Brisset, Briard and Geoffriau. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Valérie Le Clerc, Institut Agro, INRAE, Université d'Angers, IRHS, SFR 4207 QUASAV, Angers cedex 01, France
    Sitti Anlati Moussa, Institut Agro, INRAE, Université d'Angers, IRHS, SFR 4207 QUASAV, Angers cedex 01, France
    Anita Suel, Institut Agro, INRAE, Université d'Angers, IRHS, SFR 4207 QUASAV, Angers cedex 01, France
    Claude Emmanuel Koutouan, Institut Agro, INRAE, Université d'Angers, IRHS, SFR 4207 QUASAV, Angers cedex 01, France
    Marie-Noelle Brisset, INRAE, Institut Agro, Université d'Angers, IRHS, SFR 4207 QUASAV, Angers, Pays de la Loire, France
    Emmanuel Geoffriau, Institut Agro, INRAE, Université d'Angers, IRHS, SFR 4207 QUASAV, Angers cedex 01, France

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.