Eicosapentaenoic acid: New insights into an oomycete-driven elicitor to enhance grapevine immunity.

Autor: Laureano G; Grapevine Pathogen Systems lab, BioISI, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisbon, Portugal; BioISI-Biosystems & Integrative Sciences Institute, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisbon, Portugal. Electronic address: gmlaureano@ciencias.ulisboa.pt., Matos AR; BioISI-Biosystems & Integrative Sciences Institute, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisbon, Portugal; Departamento de Biologia Vegetal, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisbon, Portugal., Figueiredo A; Grapevine Pathogen Systems lab, BioISI, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisbon, Portugal; BioISI-Biosystems & Integrative Sciences Institute, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisbon, Portugal; Departamento de Biologia Vegetal, Faculdade de Ciências da Universidade de Lisboa, 1749-016, Lisbon, Portugal.
Jazyk: angličtina
Zdroj: Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2024 Aug; Vol. 213, pp. 108799. Date of Electronic Publication: 2024 Jun 05.
DOI: 10.1016/j.plaphy.2024.108799
Abstrakt: The widespread use of pesticides in agriculture remains a matter of major concern, prompting a critical need for alternative and sustainable practices. To address this, the use of lipid-derived molecules as elicitors to induce defence responses in grapevine plants was accessed. A Plasmopara viticola fatty acid (FA), eicosapentaenoic acid (EPA) naturally present in oomycetes, but absent in plants, was applied by foliar spraying to the leaves of the susceptible grapevine cultivar (Vitis vinifera cv. Trincadeira), while a host lipid derived phytohormone, jasmonic acid (JA) was used as a molecule known to trigger host defence. Their potential as defence triggers was assessed by analysing the expression of a set of genes related to grapevine defence and evaluating the FA modulation upon elicitation. JA prompted grapevine immunity, altering lipid metabolism and up-regulating the expression of several defence genes. EPA also induced a myriad of responses to the levels typically observed in tolerant plants. Its application activated the transcription of defence gene's regulators, pathogen-related genes and genes involved in phytoalexins biosynthesis. Moreover, EPA application resulted in the alteration of the leaf FA profile, likely by impacting biosynthetic, unsaturation and turnover processes. Although both molecules were able to trigger grapevine defence mechanisms, EPA induced a more robust and prolonged response. This finding establishes EPA as a promising elicitor for an effectively managing grapevine downy mildew diseases.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Masson SAS.. All rights reserved.)
Databáze: MEDLINE
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