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Omega hydroxylated JA-Ile is an endogenous bioactive jasmonate that signals through the canonical jasmonate signaling pathway

  • Guillermo H. Jimenez-Aleman
  • , Marilia Almeida-Trapp
  • , Gemma Fernández-Barbero
  • , Selena Gimenez-Ibanez
  • , Michael Reichelt
  • , Jyothilakshmi Vadassery
  • , Axel Mithöfer
  • , Julio Caballero
  • , Wilhelm Boland
  • , Roberto Solano

Research output: Contribution to journalArticlepeer-review

Abstract

Jasmonates are fatty acid derivatives that control several plant processes including growth, development and defense. Despite the chemical diversity of jasmonates, only jasmonoyl-L-isoleucine (JA-Ile) has been clearly characterized as the endogenous ligand of the jasmonate co-receptors (COI1-JAZs) in higher plants. Currently, it is accepted that ω-hydroxylation of JA-Ile leads to inactivation of the molecule. This study shows that ω-hydroxylated JA-Ile (12-OH-JA-Ile) retains bioactivity and signals through the canonical JA-pathway. The results suggest that 12-OH-JA-Ile differentially activates a subset of JA-Ile co-receptors that may control and/or modulate particular jasmonate dependent responses. It is proposed that after a strong immune response mediated by JA-Ile, the ω-hydroxylated form modulates JA-Ile activated processes thereby improving plant resilience.

Original languageEnglish (US)
Article number158520
JournalBiochimica et Biophysica Acta - Molecular and Cell Biology of Lipids
Volume1864
Issue number12
DOIs
StatePublished - Dec 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cell Biology

Keywords

  • Fatty acids
  • Jasmonate
  • Oxylipin
  • Phytohormone
  • ω-Hydroxylation

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