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OPDA, more than just a jasmonate precursor.

Guillermo H Jimenez Aleman1, Venkatesh P Thirumalaikumar1, Georg Jander1

  • 1Boyce Thompson Institute, Ithaca, NY, 14853, USA.

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12-oxo-phytodienoic acid (OPDA) is a plant signaling molecule involved in defense, stress, and growth. It acts independently of jasmonates and influences gene expression via TGA transcription factors.

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Area of Science:

  • Plant Biology
  • Molecular Signaling
  • Biochemistry

Background:

  • 12-oxo-phytodienoic acid (OPDA) is a key oxylipin in plants.
  • It serves as a precursor to the plant hormone jasmonic acid (JA).
  • OPDA also exhibits jasmonate-independent functions in various plant processes.

Purpose of the Study:

  • To summarize current knowledge on OPDA metabolism and signaling.
  • To discuss OPDA's roles in both jasmonate-dependent and independent pathways.
  • To highlight open research questions regarding OPDA.

Main Methods:

  • Literature review and synthesis of existing research on OPDA.
  • Discussion of OPDA biosynthesis, signaling pathways, and biological functions.
  • Identification of knowledge gaps in OPDA research.

Main Results:

  • OPDA is synthesized in plastids from alpha-linolenic acid.
  • OPDA binding to plastidial cyclophilins activates TGA transcription factors.
  • OPDA participates in plant defense, stress responses, growth, and development.

Conclusions:

  • OPDA is a versatile signaling molecule with critical roles in plant life.
  • Further research is needed to fully elucidate OPDA's interactome and the functions of its conjugates.