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Is specialized metabolite regulation specialized?

Daniel J Kliebenstein1

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Plant specialized metabolite regulation is more complex than previously thought. New research shows these compounds are highly integrated into plant development and signaling, involving numerous transcription factors.

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Area of Science:

  • Plant biology
  • Metabolomics
  • Molecular genetics

Background:

  • Advances in identifying specialized metabolite pathways outpace understanding of their regulation.
  • A common paradigm views specialized metabolite regulation as simple, involving few transcription factors and non-regulatory end-products.

Approach:

  • Reviewing studies on glucosinolate pathways in Brassicales to illustrate complex regulation.
  • Examining the integration of specialized metabolites into core plant pathways.

Key Points:

  • Specialized metabolites are highly integrated into plant metabolism, physiology, and development.
  • Pathway regulation involves an extended set of transcription factors, some co-evolving with the pathway.
  • Specialized metabolites can evolve regulatory roles, integrating into plant signaling networks.

Conclusions:

  • The regulation of specialized metabolites is intricate and interconnected with core plant processes.
  • A revised perspective is needed to integrate specialized metabolism into broader plant regulatory networks.