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Thinking outside the F-box: how UFO controls angiosperm development.

Philippe Rieu1, Moïra Arnoux-Courseaux1, Gabrielle Tichtinsky1

  • 1Laboratoire Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, CEA, INRAE, IRIG-DBSCI-LPCV, 17 ave des martyrs, F-38054, Grenoble, France.

The New Phytologist
|September 4, 2023
PubMed
Summary

The UNUSUAL FLORAL ORGANS (UFO) protein acts as a key cofactor in flower development, working with the LEAFY transcription factor. This interaction redirects LEAFY to new DNA targets, influencing floral gene regulation across angiosperms.

Keywords:
LEAFYUFOevolution of developmentflower and inflorescence developmenttranscriptional regulation

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Area of Science:

  • Plant biology
  • Genetics
  • Developmental biology

Background:

  • Flower and inflorescence development is crucial for angiosperm reproduction.
  • LEAFY transcription factor and UNUSUAL FLORAL ORGANS (UFO) protein are key regulators of floral development.
  • UFO's precise role has been a subject of ongoing research.

Purpose of the Study:

  • To review the diverse roles of UFO in flower development across various angiosperm species.
  • To integrate recent findings on UFO's function as a transcriptional cofactor.
  • To identify critical unanswered questions in the field.

Main Methods:

  • Literature review of genetic studies on floral development.
  • Analysis of UFO's interaction with the LEAFY transcription factor.
  • Comparative analysis of UFO function across different plant species.

Main Results:

  • UFO functions as a transcriptional cofactor, modulating LEAFY's activity.
  • UFO redirects LEAFY to specific cis-regulatory elements, influencing gene expression.
  • Evidence suggests conserved and divergent roles of UFO in different angiosperms.

Conclusions:

  • UFO plays a significant role in floral gene regulation by partnering with LEAFY.
  • Understanding UFO-LEAFY interactions provides insights into the evolution of flower development.
  • Further research is needed to fully elucidate UFO's mechanisms and regulatory networks.