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REVIEW
Expansion and innovation in auxin signaling: where do we grow from here?
Román Ramos Báez, Jennifer L. Nemhauser
Development 2021 148: dev187120 doi: 10.1242/dev.187120 Published 12 March 2021
Román Ramos Báez
University of Washington, Department of Biology, Seattle, WA 98105-1800, USA
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  • For correspondence: rramosb@uw.edu jn7@uw.edu
Jennifer L. Nemhauser
University of Washington, Department of Biology, Seattle, WA 98105-1800, USA
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ABSTRACT

The phytohormone auxin plays a role in almost all growth and developmental responses. The primary mechanism of auxin action involves the regulation of transcription via a core signaling pathway comprising proteins belonging to three classes: receptors, co-receptor/co-repressors and transcription factors. Recent studies have revealed that auxin signaling can be traced back at least as far as the transition to land. Moreover, studies in flowering plants have highlighted how expansion of the gene families encoding auxin components is tied to functional diversification. As we review here, these studies paint a picture of auxin signaling evolution as a driver of innovation.

Footnotes

  • Competing interests

    The authors declare no competing or financial interests.

  • Funding

    Work in our group on evolution of auxin response is supported by the National Science Foundation (IOS-1546873), the National Institutes of Health (R01-GM107084) and a Howard Hughes Medical Institute Faculty Scholar Award. R.R.B. is additionally supported by a Howard Hughes Medical Institute Gilliam Fellowship (GT11355). Deposited in PMC for release after 12 months.

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Keywords

  • Marchantia polymorpha
  • Physcomitrium patens
  • Arabidopsis thaliana
  • Zea mays
  • Evo-devo
  • Auxin response

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REVIEW
Expansion and innovation in auxin signaling: where do we grow from here?
Román Ramos Báez, Jennifer L. Nemhauser
Development 2021 148: dev187120 doi: 10.1242/dev.187120 Published 12 March 2021
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REVIEW
Expansion and innovation in auxin signaling: where do we grow from here?
Román Ramos Báez, Jennifer L. Nemhauser
Development 2021 148: dev187120 doi: 10.1242/dev.187120 Published 12 March 2021

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  • Top
  • Article
    • ABSTRACT
    • Introduction
    • The auxin signaling pathway emerged with the transition to land
    • Evolving complexity in signaling components enables diversity in plant form
    • Conclusions and future perspectives
    • Acknowledgements
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