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Wide-Field, Real-Time Imaging of Local and Systemic Wound Signals in Arabidopsis
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Ethylene signaling in plants.

Brad M Binder1

  • 1Department of Biochemistry and Cellular & Molecular Biology, University of Tennessee, Knoxville, Tennessee, USA bbinder@utk.edu.

The Journal of Biological Chemistry
|April 26, 2020
PubMed
Summary

Ethylene, a plant hormone, regulates growth and stress responses. Its signaling pathway, including receptors and transcription factors, controls key plant development processes like the triple response.

Keywords:
Arabidopsis thalianabioengineeringconstitutive triple response 1 (CTR1)ethyleneethylene-insensitive 2 (EIN2)hormone receptorphytohormoneplant hormonesignal transductionsignaling

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Ethylene is a crucial gaseous phytohormone regulating plant development, growth, and stress responses.
  • The triple response in eudicot seedlings is a key observable phenotype used to study ethylene's effects.

Purpose of the Study:

  • To review the current understanding of ethylene signaling pathways in plants.
  • To explore both canonical and alternative ethylene signaling cascades.
  • To discuss the agricultural and horticultural applications of manipulating ethylene signaling.

Main Methods:

  • Review of existing literature on ethylene signaling.
  • Analysis of genetic screens identifying components of the ethylene pathway.
  • Discussion of established models of ethylene signal transduction.

Main Results:

  • Identification of key ethylene signaling components: receptors, CTR1, EIN2, EIN3, EIL, and ERFs.
  • Elucidation of a canonical linear signaling model where ethylene acts as an inverse agonist.
  • Recognition of alternative pathways that also influence ethylene responses.

Conclusions:

  • The canonical ethylene signaling pathway involves receptors, CTR1, and EIN2, leading to transcriptional changes.
  • Alternative signaling pathways contribute to the complexity of ethylene responses.
  • Understanding ethylene signaling offers potential for agricultural and horticultural improvements.