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Molecular oxygen as a signaling component in plant development
Daan A Weits1, Joost T van Dongen2, Francesco Licausi1,3
1Plantlab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, 56010, Italy.
The New Phytologist
|January 17, 2020
Summary
Molecular oxygen, once seen only as a stress factor, is now recognized as a key signaling molecule in plant development. This review highlights oxygen
Area of Science:
- Plant Biology
- Molecular Biology
- Developmental Biology
Background:
- Hypoxia, or low oxygen, is traditionally linked to flooding stress.
- Recent research reveals molecular oxygen availability influences plant development.
- Endogenous hypoxic niches exist in proliferating plant cells.
Purpose of the Study:
- To review recent findings on oxygen-regulated plant development.
- To discuss the role of oxygen signaling in plant growth.
- To highlight outstanding questions in oxygen biology.
Main Methods:
- Review of recent scientific literature.
- Analysis of the N-degron pathway's role in oxygen sensing.
- Focus on Ethylene Response Factor-VII (ERF-VII) family.
Main Results:
- Oxygen acts as a signaling molecule in plant development and metabolism.
- The Cys/Arg N-degron pathway integrates oxygen levels.
- ERF-VII proteins are key regulators of root development and seedling establishment.
- Vernalization 2 (VRN2) and Little Zipper 2 (ZPR2) are novel substrates linking oxygen to meristem activity and reproduction.
Conclusions:
- Molecular oxygen plays a crucial role in various plant developmental processes.
- Distinguishing between acute stress hypoxia and chronic developmental hypoxia is important.
- Further research is needed to fully understand oxygen's signaling functions in plants.
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