Endogenous Hypoxia in Lateral Root Primordia Controls Root Architecture by Antagonizing Auxin Signaling in Arabidopsis
Language English Country England, Great Britain Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
30641154
DOI
10.1016/j.molp.2019.01.007
PII: S1674-2052(19)30012-7
Knihovny.cz E-resources
- Keywords
- Arabidopsis, ERF-VII, auxin, hypoxia, lateral root, root development,
- MeSH
- Arabidopsis cytology genetics metabolism MeSH
- Cell Hypoxia MeSH
- Plant Roots cytology MeSH
- Indoleacetic Acids metabolism MeSH
- Arabidopsis Proteins metabolism MeSH
- Gene Expression Regulation, Plant MeSH
- Signal Transduction * MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Indoleacetic Acids MeSH
- Arabidopsis Proteins MeSH
As non-photosynthesizing organs, roots are dependent on diffusion of oxygen from the external environment and, in some instances, from the shoot for their aerobic metabolism. Establishment of hypoxic niches in the developing tissues of plants has been postulated as a consequence of insufficient diffusion of oxygen to satisfy the demands throughout development. Here, we report that such niches are established at specific stages of lateral root primordia development in Arabidopsis thaliana grown under aerobic conditions. Using gain- and loss-of-function mutants, we show that ERF-VII transcription factors, which mediate hypoxic responses, control root architecture by acting in cells with a high level of auxin signaling. ERF-VIIs repress the expression of the auxin-induced genes LBD16, LBD18, and PUCHI, which are essential for lateral root development, by binding to their promoters. Our results support a model in which the establishment of hypoxic niches in the developing lateral root primordia contributes to the shutting down of key auxin-induced genes and regulates the production of lateral roots.
Biology Department University of Pisa Pisa Italy
Institute of Life Sciences Scuola Superiore Sant'Anna Pisa Italy
References provided by Crossref.org
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