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Proc Natl Acad Sci U S A. 2018 May 15;115(20):E4710-E4719. doi: 10.1073/pnas.1804233115. Epub 2018 Apr 30.

MYB30 links ROS signaling, root cell elongation, and plant immune responses.

Author information

1
Graduate School of Bioagricultural Science, Nagoya University, Nagoya, 464-8602 Aichi, Japan.
2
Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya, 464-8602 Aichi, Japan.
3
Department of Biological Chemistry, College of Bioscience and Biotechnology, Chubu University, Kasugai, 478-8501 Aichi, Japan.
4
Exploratory Research for Advanced Technology Higashiyama Live-Holonics Project, Nagoya University, Nagoya, 464-8602 Aichi, Japan.
5
The Center for Gene Research, Nagoya University, Nagoya, 464-8602 Aichi, Japan.
6
Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Kawaguchi, 332-0022 Saitama, Japan.
7
Faculty of Agriculture, Meijo University, Nagoya, 468-8502 Aichi, Japan.
8
Institute of Transformative Bio-Molecules, Nagoya University, Nagoya, 464-8602 Aichi, Japan.
9
Plant Molecular and Cellular Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037.
10
The Center for Gene Research, Nagoya University, Nagoya, 464-8602 Aichi, Japan; thiro@meijo-u.ac.jp.

Abstract

Reactive oxygen species (ROS) are known to be important signal molecules that are involved in biotic and abiotic stress responses as well as in growth regulation. However, the molecular mechanisms by which ROS act as a growth regulator, as well as how ROS-dependent growth regulation relates to its roles in stress responses, are not well understood. We performed a time-course microarray analysis of Arabidopsis root tips upon treatment with hydrogen peroxide, which we named "ROS-map." Using the ROS-map, we identified an MYB transcription factor, MYB30, which showed a strong response to ROS treatment and is the key regulator of a gene network that leads to the hydrogen peroxide-dependent inhibition of root cell elongation. Intriguingly, this network contained multiple genes involved in very-long-chain fatty acid (VLCFA) transport. Finally, we showed that MYB30 is necessary for root growth regulation during defense responses, thus providing a molecular link between these two ROS-associated processes.

KEYWORDS:

ROS; lipid transfer; plant immune response; root development; transcriptional regulation

PMID:
29712840
PMCID:
PMC5960331
DOI:
10.1073/pnas.1804233115
[Indexed for MEDLINE]
Free PMC Article

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