期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 115, 期 20, 页码 E4710-E4719出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1804233115
关键词
ROS; transcriptional regulation; root development; lipid transfer; plant immune response
资金
- Japan Science and Technology Agency Precursory Research for Embryonic Science and Technology Grant [20115]
- Ministry of Education, Culture, Sports, Science, and Technology [26113508]
- Grants-in-Aid for Scientific Research [26113508, 16H01238] Funding Source: KAKEN
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.
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