The bHLH Transcription Factor HBI1 Mediates the Trade-Off between Growth and Pathogen-Associated Molecular Pattern-Triggered Immunity in Arabidopsis
- Authors
- Fan, Min; Bai, Ming-Yi; Kim, Jung-Gun; Wang, Tina; Oh, Eunkyoo; Chen, Lawrence; Park, Chan Ho; Son, Seung-Hyun; Kim, Seong-Ki; Mudgett, Mary Beth; Wang, Zhi-Yong
- Issue Date
- Feb-2014
- Publisher
- AMER SOC PLANT BIOLOGISTS
- Citation
- PLANT CELL, v.26, no.2, pp 828 - 841
- Pages
- 14
- Journal Title
- PLANT CELL
- Volume
- 26
- Number
- 2
- Start Page
- 828
- End Page
- 841
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/12558
- DOI
- 10.1105/tpc.113.121111
- ISSN
- 1040-4651
1532-298X
- Abstract
- The trade-off between growth and immunity is crucial for survival in plants. However, the mechanism underlying growth-immunity balance has remained elusive. The PRE-IBH1-HBI1 tripartite helix-loop-helix/basic helix-loop-helix module is part of a central transcription network that mediates growth regulation by several hormonal and environmental signals. Here, genome-wide analyses of HBI1 target genes show that HBI1 regulates both overlapping and unique targets compared with other DNA binding components of the network in Arabidopsis thaliana, supporting a role in specifying network outputs and fine-tuning feedback regulation. Furthermore, HBI1 negatively regulates a subset of genes involved in immunity, and pathogen-associated molecular pattern (PAMP) signals repress HBI1 transcription. Constitutive overexpression and loss-of-function experiments show that HBI1 inhibits PAMP-induced growth arrest, defense gene expression, reactive oxygen species production, and resistance to pathogen. These results show that HBI1, as a component of the central growth regulation circuit, functions as a major node of crosstalk that mediates a trade-off between growth and immunity in plants.
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Collections - College of Natural Sciences > Department of Life Science > 1. Journal Articles
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