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The Mg-Chelatase H Subunit of Arabidopsis Antagonizes a Group of WRKY Transcription Repressors to Relieve ABA-Responsive Genes of Inhibition
Open accessAbstract
The phytohormone abscisic acid (ABA) plays a vital role in plant development and response to environmental challenges, but the complex networks of ABA signaling pathways are poorly understood. We previously reported that a chloroplast protein, the magnesium-protoporphyrin IX chelatase H subunit (CHLH/ABAR), functions as a receptor for ABA in Arabidopsis thaliana. Here, we report that ABAR spans the chloroplast envelope and that the cytosolic C terminus of ABAR interacts with a group of WRKY transcription factors (WRKY40, WRKY18, and WRKY60) that function as negative regulators of ABA signaling in seed germination and postgermination growth. WRKY40, a central negative regulator, inhibits expression of ABA-responsive genes, such as ABI5. In response to a high level of ABA signal that recruits WRKY40 from the nucleus to the cytosol and promotes ABAR–WRKY40 interaction, ABAR relieves the ABI5 gene of inhibition by repressing WRKY40 expression. These findings describe a unique ABA signaling pathway from the early signaling events to downstream gene expression.
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Liu, Q., Kasuga, M., Sakuma, Y., Abe, H., Miura, S., Yamaguchi-Shinozaki, K., & Shinozaki, K. (1998) · The Plant Cell · doi:10.1105/tpc.10.8.1391 · Cited by 3,044
A gate–latch–lock mechanism for hormone signalling by abscisic acid receptors
Melcher, K., Ng, L.-M., Zhou, X. E., Soon, F.-F., Xu, Y., Suino-Powell, K. M., Park, S.-Y., Weiner, J. J., Fujii, H., Chinnusamy, V., et al. (2009) · Nature · doi:10.1038/nature08613 · Cited by 731
Cited by
Skubacz, A., Daszkowska-Golec, A., & Szarejko, I. (2016) · Frontiers in Plant Science · doi:10.3389/fpls.2016.01884 · Cited by 499
Transcriptional regulation of drought response: a tortuous network of transcriptional factors
Singh, D., & Laxmi, A. (2015) · Frontiers in Plant Science · doi:10.3389/fpls.2015.00895 · Cited by 462
An Updated Overview on the Regulation of Seed Germination
Carrera-Castaño, G., Calleja-Cabrera, J., Pernas, M., Gómez, L., & Oñate-Sánchez, L. (2020) · Plants · doi:10.3390/plants9060703 · Cited by 269
Tsuzuki, T., Takahashi, K., Inoue, S.-I., Okigaki, Y., Tomiyama, M., Hossain, M. A., Shimazaki, K.-I., Murata, Y., & Kinoshita, T. (2011) · Journal of Plant Research · doi:10.1007/s10265-011-0426-x · Cited by 83
“…factors (WRKY40, WRKY18, and WRKY60) in cch mutant has shown to rescue ABA-insensitive phenotypes of cch, including stomatal movements, seed germination and postgermination growth, suggesting that these WRKY transcription factors function as negative regulators of ABA signaling (Shang et al. 2010).”
Metadata
- Authors
- Shang, Y., Yan, L., Liu, Z.-Q., Cao, Z., Mei, C., Xin, Q., Wu, F.-Q., Wang, X.-F., Du, S.-Y., Jiang, T., Zhang, X.-F., Zhao, R., Sun, H.-L., Liu, R., Yu, Y.-T., & Zhang, D.-P.
- Venue
- The Plant Cell
- Publisher
- Oxford University Press (OUP)
- Published
- 2010-06-01
- Volume
- 22
- Issue
- 6
- Pages
- 1909-1935
- ISSN
- 1040-4651 (ISSN-L)
- 1532-298X
- OpenAlex
- W2167751673
- Cited by
- 556
- References
- 2
- FWCI
- 40.02
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Shang, Y., Yan, L., Liu, Z.-Q., Cao, Z., Mei, C., Xin, Q., Wu, F.-Q., Wang, X.-F., Du, S.-Y., Jiang, T., Zhang, X.-F., Zhao, R., Sun, H.-L., Liu, R., Yu, Y.-T., & Zhang, D.-P. (2010). The Mg-Chelatase H Subunit of Arabidopsis Antagonizes a Group of WRKY Transcription Repressors to Relieve ABA-Responsive Genes of Inhibition. The Plant Cell. https://doi.org/10.1105/tpc.110.073874
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
