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Auxin Response Factor2 (ARF2) and Its Regulated Homeodomain Gene HB33 Mediate Abscisic Acid Response in Arabidopsis
Open accessAbstract
The phytohormone abscisic acid (ABA) is an important regulator of plant development and response to environmental stresses. In this study, we identified two ABA overly sensitive mutant alleles in a gene encoding Auxin Response Factor2 (ARF2). The expression of ARF2 was induced by ABA treatment. The arf2 mutants showed enhanced ABA sensitivity in seed germination and primary root growth. In contrast, the primary root growth and seed germination of transgenic plants over-expressing ARF2 are less inhibited by ABA than that of the wild type. ARF2 negatively regulates the expression of a homeodomain gene HB33, the expression of which is reduced by ABA. Transgenic plants over-expressing HB33 are more sensitive, while transgenic plants reducing HB33 by RNAi are more resistant to ABA in the seed germination and primary root growth than the wild type. ABA treatment altered auxin distribution in the primary root tips and made the relative, but not absolute, auxin accumulation or auxin signal around quiescent centre cells and their surrounding columella stem cells to other cells stronger in arf2-101 than in the wild type. These results indicate that ARF2 and HB33 are novel regulators in the ABA signal pathway, which has crosstalk with auxin signal pathway in regulating plant growth.
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Citations
Cites
Auxin-responsive gene expression: genes, promoters and regulatory factors
Hagen, G., & Guilfoyle, T. (2002) · Plant Molecular Biology · doi:10.1023/a:1015207114117 · Cited by 1,262
Strigolactone Acts Downstream of Auxin to Regulate Bud Outgrowth in Pea and Arabidopsis
Brewer, P. B., Dun, E. A., Ferguson, B. J., Rameau, C., & Beveridge, C. A. (2009) · PLANT PHYSIOLOGY · doi:10.1104/pp.108.134783 · Cited by 418 · cited 2×
“The plant materials used in this study were: abi1-1 (Landsberg accession) [4], abi2-1 (Landsberg accession) [68], abi3-1 (Landsberg accession) [69], abi4-1 (Columbia accession) [19], abi5-1 (Columbia accession) [19], tir1 afb1 afb2 afb3 quadruple mutant [36], proCYCB1;1::GUS [18], pin2_151A5.”
Background
Cited by
Abscisic Acid Synthesis and Response
Finkelstein, R. (2013) · The Arabidopsis Book · doi:10.1199/tab.0166 · Cited by 1,154
Two Faces of One Seed: Hormonal Regulation of Dormancy and Germination
Shu, K., Liu, X.-D., Xie, Q., & He, Z.-H. (2016) · Molecular Plant · doi:10.1016/j.molp.2015.08.010 · Cited by 1,075
Liu, X., Zhang, H., Zhao, Y., Feng, Z., Li, Q., Yang, H.-Q., Luan, S., Li, J., & He, Z.-H. (2013) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1304651110 · Cited by 600
ZmbZIP4 Contributes to Stress Resistance in Maize by Regulating ABA Synthesis and Root Development
Ma, H., Liu, C., Li, Z., Ran, Q., Xie, G., Wang, B., Fang, S., Chu, J., & Zhang, J. (2018) · Plant Physiology · doi:10.1104/pp.18.00436 · Cited by 309
Metadata
- Authors
- Wang, L., Hua, D., He, J., Duan, Y., Chen, Z., Hong, X., & Gong, Z.
- Venue
- PLoS Genetics
- Publisher
- Public Library of Science (PLoS)
- Published
- 2011-07-14
- Volume
- 7
- Issue
- 7
- Pages
- e1002172
- ISSN
- 1553-7390 (ISSN-L)
- 1553-7404
- OpenAlex
- W2083886168
- Cited by
- 283
- References
- 2
- FWCI
- 15.98
- Type
- journal article
- Language
- en
- Open access
- gold
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- Wang, L., Hua, D., He, J., Duan, Y., Chen, Z., Hong, X., & Gong, Z. (2011). Auxin Response Factor2 (ARF2) and Its Regulated Homeodomain Gene HB33 Mediate Abscisic Acid Response in Arabidopsis. PLoS Genetics. https://doi.org/10.1371/journal.pgen.1002172
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