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A Gain-of-Function Mutation in IAA28 Suppresses Lateral Root Development
Open accessAbstract
The phytohormone auxin is important in many aspects of plant development. We have isolated an auxin-resistant Arabidopsis mutant, iaa28-1, that is severely defective in lateral root formation and that has diminished adult size and decreased apical dominance. The iaa28-1 mutant is resistant to inhibition of root elongation by auxin, cytokinin, and ethylene, but it responds normally to other phytohormones. We identified the gene defective in the iaa28-1 mutant by using a map-based positional approach and found it to encode a previously uncharacterized member of the Aux/IAA gene family. IAA28 is preferentially expressed in roots and inflorescence stems, and in contrast to other Aux/IAA genes, IAA28 transcription is not induced by exogenous auxin. Studies of the gain-of-function iaa28-1 mutant suggest that IAA28 normally represses transcription, perhaps of genes that promote lateral root initiation in response to auxin signals.
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Citations
Cited by
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
Okushima, Y., Overvoorde, P. J., Arima, K., Alonso, J. M., Chan, A., Chang, C., Ecker, J. R., Hughes, B., Lui, A., Nguyen, D., et al. (2005) · The Plant Cell · doi:10.1105/tpc.104.028316 · Cited by 1,122
A novel sensor to map auxin response and distribution at high spatio-temporal resolution
Brunoud, G., Wells, D. M., Oliva, M., Larrieu, A., Mirabet, V., Burrow, A. H., Beeckman, T., Kepinski, S., Traas, J., Bennett, M. J., et al. (2012) · Nature · doi:10.1038/nature10791 · Cited by 741
Dissecting Arabidopsis lateral root development
Casimiro, I., Beeckman, T., Graham, N., Bhalerao, R., Zhang, H., Casero, P., Sandberg, G., & Bennett, M. J. (2003) · Trends in Plant Science · doi:10.1016/s1360-1385(03)00051-7 · Cited by 683
Auxin Receptors and Plant Development: A New Signaling Paradigm
Mockaitis, K., & Estelle, M. (2008) · Annual Review of Cell and Developmental Biology · doi:10.1146/annurev.cellbio.23.090506.123214 · Cited by 651
Metadata
- Authors
- Rogg, L. E., Lasswell, J., & Bartel, B.
- Venue
- The Plant Cell
- Publisher
- Oxford University Press (OUP)
- Published
- 2001-03
- Volume
- 13
- Issue
- 3
- Pages
- 465-480
- ISSN
- 1040-4651 (ISSN-L)
- 1532-298X
- OpenAlex
- W2122372286
- Cited by
- 419
- References
- 0
- FWCI
- 29.14
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Rogg, L. E., Lasswell, J., & Bartel, B. (2001). A Gain-of-Function Mutation in IAA28 Suppresses Lateral Root Development. The Plant Cell. https://doi.org/10.1105/tpc.13.3.465
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