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Control of auxin-regulated root development by the Arabidopsis thaliana SHY2/IAA3 gene
Open accessAbstract
The plant hormone auxin controls many aspects of development and acts in part by inducing expression of various genes. Arabidopsis thaliana semidominant shy2 (short hypocotyl) mutations cause leaf formation in dark-grown plants, suggesting that SHY2 has an important role in regulating development. Here we show that the SHY2 gene encodes IAA3, a previously known member of the Aux/IAA family of auxin-induced genes. Dominant shy2 mutations cause amino acid changes in domain II, conserved among all members of this family. We isolated loss-of-function shy2 alleles including a putative null mutation. Gain-of-function and loss-of-function shy2 mutations affect auxin-dependent root growth, lateral root formation, and timing of gravitropism, indicating that SHY2/IAA3 regulates multiple auxin responses in roots. The phenotypes suggest that SHY2/IAA3 may activate some auxin responses and repress others. Models invoking tissue-specificity, feedback regulation, or control of auxin transport may explain these results.
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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
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
The Tomato Aux/IAA Transcription Factor IAA9 Is Involved in Fruit Development and Leaf Morphogenesis
Wang, H., Jones, B., Li, Z., Frasse, P., Delalande, C., Regad, F., Chaabouni, S., Latché, A., Pech, J.-C., & Bouzayen, M. (2005) · The Plant Cell · doi:10.1105/tpc.105.033415 · Cited by 601
Genetics of Aux/IAA and ARF action in plant growth and development
Liscum, E., & Reed, J. W. (2002) · Auxin Molecular Biology · doi:10.1007/978-94-010-0377-3_10 · Cited by 597
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Metadata
- Authors
- Tian, Q., & Reed, J. W.
- Venue
- Development
- Publisher
- The Company of Biologists
- Published
- 1999-02-15
- Volume
- 126
- Issue
- 4
- Pages
- 711-721
- ISSN
- 0950-1991 (ISSN-L)
- 1477-9129
- OpenAlex
- W2147882459
- Cited by
- 500
- References
- 0
- FWCI
- 43.73
- Type
- journal article
- Language
- en
- Open access
- green
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- Tian, Q., & Reed, J. W. (1999). Control of auxin-regulated root development by the Arabidopsis thaliana SHY2/IAA3 gene. Development. https://doi.org/10.1242/dev.126.4.711
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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