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DEX1, a Novel Plant Protein, Is Required for Exine Pattern Formation during Pollen Development in Arabidopsis
Open accessAbstract
To identify factors that are required for proper pollen wall formation, we have characterized the T-DNA-tagged, dex1mutation of Arabidopsis, which results in defective pollen wall pattern formation. This study reports the isolation and molecular characterization of DEX1 and morphological and ultrastructural analyses of dex1 plants.DEX1 encodes a novel plant protein that is predicted to be membrane associated and contains several potential calcium-binding domains. Pollen wall development in dex1 plants parallels that of wild-type plants until the early tetrad stage. Index1 plants, primexine deposition is delayed and significantly reduced. The normal rippling of the plasma membrane and production of spacers observed in wild-type plants is also absent in the mutant. Sporopollenin is produced and randomly deposited on the plasma membrane in dex1 plants. However, it does not appear to be anchored to the microspore and forms large aggregates on the developing microspore and the locule walls. Based on the structure of DEX1 and the phenotype of dex1 plants, several potential roles for the protein are proposed.
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Cited by
Scott, R. J. (2004) · THE PLANT CELL ONLINE · doi:10.1105/tpc.017012 · Cited by 675
Genetic and Biochemical Mechanisms of Pollen Wall Development
Shi, J., Cui, M., Yang, L., Kim, Y.-J., & Zhang, D. (2015) · Trends in Plant Science · doi:10.1016/j.tplants.2015.07.010 · Cited by 422
Pollen wall development in flowering plants
Blackmore, S., Wortley, A. H., Skvarla, J. J., & Rowley, J. R. (2007) · New Phytologist · doi:10.1111/j.1469-8137.2007.02060.x · Cited by 419
Morant, M., Jørgensen, K., Schaller, H., Pinot, F., Møller, B. L., Werck-Reichhart, D., & Bak, S. (2007) · The Plant Cell · doi:10.1105/tpc.106.045948 · Cited by 396
Guan, Y.-F., Huang, X.-Y., Zhu, J., Gao, J.-F., Zhang, H.-X., & Yang, Z.-N. (2008) · Plant Physiology · doi:10.1104/pp.108.118026 · Cited by 294
Metadata
- Authors
- Paxson-Sowders, D. M., Dodrill, C. H., Owen, H. A., & Makaroff, C. A.
- Venue
- Plant Physiology
- Publisher
- Oxford University Press (OUP)
- Published
- 2001-12-01
- Volume
- 127
- Issue
- 4
- Pages
- 1739-1749
- ISSN
- 0032-0889 (ISSN-L)
- 1532-2548
- OpenAlex
- W2097378319
- Cited by
- 207
- References
- 0
- FWCI
- 1.19
- Type
- journal article
- Language
- en
- Open access
- green
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- Paxson-Sowders, D. M., Dodrill, C. H., Owen, H. A., & Makaroff, C. A. (2001). DEX1, a Novel Plant Protein, Is Required for Exine Pattern Formation during Pollen Development in Arabidopsis. Plant Physiology. https://doi.org/10.1104/pp.010517
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