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Control of Arabidopsis meristem development by thioredoxin-dependent regulation of intercellular transport
Open accessAbstract
Cell-to-cell transport in plants occurs through cytoplasmic channels called “plasmodesmata” and is regulated by developmental and environmental factors. Callose deposition modulates plasmodesmal transport in vivo, but little is known about the mechanisms that regulate this process. Here we report a genetic approach to identify mutants affecting plasmodesmal transport. We isolated 5 mutants, named gfp arrested trafficking ( gat ), affected in GFP unloading from the phloem into the meristem. gat1 mutants were seedling lethal and carried lesions in an m -type thioredoxin that is expressed in non-green plastids of meristems and organ primordia. Callose and hydrogen peroxide accumulated in gat1 mutants, and WT plants subjected to oxidative conditions phenocopied the gat1 trafficking defects. Ectopic expression of GAT1 in mature leaves increased plasmodesmal permeability and led to a delay in senescence and flowering time. We propose a role for the GAT1 thioredoxin in the redox regulation of callose deposition and symplastic permeability that is essential for meristem maintenance in Arabidopsis .
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Citations
Cited by
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Meyer, Y., Belin, C., Delorme-Hinoux, V., Reichheld, J.-P., & Riondet, C. (2012) · Antioxidants & Redox Signaling · doi:10.1089/ars.2011.4327 · Cited by 406
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Geigenberger, P. (2011) · Plant Physiology · doi:10.1104/pp.110.170399 · Cited by 348
Iron-Dependent Callose Deposition Adjusts Root Meristem Maintenance to Phosphate Availability
Müller, J., Toev, T., Heisters, M., Teller, J., Moore, K. L., Hause, G., Dinesh, D. C., Bürstenbinder, K., & Abel, S. (2015) · Developmental Cell · doi:10.1016/j.devcel.2015.02.007 · Cited by 344
Cilia, M., Peter, K. A., Bereman, M. S., Howe, K., Fish, T., Smith, D., Gildow, F., MacCoss, M. J., Thannhauser, T. W., & Gray, S. M. (2012) · PLoS ONE · doi:10.1371/journal.pone.0048177 · Cited by 35
Metadata
- Authors
- Benitez-Alfonso, Y., Cilia, M., Roman, A. S., Thomas, C., Maule, A., Hearn, S., & Jackson, D.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2009-03-03
- Volume
- 106
- Issue
- 9
- Pages
- 3615-3620
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W1998092744
- Cited by
- 251
- References
- 0
- FWCI
- 25.31
- Type
- journal article
- Language
- en
- Open access
- green
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- Benitez-Alfonso, Y., Cilia, M., Roman, A. S., Thomas, C., Maule, A., Hearn, S., & Jackson, D. (2009). Control of Arabidopsis meristem development by thioredoxin-dependent regulation of intercellular transport. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0808717106
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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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