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Depolarization of Alfalfa Root Hair Membrane Potential by Rhizobium meliloti Nod Factors
Abstract
Although much is known about the bacterial genetics of early nodulation, little is known about the plant cell response. Alfalfa root hair cells were impaled with intracellular microelectrodes to measure a membrane potential depolarizing activity in Rhizobium meliloti cell-free filtrates, a plant response dependent on the bacterial nodulation genes. The depolarization was desensitized by repeated exposure to factors and was not observed in a representative nonlegume. A purified extracellular Nod factor, NodRm-IV(S), caused membrane potential depolarization at nanomolar concentrations. This rapid single-cell assay provides a tool for dissecting the mechanisms of host cell response in early nodulation.
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Cited by
Gage, D. J. (2004) · Microbiology and Molecular Biology Reviews · doi:10.1128/mmbr.68.2.280-300.2004 · Cited by 913
Mylona, P., Pawlowski, K., & Bisseling, T. (1995) · The Plant Cell · doi:10.1105/tpc.7.7.869 · Cited by 692
Mitra, R. M., Gleason, C. A., Edwards, A., Hadfield, J., Downie, J. A., Oldroyd, G. E. D., & Long, S. R. (2004) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.0400595101 · Cited by 494
Self-citationMarsh, J. F., Rakocevic, A., Mitra, R. M., Brocard, L., Sun, J., Eschstruth, A., Long, S. R., Schultze, M., Ratet, P., & Oldroyd, G. E. D. (2007) · Plant Physiology · doi:10.1104/pp.106.093021 · Cited by 462
Self-citationDénarié, J., & Cullimore, J. (1993) · Cell · doi:10.1016/0092-8674(93)90717-5 · Cited by 317
Metadata
- Authors
- Ehrhardt, D. W., Atkinson, E. M., & Long, S. R.
- Venue
- Science
- Published
- 1992-05-15
- Volume
- 256
- Issue
- 5059
- Pages
- 998-1000
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2082311540
- Cited by
- 442
- References
- 0
- FWCI
- 29.12
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ehrhardt, D. W., Atkinson, E. M., & Long, S. R. (1992). Depolarization of Alfalfa Root Hair Membrane Potential by Rhizobium meliloti Nod Factors. Science. https://doi.org/10.1126/science.10744524
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