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Root Plasma Membrane Transporters Controlling K+/Na+ Homeostasis in Salt-Stressed Barley
Open accessAbstract
Plant salinity tolerance is a polygenic trait with contributions from genetic, developmental, and physiological interactions, in addition to interactions between the plant and its environment. In this study, we show that in salt-tolerant genotypes of barley (Hordeum vulgare), multiple mechanisms are well combined to withstand saline conditions. These mechanisms include: (1) better control of membrane voltage so retaining a more negative membrane potential; (2) intrinsically higher H+ pump activity; (3) better ability of root cells to pump Na+ from the cytosol to the external medium; and (4) higher sensitivity to supplemental Ca2+. At the same time, no significant difference was found between contrasting cultivars in their unidirectional 22Na+ influx or in the density and voltage dependence of depolarization-activated outward-rectifying K+ channels. Overall, our results are consistent with the idea of the cytosolic K+-to-Na+ ratio being a key determinant of plant salinity tolerance, and suggest multiple pathways of controlling that important feature in salt-tolerant plants.
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Cited by
Wu, H., Tito, N., & Giraldo, J. P. (2017) · ACS Nano · doi:10.1021/acsnano.7b05723 · Cited by 533
Comparative physiology of elemental distributions in plants
Conn, S., & Gilliham, M. (2010) · Annals of Botany · doi:10.1093/aob/mcq027 · Cited by 344
Jayakannan, M., Bose, J., Babourina, O., Rengel, Z., & Shabala, S. (2013) · Journal of Experimental Botany · doi:10.1093/jxb/ert085 · Cited by 284
Self-citationMapping of HKT1;5 Gene in Barley Using GWAS Approach and Its Implication in Salt Tolerance Mechanism
Hazzouri, K. M., Khraiwesh, B., Amiri, K. M. A., Pauli, D., Blake, T., Shahid, M., Mullath, S. K., Nelson, D., Mansour, A. L., Salehi-Ashtiani, K., et al. (2018) · Frontiers in Plant Science · doi:10.3389/fpls.2018.00156 · Cited by 91
Metadata
- Authors
- Chen, Z., Pottosin, I. I., Cuin, T. A., Fuglsang, A. T., Tester, M., Jha, D., Zepeda-Jazo, I., Zhou, M., Palmgren, M. G., Newman, I. A., & Shabala, S.
- Venue
- Plant Physiology
- Publisher
- Oxford University Press (OUP)
- Published
- 2007-10-26
- Volume
- 145
- Issue
- 4
- Pages
- 1714-1725
- ISSN
- 0032-0889 (ISSN-L)
- 1532-2548
- OpenAlex
- W1992039827
- Cited by
- 486
- References
- 0
- FWCI
- 16.17
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Chen, Z., Pottosin, I. I., Cuin, T. A., Fuglsang, A. T., Tester, M., Jha, D., Zepeda-Jazo, I., Zhou, M., Palmgren, M. G., Newman, I. A., & Shabala, S. (2007). Root Plasma Membrane Transporters Controlling K+/Na+ Homeostasis in Salt-Stressed Barley. Plant Physiology. https://doi.org/10.1104/pp.107.110262
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