Abstract
Two selected lines of bread wheat, Triticum aestivum L., differing in their relative salt resistance, were grown in isosmotic solutions of different ionic compositions to investigate sensitivity to specific ions. Growth rates and ion accumulation were determined. The salt composition of the various solutions had little effect on the growth of the salt-resistant line, but significantly affected that of the salt-sensitive line. Specifically, solutions containing high Na+ concentrations were more toxic than those containing high Cl− concentrations or high concentrations of nutrient ions. There were few differences in ion accumulation between lines in a given treatment, although the sensitive line tended to accumulate more Na+ than the tolerant line in the salt treatments with high Na+ concentrations. The overall results provide evidence that there is a definite specific ion effect which is related to salt sensitivity in wheat. It is suggested that superior compartmentation of toxic ions, principally Na+, may be a mechanism of salt resistance in this case.
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Selected References
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- Epstein E., Norlyn J. D., Rush D. W., Kingsbury R. W., Kelley D. B., Cunningham G. A., Wrona A. F. Saline culture of crops: a genetic approach. Science. 1980 Oct 24;210(4468):399–404. doi: 10.1126/science.210.4468.399. [DOI] [PubMed] [Google Scholar]
- Epstein E. The essential role of calcium in selective cation transport by plant cells. Plant Physiol. 1961 Jul;36(4):437–444. doi: 10.1104/pp.36.4.437. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kingsbury R. W., Epstein E., Pearcy R. W. Physiological responses to salinity in selected lines of wheat. Plant Physiol. 1984 Feb;74(2):417–423. doi: 10.1104/pp.74.2.417. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lahaye P. A., Epstein E. Salt toleration by plants: enhancement with calcium. Science. 1969 Oct 17;166(3903):395–396. doi: 10.1126/science.166.3903.395. [DOI] [PubMed] [Google Scholar]
- Rush D. W., Epstein E. Comparative studies on the sodium, potassium, and chloride relations of a wild halophytic and a domestic salt-sensitive tomato species. Plant Physiol. 1981 Dec;68(6):1308–1313. doi: 10.1104/pp.68.6.1308. [DOI] [PMC free article] [PubMed] [Google Scholar]