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SOS1 gene overexpression increased salt tolerance in transgenic tobacco by maintaining a higher K+/Na+ ratio
- Source :
-
Journal of Plant Physiology . Feb2012, Vol. 169 Issue 3, p255-261. 7p. - Publication Year :
- 2012
-
Abstract
- Abstract: Crop productivity is greatly affected by soil salinity, so improvement in salinity tolerance of crops is a major objective of many studies. We overexpressed the Arabidopsis thaliana SOS1 gene, which encodes a plasma membrane Na+/H+ antiporter, in tobacco (Nicotiana tabacum cv. Xanthi-nc). Compared with nontransgenic plants, seeds from transgenic tobacco had better germination under 120mM (mmolL−1) NaCl stress; chlorophyll loss in the transgenic seedlings treated with 360mM NaCl was less; transgenic tobacco showed superior growth after irrigation with NaCl solutions; and transgenic seedlings with 150mM NaCl stress accumulated less Na+ and more K+. In addition, roots of SOS1-overexpressing seedlings lost less K+ instantaneously in response to 50mM NaCl than control plants. These results showed that the A. thaliana SOS1 gene potentially can improve the salt tolerance of other plant species. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01761617
- Volume :
- 169
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Plant Physiology
- Publication Type :
- Academic Journal
- Accession number :
- 70386003
- Full Text :
- https://doi.org/10.1016/j.jplph.2011.10.007