Rapid induction of na/h exchange activity in barley root tonoplast
- PMID: 16666496
- PMCID: PMC1055788
- DOI: 10.1104/pp.89.1.1
Rapid induction of na/h exchange activity in barley root tonoplast
Abstract
Na(+)/H(+) exchange activity in barley (Hordeum vulgare cv CM-72) root tonoplast was induced by Na(+) even in the presence of inhibitors of protein synthesis. Induction occurred with a half-time of only 15 minutes. When salt-treated roots were transferred to a nutrient solution containing no Na(+), the activity disappeared with a similar time course. The data suggest that Na(+)/H(+) exchange was due to activation of an existing protein rather than to de novo protein synthesis.
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