Abstract
In this study, we examined the influence of UV-B radiation (280–320 nm) on ABA accumulation in 14-day-old Arabidopsis thaliana (L.) Heynh plants of wild type (WT), ethylene receptor mutant (etr1-1), and mutant with a constitutively active ethylene signal transduction pathway (ctr1-1). ABA content in nonirradiated WT plants was twice higher than in each mutant. UV-B irradiation caused dose-dependent ABA accumulation in WT plants. In the etr1-1 mutant, the amount of accumulated ABA was significantly less. In the ctr1-1 mutant, ABA content didn’t increase after UV-B irradiation. These data suggest that start of stress-induced ABA formation requires the adjustable ethylene signal pathway. In the ctr1-1 mutant, a constitutively active (nonadjustable) ethylene signal pathway blocks stress-induced ABA accumulation.
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Abbreviations
- ESP:
-
ethylene signal pathway
- WT:
-
wild type
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Original Russian Text © V.Yu. Rakitin, V.V. Karyagin, T.Ya. Rakitina, O.N. Prudnikova, P.V. Vlasov, 2008, published in Fiziologiya Rastenii, 2008, Vol. 55, No. 6, pp. 942–944.
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Rakitin, V.Y., Karyagin, V.V., Rakitina, T.Y. et al. UV-B stress-induced ABA production in Arabidopsis thaliana mutants defective in ethylene signal transduction pathway. Russ J Plant Physiol 55, 854–856 (2008). https://doi.org/10.1134/S1021443708060174
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DOI: https://doi.org/10.1134/S1021443708060174