A comparison of UV-B induced stress responses in three barley cultivars
In order to investigate the role of potential genotype differences in three economically important barley cultivars, experiments were carried out to determine the influence of supplemental ultra-violet-B (UV-B, 280 320 nm) radiation on reactive oxygen species (ROS), antioxidant activity and photosyn...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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CSIRO Publishing
2006
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| Online Access: | http://hdl.handle.net/20.500.11937/12589 |
| _version_ | 1848748116048609280 |
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| author | Hideg, E. Rosenqvist, E. Varadi, G. Bornman, Janet Vincze, E. |
| author_facet | Hideg, E. Rosenqvist, E. Varadi, G. Bornman, Janet Vincze, E. |
| author_sort | Hideg, E. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In order to investigate the role of potential genotype differences in three economically important barley cultivars, experiments were carried out to determine the influence of supplemental ultra-violet-B (UV-B, 280 320 nm) radiation on reactive oxygen species (ROS), antioxidant activity and photosynthesis. Greenhouse-grown barley (hordeum vulgare L.) culitvars ‘Cork’, ‘Prestige” and ‘Golden Promise’ showed different responses to supplemental 280-320nm (UV-B) representing 100,138 and 2378% levels of ambient biologically active UV-B radiation, respectively. Among the three cultures studied, cv. Golden Promise was the most tolerant to UV-B, cv. Prestige was slightly more sensitive than cv. Cork. A comparison with the other two cultivars showed that under supplemental UV-B, Golden Promise leaves (i) retained a higher quantum yield of photosynthesis under photosynthetically active radiation (PAR, 400-700nm) corresponding to growth conditions; (ii) had the smallest decrease in both electron transport arte and non-photochemical quenching under high PAR; (iii) contained less oxidized ascorbate [measured as dehydroascorbate or electron paramagnetic resonance (EPR) detectable mondehydoascorbate radicals] than either Cork or Prestige. Under the highest UV-B level applied, Golden Promise leaves maintained the same activity of both mondehydroascorbate-reductase (MDAR) and ascorbate-preoxidase (APX) enzymes, as untreated controls, while MDAR markedly decreased in the other two cultivars and APX slightly increased in cv. Prestige. These features together with the observation of directly EPR-trappable free radicals and the light dependant accumulation of mondehydoascorbate radicals in Cork and Prestige but not in Golden Promise leaves under High UV-B suggest that Golden Promise plants suffered less oxidative stress than other cultivars. |
| first_indexed | 2025-11-14T06:59:55Z |
| format | Journal Article |
| id | curtin-20.500.11937-12589 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:59:55Z |
| publishDate | 2006 |
| publisher | CSIRO Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-125892017-02-28T01:33:49Z A comparison of UV-B induced stress responses in three barley cultivars Hideg, E. Rosenqvist, E. Varadi, G. Bornman, Janet Vincze, E. photosynthesis barley reactive oxygen species UV-B radiation oxidative stress In order to investigate the role of potential genotype differences in three economically important barley cultivars, experiments were carried out to determine the influence of supplemental ultra-violet-B (UV-B, 280 320 nm) radiation on reactive oxygen species (ROS), antioxidant activity and photosynthesis. Greenhouse-grown barley (hordeum vulgare L.) culitvars ‘Cork’, ‘Prestige” and ‘Golden Promise’ showed different responses to supplemental 280-320nm (UV-B) representing 100,138 and 2378% levels of ambient biologically active UV-B radiation, respectively. Among the three cultures studied, cv. Golden Promise was the most tolerant to UV-B, cv. Prestige was slightly more sensitive than cv. Cork. A comparison with the other two cultivars showed that under supplemental UV-B, Golden Promise leaves (i) retained a higher quantum yield of photosynthesis under photosynthetically active radiation (PAR, 400-700nm) corresponding to growth conditions; (ii) had the smallest decrease in both electron transport arte and non-photochemical quenching under high PAR; (iii) contained less oxidized ascorbate [measured as dehydroascorbate or electron paramagnetic resonance (EPR) detectable mondehydoascorbate radicals] than either Cork or Prestige. Under the highest UV-B level applied, Golden Promise leaves maintained the same activity of both mondehydroascorbate-reductase (MDAR) and ascorbate-preoxidase (APX) enzymes, as untreated controls, while MDAR markedly decreased in the other two cultivars and APX slightly increased in cv. Prestige. These features together with the observation of directly EPR-trappable free radicals and the light dependant accumulation of mondehydoascorbate radicals in Cork and Prestige but not in Golden Promise leaves under High UV-B suggest that Golden Promise plants suffered less oxidative stress than other cultivars. 2006 Journal Article http://hdl.handle.net/20.500.11937/12589 CSIRO Publishing restricted |
| spellingShingle | photosynthesis barley reactive oxygen species UV-B radiation oxidative stress Hideg, E. Rosenqvist, E. Varadi, G. Bornman, Janet Vincze, E. A comparison of UV-B induced stress responses in three barley cultivars |
| title | A comparison of UV-B induced stress responses in three barley cultivars |
| title_full | A comparison of UV-B induced stress responses in three barley cultivars |
| title_fullStr | A comparison of UV-B induced stress responses in three barley cultivars |
| title_full_unstemmed | A comparison of UV-B induced stress responses in three barley cultivars |
| title_short | A comparison of UV-B induced stress responses in three barley cultivars |
| title_sort | comparison of uv-b induced stress responses in three barley cultivars |
| topic | photosynthesis barley reactive oxygen species UV-B radiation oxidative stress |
| url | http://hdl.handle.net/20.500.11937/12589 |