A comparison of UV-B induced stress responses in three barley cultivars

Functional Plant Biology : FPB
Éva HidegÉva Vincze

Abstract

In order to investigate the role of potential genotypic differences in three economically important barley cultivars, experiments were carried out to determine the influence of supplemental ultraviolet-B (UV-B, 280-320 nm) radiation on reactive oxygen species (ROS), antioxidant activity and photosynthesis. Greenhouse-grown barley (Hordeum vulgare L.) cultivars 'Cork', 'Prestige' and 'Golden Promise' showed different responses to supplemental 280-320 nm (UV-B) representing 100, 138 and 238% levels of ambient biologically active UV-B radiation, respectively. Among the three cultivars 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, 400-700 nm) corresponding to growth conditions; (ii) had the smallest decrease in both electron transport rate and non-photochemical quenching under high PAR; (iii) contained less oxidized ascorbate [measured as dehydroascorbate or electron paramagnetic resonance (EPR) detectable monodehydroascorbate radicals] than either Cork or Prestige...Continue Reading

References

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Citations

Dec 1, 2007·Functional Plant Biology : FPB·Po-Yu ChenHao-Jen Huang
Sep 19, 2007·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Christopher T RuhlandMatthew A Krna
Mar 9, 2007·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·M M CaldwellG Kulandaivelu

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Methods Mentioned

BETA
MDAsA
electron spin resonance

Software Mentioned

SigmaPlot

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