Abstract
The seeds of winter wheat were pretreated with three different doses of low-energy N+ beams, and its seedlings were subjected to UV-B irradiation (10.08 kJ m−2 day−1) at three-leaves stage. The growth characteristic of seeds, the oxidative damage to membrane system induced by UV-B radiation, and the alleviating effects of N+ beams pretreatment to radiation damage were investigated. The results showed that the germination rate and seedling rate, respectively, increased 14.09 ± 1.03 and 13.91 ± 1.21 % compared with control (CK) at the dose of 4.0 × 1016 ions/cm2. When seedlings were exposed to UV-B radiation, the pretreatment method under the dose of 4.0 × 1016 ions/cm2 made the activity of peroxidase and superoxide dismutase increasing, the content of chlorophyll enhancing, but the content of malondialdehyde reducing significantly compared with that of the single UV-B radiation. Whereas, the activity of catalase irradiated by UV-B improved notably under the pretreatment dose of 8.0 × 1016 ions/cm2. In addition, after being irradiated with UV-B, the content of soluble protein and glutathione whose seeds were pretreated by the dose of 6.0 × 1016 ions/cm2 were higher than that of the single UV-B radiation. It was suggested that the suitable dose of low-energy ion beams pretreatment to wheat seeds could change its physiological characteristics at seedlings stage to alleviate the damage effects from UV-B radiation.
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This work was financially supported by the National Natural Science Foundation of China (no. 10505018) and the Natural Science Foundation of Henan Province of P. R. of China (no. 091100110401).
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Zhao, S., Huang, Q., Yang, P. et al. Effects of Ion Beams Pretreatment on Damage of UV-B Radiation on Seedlings of Winter Wheat (Triticum aestivum L.). Appl Biochem Biotechnol 168, 2123–2135 (2012). https://doi.org/10.1007/s12010-012-9922-2
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DOI: https://doi.org/10.1007/s12010-012-9922-2