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UV-B辐射增强对植物的影响效果存在差异,即使是同一物种的不同品种之间也存在差异。本研究以对UV-B不同耐性的2个冬小麦品种“科遗26”和“泰山269”为材料,比较了品种间及UV-B的剂量间的形态指标、生物量及生理指标的差异。结果表明:高剂量UV-B处理抑制了株高、叶色、茎数、鲜质量、光反应系统Ⅱ(PSⅡ)最大光化学效率(Fv/Fm)和光合速率,促进了丙二醛、类黄酮含量的增加及相对电导率的提高,2个品种的趋势基本相同,但泰山269的变化幅度大于科遗26,说明泰山269比科遗26敏感;低剂量的UV-B对株高、叶色、茎数、鲜质量表现出促进的趋势,对类黄酮的促进作用较大,对Fv/Fm、丙二醛及相对电导率的影响相对较小。
There are differences in the effects of UV-B radiation on plants, even among different species of the same species. In this study, two winter wheat cultivars, “Keji 26” and “Taishan 269”, which had different tolerance to UV-B were used as materials to compare the morphological indexes, biomass and physiology Differences in indicators. The results showed that the high dose UV-B treatment inhibited the plant height, leaf color, stem number, fresh weight, maximum photochemical efficiency (Fv / Fm) and photosynthetic rate of PSⅡ, Content increased and the relative conductivity increased, the trend of the two cultivars was basically the same, but the variation range of Taishan 269 was greater than that of Keji 26, indicating that Taishan 269 was more sensitive than Kekeji 26; Low-dose UV-B had no significant effect on plant height, leaf color , Stem number, fresh weight showed a tendency of promotion, but the effect on flavonoids was greater, and the effect on flavonoids, Fv / Fm, MDA and relative conductivity were relatively less.