The Effects of UV-B Radiation on Maize at the Seedling Stage

UV-B辐射增强对玉米苗期的影响（英文）

In this study, maize plant seedlings were grown in soilless cultures, with and without ^-B radiation at a close of 5.4 kJt（m2-d）. Three clays later, it was found that the treatment of UV-B radiation significantly reduced such characteristics as biomass, plant height, leaf area, and so on. Also, the photosynthesis of the maize was inhabited, the anti-oxid activity decreased, and the MDA concentration increased with the UV-B radiation exposure. The maize presented visible hybrid vigor under the control condition, while the hybrid vigor under UV-B radiation barely emerged in biomass, plant height, leaf area, and physiological metabolic index.

为探讨UV-B辐射增强对玉米苗的影响,该研究在温室内对水培玉米品种农大108苗期施加5.4 KJ/(m^2·d)的UV-B辐射处理。结果表明玉米的生物量、株高等形态指标部下降,玉米叶片的光合速率、气孔导度、蒸腾速率下降和胞间二氧化碳浓度上升,玉米叶片的抗氧化酶活性下降:在对照条件下,玉米杂交种表现出来了明显的杂种优势,但是在UVB辐射胁迫下,杂交种在生物量、株高、叶面积、光合作用以及生理代谢方面对UV-B辐射抗性没有表现出明显的杂种优势。