【摘要】 采用水培实验法研究了稀土La(Ⅲ)对紫外辐射(UV-B:0.15Wm-2,0.45Wm-2)胁迫下大豆(Glycinemax)幼苗体内O2-和H2O2积累、抗坏血酸过氧化物酶(AsA-POD)活性变化和叶绿素(chl)光氧化降解的影响。实验结果表明:La(Ⅲ)可降低大豆幼苗体内的O2-和H2O2含量、提高AsA-POD的活性,从而减轻光氧化作用对大豆幼苗chl的降解及对植株的伤害。更多还原

【Abstract】 The influence of Lanthanum (La) on light oxidation of soybean (Glycine max) seedling under elevated ultraviolet-B radiation (UV-B: 0.15Wm-2, 0.45Wm-2) was studied. The accumulation of O-2, H2O2, the changes of activity of AsA-POD and the effects of chlorophyll degradation caused by light oxidation. It was concluded that La could reduce the content of O-2 and H2O2 in the soybean seedling and increase the activity of AsA-POD. Therefore, La alleviated the chlorophyll degradation and the damage of soybean seedling caused by light oxidation.更多还原