用功率密度为2.8 mW/mm2, 3.8 mW/mm2及5.4 mW/mm2的He-Ne激光辐射干种子,辐射时间均分别为5 s, 50 s和500 s。发现经激光辐射干种子的玉米幼苗中,过氧化物酶(POD)和过氧化氢酶(CAT)活性均增高,抗坏血酸过氧化物酶(AsAPOD)活性下降,谷光甘肽(GSH)含量增加。其综合效果是增强了植物体清除活性氧的能力。

This paper presents experimental studies in which the drying corn seeds are irradiatedby He-Ne laser at power densities of 2.8 mW/mm2,3.8 mW/mm2 and 5.4 mW/mm2, respectively, and the corresponding irradiating times last 5 s, 50 s and 500 s. As a result, the POD and CAT activities of corn seedling are enhenced while their AsAPOD activity is reduced and their GSH contents are increased. Consequently, the improvement of the active oxygen metabolism for plants the seeds of which have been irradiated can be expected.