硒对猕猴桃抗氧化活性的促进作用

在大田条件下,给中华猕猴桃施以浓度分别为0.15、0.3、0.5 mg/kg的Na2SeO3溶液,在盛花期后测定猕猴桃叶各项生理指标,研究硒对猕猴桃生理生化的影响。结果显示：施硒提高了猕猴桃叶总叶绿素含量,谷胱甘肽过氧化物酶（GPx）、超氧化物歧化酶（SOD）以及过氧化物酶（POD）活性。然而高浓度的硒（≥0.5mg/kg）则降低了叶绿素含量,抑制了叶绿素超氧化物歧化酶（SOD）以及过氧化物酶（POD）活性。实验表明适宜浓度范围的硒可以提高猕猴桃的抗氧化能力。

Response of Physiology ofActinidia chinensis Planch to Selenium

The effects of selenium on physiological and biochemical characteristics in Actinidia chinensis Planch leaves were studied. The plants were cultivated with different selenium （Se） concentrations （0.15, 0.3, 0.5 mg/kg Na2SeO3）. When the flower buds appeared, the leaves were harvested for measurement of chlorophyll content and activities of four antioxidant enzymes. The results showed that selenium added to Actinidia chinensis Planch leaves increased chlorophyll content, the activity of glutathione peroxidase （GPx）, superoxide dismutase （SOD） and peroxidase （POD）, while decreased the activities of superoxide dismutase （SOD） and peroxidase （POD） when Selenium was over 0.5 mg/kg. Therefore, treatments with suitable concentration of selenium could enhance the antioxidant abilities of Actinidia chinensis Planch leaves.