硒对西葫芦幼苗根系生长及保护酶活性的影响

Effect of Selenium on Growth and Protective Enzyme Activity of Seedling Roots of Cucurbita pepo L.

为进一步提高西葫芦产量和品质,以翠玉特早王西葫芦种子为材料,采用水培法,研究不同硒浓度对西葫芦幼苗根系生长及保护酶活性的影响。结果表明：适量的硒可促进西葫芦幼苗根系生长,提高幼苗根系保护酶活性。硒浓度为0.4mg·L^-1时,西葫芦幼苗根系总长度、总面积、总体积、根尖数及平均直径最大,CAT活性最高,MDA含量最低,0.2 mg·L^-1处理SOD活性最高。西葫芦幼苗根系生长的最佳Na2SeO3浓度为0.2~0.4mg·L^-1。

In order to further improve the yield and quality of Cucurbita pepo L.,taking Cuiyutezaowang seeds as test materials,the effects of different selenium concentrations on growth and protective enzyme activity of seedling roots of Cucurbita pepo L.were studied with water culture method.The results showed that suitable concentration of selenium could promote growth of seedling roots and improve protective enzyme activity.When concentration of selenium was 0.4mg·L%-1,the length,area,volume,number,diameter,CAT activity and MDA content of seedling roots reached max,SOD activity reached max with the concentration of 0.2mg·L^-1.The optimal concentration of Na2SeO3 for roots growth of Cucurbita pepo L.was 0.2~0.4mg·L^-1.