硒引发对紫花苜蓿种子抗氧化性能的影响

为探索外源硒引发对紫花苜蓿(Medicago sativa)种子抗氧化性能的影响,本试验用不同浓度(0,0.5,1.0,2.0,4.0和8.0 mmol·L-1)的亚硒酸钠溶液引发0,3,6,9和12 h后,分析其发芽率、丙二醛(malondialdehyde,MDA)含量、超氧化物歧化酶(superoxide dis...

Effect of Selenium Priming on The Antioxidation of Alfalfa Seeds

Alfalfa seeds were primed with different concentrations(0,0.5,1.0,2.0,4.0 and 8.0 mmol·L^-1)of sodium selenite solutions for 0,3,6,9 and 12 h,to explore the effect of exogenous selenium priming on antioxidant capacity of the seeds.And then we analyzed the changes in germination percentage,malondialdehyde(MDA)contents,superoxide dismutase(SOD),peroxidase(POD),catalase(CAT)and aseorbate peroxidase(APX)activities.The results showed that germination percentage and antioxidant capacity of alfalfa seeds were closely related to the selenium concentration and its priming time.Germination percentage of alfalfa seeds was improved by priming with low concentration(0.5~1.0 mmol·L^-1)of sodium selenite,and their SOD,POD,CAT and APX activities were also increased,but their MDA content was decreased.However,the opposite results were found by priming with high concentration of sodium selenite.The best treatment was 0.5 mmol·L^-1 of sodium selenite solutions for 12 h in the production of selenium-rich alfalfa by seed priming.