Effects of Exogenous Cobalt on Seed Germination and Antioxidant Ability of Radish Under NaCl Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Effects of Exogenous Cobalt on Seed Germination and Antioxidant Ability of Radish Under NaCl Stress

Author(s):: ZHAO Hong; CHENG Yurou; (School of Life Science，Shangrao Normal University，Shangrao，Jiangxi 334001)

Keywords:: radish; NaCl stress; cobalt; seed germination; antioxidant ability

Abstract:: In order to provide theoretical basis for radish cultivation in saline-alkali soil，the hydroponics experiment of radish (Raphanus sativus L.) was used to study the effects of different concentrations of Co（0.01,0.05,0.10,0.50,1.00 mmol?L-1） in the form of CoCl2?6H2O on seed germination and antioxidant ability under 80 mmol?L-1NaCl stress.The results showed that，germination rate，germination potential，germination index and vigor index of radish seeds treated with exogenous cobalt were significantly higher than those of untreated seeds.The content of MDA，the activities of SOD and CAT of radish seedlings were significantly increased in 80 mmol?L-1 NaCl solution.The adding 0.01-0.10 mmol?L-1 exogenous cobalt could improve the activities of SOD，POD and CAT，decreased the content of MDA.But the adding 0.50-1.00 mmol?L-1 exogenous cobalt reduced the activities of SOD and CAT，increased the content of MDA.In conclusion，the exogenous cobalt with a suitable concentration(0.01-0.10 mmol?L-1) could decrease inhibition on radish seed germination under NaCl stress，improve the activity of antioxidant enzyme，reduce the contents of MDA.Among them，the optimum concentration was 0.1 mmol?L-1 exogenous cobalt.But instead，the higher concentration of exogenous cobalt(0.50-1.00 mmol?L-1) would result pernicious effect on radish seedlings

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Last Update: 2018-05-22