Selenocompounds-induced Bimodal Functions as Measured for Oxidoreductive Potentials in Brassica campestris cv. Chibu

• Published in: Journal of applied biological chemistry 2004, 47(4), , pp.167-172
• Main Authors: Han Chul Kang, Jung Bong Kim, Young Sang Kim, Seok Cheol Suh
• Format: Article
• Language: Korean
• Subjects: antioxidant; Brassica; growth; oxidoreductase; selenium; 농학
• ISSN: 1976-0442; 2234-7941

Bimodal effect of selenium which has been well known in animal was examined using cabbage grown with various seleniums. Higher concentration (500 μg/L) of selenium dioxide, selenium selenite, and selenium selenate inhibited the growth of cabbage, whereas organic seleniums, selenomethionine and selenocystine, did not considerably influenced the growth. DPPH radical scavenging activity gradually decreased at lower concentration (below 200 μg/L) of inorganic seleniums and the activities increased at higher contents of the seleniums. Catalase activity began to markedly increase from about 300 μg/L of the seleniums. Activities of glutathion peroxidase and glutathion reductase only increased at lower concentration of seleniums and thereafter decreased. Reduced-glutathion concentration was slightly increased in response to the seleniums. Superoxide dismutase activity decreased at lower concentration of seleniums and markedly increased at higher concentration. Collectively, the activities of oxidoreductive enzymes which are mainly involved in the antioxidant reaction were significantly changed in response to the applied seleniums. Higher absorption of inorganic seleniums appears to act as a stress factor but appropriate subjection in plant can be involved in the reduction of stress. KCI Citation Count: 0