• Korean Journal of Environmental Biology
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• v.26 no.4
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• pp.349-354
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• 2008

Superoxide dismutase (SOD) activities were investigated from the portions of shoots and roots in accordance with developmental stage and in response to environmental stress and antioxidants using Rhodiola-seedlings. The rates of SOD activities were revealed highly at the portion of roots and its tip of seedlings in the latter stages rather than the initial stages. SOD activities of seedlings in the initial stages treated with sodium chloride and cadmium as environmental stressors showed the decrease by 15 and 30% with respect to the control, respectively. However, in spite of stressor-treatments, the activities in the roots were increased according to the growth period showing a maximum rate of up to 45%. Also, SOD activities of the seedling treated with ascorbic acid as a antioxidant were increased by 46% of control value, but this was similar to the rate revealed in the presence of stressors. These results suggest that SOD activities in Rhodiola-seedlings may be related with the important defence-system against injurious environments.

• Korean Journal of Environmental Biology
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• v.22 no.1
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• pp.148-152
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• 2004

This study was carried out to investigate the callus formation and to determine the composition and contents of the Hee amino acids in seedlings and callus of Rhodiola sachalinensis. The callus formation from the part of seedling-roots was the most effective on MS (Murashige and Skoog) media supplemented with 2.0 mg $L^{-1}$2,, 4-D included in 1.0 mg $L^{-1}$ kinetin than the other experimental plots which prepared with the different concentration of the various growth regulators. Free amino acids extracted from the explants and the callus were a total of 25∼26 kinds. Especially, the basic amino acids such as arginine, lysine and histidine released in callus were found relatively in a large quantity. These results suggest that the cultured callus of Rhodiola sachatinensis could induce for the mass production of the other useful ingredients.