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KMID : 0352719890130010092
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Journal of Ginseng Research
1989 Volume.13 No. 1 p.92 ~ p.97
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Study on the Enzyme Activity in Leaf-Burning Disease of Panax ginseng C.A. Meyer
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양덕조
김명원/최정도/이성종
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Abstract
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This study investigated the effects of high light intensity (100 KLw) and high temperature (45 ℃, dark) on enzyme (glucose-6-phosphate dehydrogenase, acid phosphatase, catalase, peroxidase, and proteinase) activities and characteristics of Panax ginseng C.A. Meyer leaves. Enzyme activity and protein content decreased rapidly under treatment with high light intensity In P ginseng the thermal stabilities of catalase and peroxidase were high (above 70%), and the coagulation rates of soluble proteins were low (below 17%). Therefore, the decrease in enzyme activity and protein content was not caused by increase in leaf temperature due to the high light intensity, but by increase in proteolytic activities. The photochemical formation rate of superoxide radical (O-2) was higher in the P ginseng leaf extracts than in Solanum nigmm, and was accelerated by addition of crude saponin to the buffer extracts.
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KEYWORD
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Panax ginseng C.A Meyer, leaf burning disease, thermal stability of enzyme, superoxide
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