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이미순(Mie Soon Lee),박소원(So Won Park),이서래(Su Sae Lee) 한국식물학회 1975 Journal of Plant Biology Vol.18 No.1
Development of a model system for mode of action studies of SO_2 was attempted with a plant tissue. Leaf disks, 1.0㎝ diameter, cut from the lamina of lettuce leaves, were floated on the testing medium and placed in light or dark condition to investigate the discoloration pattern with various sources of SO_2. Discoloration of leaf disks tended to be more serious with higher concentrations of SO_2 and on exposure to the light. Leaf disks were more severely discolored at lower pH with constant SO_2 concentration. These discoloration patterns were highly reproducible and similar in all sources of SO_2. Spectrophotometric evidence suggested that light-mediated discoloration of leaf disks in the presence of SO_2 might occur mainly through chlorophyll α degradation.