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KMID : 0368419750180010001
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Journal of Plant Biology
1975 Volume.18 No. 1 p.1 ~ p.10
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Discoloration Pattern of Lettuce Leaf Disks as Influenced by Sulfur Dioxide
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Lee, Mie Soon/이미순
Park, So Won/Lee, Su Sae/박소원/이서래
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Abstract
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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.
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