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KMID : 1161520000040040337
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Animal Cells and Systems
2000 Volume.4 No. 4 p.337 ~ p.340
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Tolerance of several woody plants to sulphur dioxide
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Hwangbo Jun-Kwon
Lee Chang-Seok
Kim Joon-Ho
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Abstract
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The photosynthetic and stomatal responses of several woody plants (Powlonia coreana, Firmiana simplex, Quercus acutissima, Q. variabilis and Q. serrata) to SO2 were investigated in order to understand their eco physiological tolerance to SO2. Of the plants, P. coreana showed the largest reduction in its photosynthesis in response to exposure of 0.4 ppm SO2 for 20 h. Fumigation of 0.7 ppm SO2 for 20 h caused complete leaf necrosis of P. coreana and F. simplex, which made them unavailable for the measurement of photosynthesis. Q. variabilis exhibited the smallest reduction in photosynthesis following exposure of 0.7 ppm SO2 for 20 h. Both stomatal? and non?stomatal inhibition of the plants by SO2 were determined according to equations by Ikeda et al. (1992). When exposed to 0.4 ppm SO2 for 20 h, F. simplex and P. coreana showed the lowest stomatal and non?stomatal inhibition, respectively, while Q. variabilis and Q. serrata exhibited the lowest stomatal and non?stomatal inhibition, respectively, in response to 0.7 ppm SO2 for 20 h. The data are discussed with regard to resistance mechanisms of other plants to SO2 exposure and implications for restoration of declined Korean forests.
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KEYWORD
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Photosynthesis, Stomatal response, SO2 tolerance, Stomatal inhibition, Non-stomatal inhibition, Restoration
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