Abstract
The effect of a moderate increase in atmospheric sulphur dioxide on the production of phenolic secondary chemicals, soluble sugars and phytomass distribution within plants was investigated in six willow (Salix myrsinifolia Salisb.) clones. The plants were cultivated for 3 weeks under 0.11 ppm of SO2 (300 μg m−3). The production of salicin and chlorogenic acid was significantly reduced under increased SO2. However, salicortin, 2′-O-acetylsalicortin, (+)-catechin and two unknown phenolics did not show any clear trend. The increase in SO2 did not affect the glucose, fructose and sucrose contents. The final weight of the SO2-treatment plants was significantly greater than that of the control plants: the leaf, stem and root phytomass was from 14 to 48% greater under increased SO2. All the clones showed the same trend, although there was a significant variation in phytomass production. Our results indicate, although not consistently that even a short-term exposure of enhanced atmospheric SO2 may change moderately the accumulation pattern of willow phenolics.
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Julkunen-Tiitto, R., Lavola, A. & Kainulainen, P. Does SO2 fumigation change the chemical defense of woody plants: The effect of short-term SO2 fumigation on the metabolism of deciduous Salix myrsinifolia plants. Water Air Soil Pollut 83, 195–203 (1995). https://doi.org/10.1007/BF00477352
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DOI: https://doi.org/10.1007/BF00477352