Relationships between respiratory activity and water-soluble sulfhydryl content of Norway spruce needles |
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Authors: | Pfeifhofer C Pfeifhofer H Grill D Esterbauer H |
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Institution: | Institut für Pflanzenphysiologie, Universit?t Graz, Schubertstrasse 51, 8010 Graz, Austria. |
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Abstract: | The rate of respiration of spruce needles was affected by the level of foliar glutathione. At 37 degrees C the rate of respiration increased with increasing water-soluble sulfhydryl content up to 1.3 micromol g(-1) fresh weight. Higher thiol concentrations inhibited the rate of respiration. At 25 degrees C no relationship was observed between glutathione content and rate of respiration. It was concluded that the mechanism by which SO(2) affects plants is temperature dependent. |
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