Thiol content of spruce needles at forest limits |
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Authors: | D Grill H Pfeifhofer A Tschulik K Hellig K Holzer |
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Institution: | (1) Institut für Pflanzenphysiologie der Karl-Franzens-Universität Graz, Schubertstrasse 51, A-8010 Graz, Austria;(2) Forstiche Bundesversuchsanstalt, Institut für Forstpflanzenzüchtung und Genetik, A-1140 Wien-Mariabrunn, Austria |
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Abstract: | Summary We determined the water-soluble thiol (SH) content and the osmolality of the cell sap in spruce trees of both low- and high-altitude origin that were transplanted to two test areas at different altitudes (400 m and 1700 m). There was little or no significant difference in SH content and osmotic value between trees of low- or high-altitude origin at the same altitude, but the sulfhydryl (SH) content varied with the altitude of cultivation, being higher at 1700 m than at 400 m. SH content and osmotic value were higher in winter, independent of altitude and provenance. The annual pattern of water-soluble and protein-bound SH content and glutathione reductase activity was measured in spruce trees at 1700 m; these values also peaked in winter and were lowest in summer. |
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Keywords: | Thiols Glutathione reductase Osmotic value Annual rhythm Picea abies |
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