caa a22 4500 469098244 CHVBK 20180323133037.0 cr unu---uuuuu 170328e19920401xx s 000 0 eng 10.1007/BF00317810 doi (NATIONALLICENCE)springer-10.1007/BF00317810 Mineral nutrient deficiency increases the sensitivity of photosynthesis to sulphur dioxide in needles of a coniferous tree, Abies nordmanniana [Elektronische Daten] [Iris Jung, Klaus Winter] Summary: Abies nordmanniana (Stev.) Spach was cultivated in rooting media either rich in nutrients (control) or low in magnesium (low Mg) or low in magnesium and nitrogen (low Mg-N), respectively. Intact, attached needles were exposed, in the light (460 μmol photons m-2 s-1), to an atmosphere containing 1 ppm SO2 for 5 h. Measurements of light- and CO2-saturated rates of photosynthetic O2 evolution, A max, were performed before and after SO2 treatments. In needles from well fertilized plants, A max was high (about 50 μmol m-2 s-1) and was not affected by SO2. Needles from low-Mg and low-Mg-N plants had lower photosynthetic rates and showed a marked decline in A max in response to the SO2 treatment. Stomatal conductance was similar in the three groups of plants during SO2 treatments. Springer-Verlag, 1992 Abies nationallicence Mineral deficiency nationallicence Photosynthesis nationallicence Sulphur dioxide nationallicence A max : photosynthetic capacity (CO2- and light-saturated rate of O2 evolution) nationallicence DW : dry weight nationallicence Fo : yield of dark level fluorescence nationallicence FM : maximum yield of fluorescence, induced in a pulse of saturating light nationallicence Fv : yield of variable fluorescence (= FM−FO) nationallicence FW : fresh weight nationallicence g, conductance to water vapor transfer nationallicence Jung Iris Lehrstuhl für Botanik II der Universität, Mittlerer Dallenbergweg 64, W-8700, Würzburg, Federal Republic of Germany aut Winter Klaus Lehrstuhl für Botanik II der Universität, Mittlerer Dallenbergweg 64, W-8700, Würzburg, Federal Republic of Germany aut Oecologia Springer-Verlag 90/1(1992-04-01), 70-73 0029-8549 90:1<70 1992 90 442 https://doi.org/10.1007/BF00317810 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317810 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jung Iris Lehrstuhl für Botanik II der Universität, Mittlerer Dallenbergweg 64, W-8700, Würzburg, Federal Republic of Germany aut NATIONALLICENCE 700 1- Winter Klaus Lehrstuhl für Botanik II der Universität, Mittlerer Dallenbergweg 64, W-8700, Würzburg, Federal Republic of Germany aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 90/1(1992-04-01), 70-73 0029-8549 90:1<70 1992 90 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer