Morphological and anatomical changes of Norway spruce needles (Picea abies (L.)Karst.) in the Šoštanj steam power plant influence areaKmecl, Alenka (Avtor) Batič, Franc (Avtor) Norway spruceneedlesinjuriesautofluorescence of chlorophyllDCMUsecondary fluorescence of chlorophyllMorphological and anatomical changes of Norway spruce needles from 16 sampling plots in the vicinity of the Steam Power Plant in Šoštanj (TEŠ) were examined. The visible needle injuries were analysed and compared to the sulphur contents in the same samples. On the basis of this comparison and analysis of needle infections by microorganisms a conclusion was made on the possible causes of needle injuries. A new method of evaluation of needle injuries was tested. The method was based on autofluorescence of chlorophyll in spruce needles. After DCMU treatment of needle samples, the fluorescence intensity rose significantly, yet not proportionally to the autofluorescence intensity. The difference between the autofluorescence and the secondary fluorescence intensity (after DCMU treatment) showed, to which degree was damaged the photosynthetic apparatus of the Norway spruce-needles. 19922015-07-10 21:35:07Neznano69741UDK: 582.47:581.4ISSN pri članku: 0351-3114COBISS_ID: 36059136sl