The changes in the internal structure of Pseudotsuga menziesii (Mirb.) Franco needles under the influence of air-pollution
2008
Veselinović, M., Institute of Forestry, Belgrade (Serbia) | Dražić, D., Institute of Forestry, Belgrade (Serbia) | Ratknić, M., Institute of Forestry, Belgrade (Serbia) | Rakonjac, Lj., Institute of Forestry, Belgrade (Serbia) | Golubović-Ćurguz, V., Institute of Forestry, Belgrade (Serbia) | Čule, N., Institute of Forestry, Belgrade (Serbia) | Mitrović, S., Institute of Forestry, Belgrade (Serbia)
The deposits of Kolubara open-pit mining fields are under the direct influence of the largest power plants of this type in our country. This area is under the influence of air pollution due to the lignite mine exploitation, combustion and transport. The scope of our research has been aimed at the Pseudotsuga menziesii (Mirb.) Franco resistance to air-pollution; taking into consideration the fact that the foliage represents the primary zone under the negative effect of air-pollutants on plant species, the tests have been conducted in order to establish how pollution affects the internal structure of Douglas fir needles. The paper presents the results obtained by stereologic analyses of volume-density of mesophyllic cells, intercellular spaces, central cylinder, resin channels and vascular bundles through the cross-section of Douglas fir needles subjected to the direct influence of air- pollution in the area of Kolubara open-pit mine, as well as those from control localities on Jelova Gora and Juhor Mountain. Based on the research results, the decrease in volume density of chlorenchyma and the increase of intercellular spaces are reported in Douglas fir needles in polluted area as opposed to those in control locality, and the differences are statistically justifiable.
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