Feinstrukturelle Untersuchungen an Nadeln geschädigter Tannen und Fichten aus Waldschadensgebieten im Schwarzwald

Fine structural studies on the needles of damaged fir (Abies alba Mill.) and spruce Picea abics (L.) Karst.] trees from forest dieback areas in the Black Forest . The fine structural changes in the variously damaged needles of fir and spruce trees from forest dieback areas have been investigated with special reference to cytoplasmie organization in the vascular bundles, mesophyll tissue and cuticle. The results are compared with those available for a few plants affected both by natural and artificial stress factors, especially air pollutants.