Structural changes in spruce and fir needles.


Needles from spruce and fir trees were analyzed for histological changes induced by long-term exposure in open-top chambers to SO(2) and/or O(3) combined with acid rain. Light and electron microscopical evaluation revealed initial structural changes in the vascular bundle of fir needles, with an increased number of crushed sieve cells in the phloem. In… (More)


Cite this paper

@article{Schmitt1990StructuralCI, title={Structural changes in spruce and fir needles.}, author={Urban Schmitt and Martin Ruetze}, journal={Environmental pollution}, year={1990}, volume={68 3-4}, pages={345-54} }