Scientists' Contributions Table 1. Different microscopical alterations which ascertain ozone injury in the leaves with visible symptoms of 7 broad-leaved and 2 coniferous species from 2 recent expertises of Swiss and French samples (Pinus cembra L. analysed in collaboration with GIEFS, Nizza).
| Symptom type | Number of species | Indication | Confirmation of ozone injury |
|---|---|---|---|
| Necrosis in the mesophyll Enhanced vacuole and nucleus differentiation Induction of oligoproanthocyanidins Increase of total phenol content Starch retention Pectin cell wall projections | Broad-leaved species 5 / 7 4 / 7 6 / 7 5 / 7 5 / 7 2 / 7 | Oxidative stress Accelerated cell senescence Oxidative stress Stress / accelerated tissue ageing Inhibition of assimilate transport Oxidative stress | Boeard-leaved species 5 / 7 |
| Necrotic mesophyll cells Enhanced vacuole and nucleus differentiation Induction of oligoproanthocyanidins Increase of total phenol content Pectin cell wall projections |
coniferous species 1 / 2 1 / 2 1 / 2 0 / 2 0 / 2 | Oxidative stress Accelerated cell senescence Oxidative stress Stress / accelerated tissue ageing Oxidative stress | 1 / 2 |
Scientists' Contributions
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