1. Stress tolerance in plants - the evolutionary framework.- 2. Heavy metal resistance in higher plants: biochemical and genetic aspects.- 3. Free radicals and heavy metal tolerance.- 4. Physiological responses of higher plants to soil contamination with metals.- 5. Arsenic in water, sediment and vegetation of the Jales gold mine, North Portugal.- 6. Ecophysiological adaptations of higher plants in natural communities to waterlogging.- 7. Effects of inundation stress on salt marsh halophytes.- 8. Water as a stress factor in the coastal dune system.- 9. Natural and man-made environmental stresses in coastal wetlands.- 10. Economic uses of salt marshes.- 11. Occurrence and function of mycorrhiza in environmentally stressed soils.- 12. Contamination of coastal wetlands with heavy metals: factors affecting uptake of heavy metals by salt marsh plants.- 13. Population ecology of plant species in disturbed forest and grassland habitats.- 14. Ecological responses of macro- and microphytic algae to water pollution.- 15. Common reed.- 16. The impact of oil pollution on salt marsh vegetation.- 17. Effects of air pollution on plants and vegetations.- 18. Air pollution and reproductive processes in natural plant species.- 19. Developments and present status of terrestrial ecotoxicology.- 20. Global change, the impact of the greenhouse effect (atmospheric CO2 enrichment) and the increased UV-B radiation on terrestrial plants.- 21. The genetics and ecology of variation in secondary plant substances.- 22. Phenolic substances in forest leaf litter and their impact on plant growth in forest vegetations.- 23. Plant responses to human activities in the tropical savanna ecosystem of Botswana.- 24. Agricultural problems of saline arable land in Pakistan.- 25. Genetic variability in Orobanche (broomrape) and Striga (witchweed) and its implications for host crop resistance breeding.