Contributors. Part 1: Verification of Response to Stress. Stress responses in Scots pine (Pinus sylvestris L.). Cloning and characterisation of an ozone-inducible pinysylvin methyltransferase; H. Chiron, et al. Screening of Sitka spruce genotypes for resistances to the White Pine Weevil in British Columbia; J.N. King, R.I. Alfaro. Genetic variation in two heavily polluted stands of Norway spruce (Picea abies [L] Karst.) as indicated by nuclear and organelle DNA markers; R. Riegel, et al. Effects of extreme SO2-air pollution in winter 1995/96 on vitality and growth of SO2-tolerant Norway spruce (Picea abies [L.] Karst.) clones in the Ore mountains; H. Wolf. Variation in adaptation and growth as indicated by provenance trial Platycladus orientalis (L.) Franco; X. Shen, X. Chen. Influence of nursery environment and pollution on alders; L. Mejnartowicz. Part 2: Genetic Variation under Diverse Environmental Conditions. Small scale spatial genetic structure of six tropical tree species in French Guiana; B. Degen, et al. Genetic variation in natural populations of Araucaria angustifolia (Bert.) O. Kuntze in Brazil; V.A. Sousa, H.H. Hattemer. Microsatellite DNA markers and their usefulness in poplars, and conservation of microsatellite DNA loci in Salicaceae; O.P. Rajora, M.H. Rahman. PCR-RFLP analysis of introns of nuclear genes in Populus and Prunus; B. Heinze. Genetic types in white oak populations north of the Alps and in the Danube valley; U.M. Csaikl, A.O. Konig. Highly polymorphic uniparentally inherited DNA markers for spatial genetic analysis of silver fir (Abies alba Mill.) populations; B. Ziegenhagen, et al. Levels of genetic differentiation in Pinus halepensis Mill. in Spain using quantitative traits, isozymes, RAPDs and cp-microsatellites; R. Alia, et al. Geographical variation of gene diversity of Pinus pinaster Ait. in the Iberian Peninsula; S.C. Gonzalez-Martinez, et al. Is autochthony an operational concept? F.N. Schoppa, H.-R. Gregorius. Part 3: Genetic Resources, Reproduction, Management. Molecular markers in sustainable management, conservation, and restoration of forest genetic resources; O.P. Rajora, A. Mosseler. Sustainable treatment of resources: The genetic basis; H.-R. Gregorius. Genetic diversity and differentiation of individual effective pollen clouds in trees; H.H. Hattemer, et al. Microsatellite analysis of small anonymous seedlot samples from pedunculate oak (Quercus robur): a promising approach to monitor the number of different seed parents and pollen donors; C. Lexer, et al. Fructification and genetic structures of Fagus sylvatica mixed stands in upper regions of the Harz mountains; D. Krabel, et al. Dispersal of seed and effective pollen in small stands of European beech (Fagus sylvatica L.); K. Wang, H.H. Hattemer. Patterns of seed dispersal in a scattered forest tree species (Sorbus torminalis) based on multi-scale investigation of population genetic structure for chloroplast DNA; S. Oddou-Muratorio, et al. Gene flow and mating system in a seedling seed orchard and a natural stand of Pinus merkusii Jungh. et de Vriese in Indonesia; I.Z. Siregar, H.H. Hattemer. The pattern of genetic variation in Pinus nigra subspecies pallasiana natural populations from the Kazdagi and Bolkar mountains, Turkey: Implications for in situ gene conservation; Z. Kaya, et al. Genetic variation of silver fir (Abies alba) in unevenaged forests (`Plenter' forest) in comparison with evenaged forests (Altersklassenwald); M. Konnert, E. Hussendorfer. Part 4: Tree Breeding for Uncertain Future Environments. Multiple population breeding for uncertain climatic futures with Alnus rubra: ecological genetics and selection experiments; A. Hamann, et al. Early growth characteristics of some Abies hybrids; A. Kormutak, B. Vookova. Field testing of model populations of Norway spruce (Picea abies [L.] Karst.) with different genetic structures for reforestation in air polluted regions; H. Hertel, M. Paul. Provenance-environment interactions of Norway spruce (Picea abies [L.] Karst.) on German and Hungarian test sites; M. Liesebach, et al.