Part 1 Structural botany: cytology and morphogenesis of the prokaryotic cell, G.Drews; cytology and morphogenesis of pollen and spores, M.Hesse. Part 2 Physiology: plant water relations, R.Losch; mineral nutrition - inducible and repressible nutrient transport systems, U.Luttge; development - signals in the development of cryptograms, L.Jaenicke. Part 3 Genetics: replication, R.Echenlaub; construction and analysis of cyanobacterial mutants in photosynthesis research, C.Jansson and A.Lonneborg. Part 4 Taxonomy: systematics and evolution of the algae, M.Melkonian; taxonomy and phylogeny of fungi, W.Gams and W.Julich. Part 5 Geobotany: the history of flora and vegetation during the quaternary, B.Frenzel; ecotoxicology.