A. Structural Botany.- I. Cytology and Morphogenesis of Fungal Cells.- II. Cytosymbiosis.- III. Cuticular Surfaces in Plants.- IV. A Dynamic Multidisciplinary Approach to Floral Morphology.- B. Physiology.- I. Cell Electrophysiology and Membrane Transport.- II. Phloem Transport.- III. Mineral Nutrition: Divalent Cations, Transport and Compartmentation.- IV. Secondary Plant Substances. Benzylisoquinoline Alkaloids.- V. Growth.- VI. Plant Movements and the Cytoskeleton.- C. Genetics.- I. Replication.- II. Recombination in Sexually Propagated Higher Plants.- III. Mutation: Higher Plants.- IV. Function of Genetic Material. Structure and Function of Regulatory Sequences.- V. Extranuclear Inheritance: Plastid Genetics.- VI. Population Genetics.- D. Taxonomy.- I. Palaeobotany.- II. Evolution and Classification of Seed Plants.- E. Geobotany.- I. Areal- und Florenkunde (Floristische Geobotanik).- II. Population Ecology.- III. Ecosystem Research (Ecological Botany).- F. Special Topics.- I. Symbiosen: Mykorrhiza a) Ektomykorrhiza.- b) Endomycorrhizae.