Part 1 Structural botany: cytology and morphogenesis of fungal cells, H.R. Hohl; cytosymbiosis and its significance in cell evolution, P. Sitte and S. Eschbach; comparative morphology and anatomy of the stem of flowering plants, W.C. Dickison. Part 2 Physiology: mineral nutrition, U. Luttge and D.T. Clarkson; secondary plant substances, H.R. Schutte; locomotion, G. Sembdner, et al; cell physiology - ubiquitin, M. Wettern. Part 3 Genetics: replication, W. Nagl; recombination - reconstruction of agronomically important characters by recombinant DNA technology, V. Hahn and W. Friedt; mutation - higher plants, W. Gottschalk; function of genetic material - activity of genes in transgenic plants, R. Blaich; extra-nuclear inheritance - plastid genetics, K. Fritzsche and R. Hagemann; microbes and microbial products in plant protection, L. Lange; popular genetics, K. Wohrmann. Part 4 Taxonomy: evolution and classification of seed plants, M. Liden; paleobotany, E.M. Friis; morphology and ecology of lichenized fungi, H.M. Jahns. Part 5 Geobotany: the history of flora and vegetation during the quarternary, B. Frenzel; population genetics, R. Cornelius; terrestrial ecosystem research (ecological botany), W. Schmidt.