Preface. I: Structural and Molecular Aspects of Root Growth and Development. Histochemical analysis of root meristem activity in Arabidopsis thaliana using a cyclin:GUS (beta-glucuronidase) marker line; M.-T. Hauser, E. Bauer. Ultrastructural effects of the herbicide chlorpropham (CIPC) in root tip cells of wheat; E.P. Eleftheriou, E. Bekiari. Measurement of viscoelastic properties of root cell walls affected by low pH in lateral roots of Pisum sativum L.; E. Tanimoto, et al. Secondary dilatation growth in the root endodermis; A. Lux, M. Luxova. Changes of root structure in connection with the development of lateral root primordia in wheat and pumpkins; K.N. Demchenko, N.P. Demchenko. Some aspects of endodermis and cortex structure in Dryas roots; K.M. Barmicheva, M.F. Danilova. IAA and ZR content in leek (Allium porrum L.), as influenced by P nutrition and arbuscular mycorrhizae, in relation to plant development; A. Torelli, et al. Polyploidy in tomato roots as affected by arbuscular mycorrhizal colonization; G. Berta, et al. II: Physiology of Water and Ion Uptake. Water uptake by plant roots: an integration of views; E. Steudle. Root-shoot interactions in mineral nutrition; W.D. Jeschke, W. Hartung. Calcium channels in the plasma membrane of root cells: Their roles in mineral nutrition and cell signalling; P.J. White, M.S. Ridout. Nitrogen and base cation uptake in seedlings of Acer pseudoplatanus and Calamagrostis villosa exposed to an acidified environment; V. Gloser, J. Gloser. Nitrate uptake by bean (Phaseolus vulgaris L.) roots under phosphate deficiency; A. Gniazdowska, A.M. Rychter.Nitrate reductase in roots: Succinate- and NADH-dependent plasma membrane-bound forms; C. Stoehr, et al. Impact of Agrobacterium tumefaciens-induced stem tumors on NO 3 uptake in Ricinus communis; I. Mistrik, et al. Fast shoot responses to root treatment. Are hormones involved?; G. Kudoyarova, et al. III: Root under Stress Conditions. Response of tomato plants to chilling stress in association with nutrient or phosphorus starvation; Z. Starck, et al. Effect of water stress upon root meristems of pea seedlings: The role of quantitative and qualitative changes in protein patterns; D. Chiatante, et al. The distribution of lead in duckweed (Lemna minor L.) root tip; S. Samardakiewicz, A. Wo ny. Lead effects on cereal roots in terms of cell growth, root architecture and metal accumulation; N.V. Obroucheva, et al. Diverse responses of root cell structure to aluminium stress; M. iamporova. Relationship between microtubule orientation and patterns of cell expansion in developing cortical cells of Lemna minor roots; S. Inada, S. Sato.