Charles E. Hess Department of Environmental Horticulture University of California Davis, CA 95616 Research in the biology of adventitious root formation has a special place in science. It provides an excellent forum in which to pursue fundamental research on the regulation of plant growth and development. At the same time the results of the research have been quickly applied by commercial plant propagators, agronomists, foresters and horticulturists (see the chapter by Kovar and Kuchenbuch, by Ritchie, and by Davies and coworkers in this volume). In an era when there is great interest in speeding technology transfer, the experiences gained in research in adventitious root formation may provide useful examples for other areas of science. Interaction between the fundamental and the applied have been and continue to be facilitated by the establishment, in 1951, of the Plant Propagators' Society, which has evolved into the International Plant Propagators' Society, with active programs in six regions around the world. It is a unique organization which brings together researchers in universities, botanical gardens and arboreta, and commercial plant propagators. In this synergistic environment new knowledge is rapidly transferred and new ideas for fundamental research evolve from the presentations and discussions by experienced plant propagators. In the past 50 years, based on research related to the biology of adventitious root formation, advances in plant propagation have been made on two major fronts.

Preface; A. Altman, Y. Waisel. Diversity of Roots: The Place of Roots in Plant Development and the Diversity of Root Types; P.W. Barlow, B. Palma. Induction of Roots and Their Development: Indissociable Chief Actors in the Inductive Phase of Adventitious Rooting; T. Gaspar et al. Hormonal Control of Root Induction and Development: Increased Induction of Adventitious Rooting via Slow Release Auxins and Elicitors; van der Krieken et al. Molecular Biology of Root Development: Auxin Induced Gene Expression During Rooting of Loblolly Pine Stem Cuttings; B. Goldfarb et al. Ecological Aspects of Root Development: Shootborne Roots: An Adaptive Organ in Sand Dunes; A. Danin. Applied Aspects of Root Development: Relations between Early Root Growth and Flower Yield of Clonal Rose Rootstocks; D.P. de Vries, L.A.M. Dubois. Root Products: Insane Roots and Twisted Carrots: Physiology and Biochemistry of Root Specific Metabolites; H.E. Flores. Models and Methods for Root Study: Morphological Structured Model for Hairy Root Culture; I. Berzin et al. Concluding Remarks: A 1996 Overview of the Research Interests from the Jerusalem Symposium T. Gaspar. 71 additional articles. Index.

Charles E. Hess Department of Environmental Horticulture University of California Davis, CA 95616 Research in the biology of adventitious root formation has a special place in science. It provides an excellent forum in which to pursue fundamental research on the regulation of plant growth and development. At the same time the results of the research have been quickly applied by commercial plant propagators, agronomists, foresters and horticulturists (see the chapter by Kovar and Kuchenbuch, by Ritchie, and by Davies and coworkers in this volume). In an era when there is great interest in speeding technology transfer, the experiences gained in research in adventitious root formation may provide useful examples for other areas of science. Interaction between the fundamental and the applied have been and continue to be facilitated by the establishment, in 1951, of the Plant Propagators' Society, which has evolved into the International Plant Propagators' Society, with active programs in six regions around the world. It is a unique organization which brings together researchers in universities, botanical gardens and arboreta, and commercial plant propagators. In this synergistic environment new knowledge is rapidly transferred and new ideas for fundamental research evolve from the presentations and discussions by experienced plant propagators. In the past 50 years, based on research related to the biology of adventitious root formation, advances in plant propagation have been made on two major fronts.

Preface; A. Altman, Y. Waisel. Diversity of Roots: The Place of Roots in Plant Development and the Diversity of Root Types; P.W. Barlow, B. Palma. Induction of Roots and Their Development: Indissociable Chief Actors in the Inductive Phase of Adventitious Rooting; T. Gaspar et al. Hormonal Control of Root Induction and Development: Increased Induction of Adventitious Rooting via Slow Release Auxins and Elicitors; van der Krieken et al. Molecular Biology of Root Development: Auxin Induced Gene Expression During Rooting of Loblolly Pine Stem Cuttings; B. Goldfarb et al. Ecological Aspects of Root Development: Shootborne Roots: An Adaptive Organ in Sand Dunes; A. Danin. Applied Aspects of Root Development: Relations between Early Root Growth and Flower Yield of Clonal Rose Rootstocks; D.P. de Vries, L.A.M. Dubois. Root Products: Insane Roots and Twisted Carrots: Physiology and Biochemistry of Root Specific Metabolites; H.E. Flores. Models and Methods for Root Study: Morphological Structured Model for Hairy Root Culture; I. Berzin et al. Concluding Remarks: A 1996 Overview of the Research Interests from the Jerusalem Symposium T. Gaspar. 71 additional articles. Index.