H. BINDING and J. REINERT In collaboration with the first authors of this volume This volume is devoted to the development of cell clones and plants from ma- nipulated cells: isolated protoplasts, cell fusion bodies, and transformed cells. Isolated protoplasts represent cells which are liberated from their walls and separated from the differentiation pattern of the organism. Investigations on re- generation from protoplasts provide a better understanding of the process and control of developmental pathways. Whereas protoplast isolation results in alteration of the state of differentiation of...