In 1958 E. BUNNING published a book in the former series "Proto- plasmatologia" entitled "Polaritat und inaquale Teilung des pflanzlichen Protoplasten" (polarity and unequal division of the plant protoplast) in which for the first time results of experimental plant cytomorphogenesis were re- viewed. This book was based completely on light microscopic observations and rather simple experimental techniques. Since then our knowledge of basic cytomorphogenetic...