Sekretorische Aktivität des Flexural- und Subcommissuralorgans bei frühen Entwicklungsstadien vonTriturus alpestris Laur

Summary The development of Reissner's fibre (RF) by secretory activity of the flexural and subcommissural organ was studied in early ontogenetical stages ofTriturus alpestris. In young stages RF arises from the flexural organ, which gradually reduces its secretory activity in the following stages. Now the secretion of the subcommissural organ becomes predominant and begins to form the RF. After the hatching of larvae, only the subcommissural organ produces the RF.