title: Changes in isoperoxidases during shoot formation in tobacco callus.
abstract: Shoot formation in tobacco (Nicotiana tabacum L.) callus is accompanied by an increase in peroxidase activity which takes a form similar to a sigmoid curve. The "stationary" phase coincides with the period of organ formation. Characteristic changes in isoperoxidase pattern are found in the shoot-forming part of the callus. These changes are different from those in the nonshoot-forming part or in gibberellin-treated tissue, which does not form shoots.
mesh_terms: D046508:Culture Techniques; D005875:Gibberellins / Q000494:pharmacology; D010544:Peroxidases / Q000378:metabolism*; D010947:Plants, Toxic; D014026:Nicotiana / Q000201:enzymology* / Q000254:growth & development
chemical_list: D005875:Gibberellins; D010544:Peroxidases