AbstractPolymorphism and ontogeny of 11 chicory (Cichorium intybusL.) enzymatic systems have been analyzed by native polyacrylamide gel electrophoresis, namely: leucine aminopeptidase, phosphoglucomutase, shikimate dehydrogenase, glutamate oxaloacetate transaminase, superoxide dismutase, isocitrate dehydrogenase, esterase, phosphorylase, glucose‐6‐phosphate dehydrogenase, 6‐phos‐phogluconate dehydrogenase and glucose phosphate isomerase. The use of these systems as biochemical markers is di