CHEMOTAXONOMIC EVALUATION OF THE PAPAVER SECTION MACRANTHA
It must be taken into account the infraspecific polychemism given by the diversity of biosynthetic ways to build up alkaloids. Both physiological interventions can be realized: differentiated plant taxa choose alternatives of routes and can exert blockage too on these routes. This combination of alternations and blockings developed to various chemosyndromes whose similarities lead to systematize chemotaxonomically the totality of this section. Chemical differences of ontogenetic stages are associated with chemical differentiation of taxa, to get a unified biological phenomenon.
By reason of their chemotaxa P. orientale should be considered as more ancestral. Younger species, however, are able to block their biosynthetic routes. Most differentiated chemotaxa are to found with P. pseudo-orientale, but P. bracteatum and P. lasiothrix Fedde are well-developed, also; their alkaloid chemistry is able to realize blocking of biosynthetic ways.