INCREASE IN THEBAINE CONTENT OF PAPAVER-BRACTEATUM LINDL AFTER COLCHICINE TREATMENT OF SEEDS - ANNUAL FLUCTUATIONS IN THEBAINE LEVEL OF INDIVIDUAL PLANTS

From colchicine-treated seeds of Papaver bracteatum Lindl. some poppy plants were obtained that developed capsules richer in thebaine than t he controls. The individual poppies were analyzed for capsule thebaine content annually for eight successive years, the results revealing si gnificant year-to-year differences. One of the poppies, X7, (ca 5% the baine) developed capsules consisting partly of polyploid tissue during the first and second year. This plant was propagated vegetatively to give a series (the X7 series) of new P. bracteatum plants. The capsule thebaine content of these individuals differed markedly the first two years, whereupon the alkaloid production decreased and appeared to le vel out and reach a value still clearly higher than the controls (mean values 2.3% and 1.3%, respectively). From seeds of four of the thebai ne-rich poppies of the X7 series, four new series of P. bracteatum pla nts were obtained. The capsule thebaine level of these was significant ly lower than that of the mother plants.