| Popis: |
1. An attempt was made to correlate the growth and development and morphine content of Yuma poppy, U.S.D.A. no. 17 (Papaver somniferum L.) grown under usual greenhouse conditions with that of plants grown under controlled temperatures and photoperiods. 2. The concentration of morphine (μg/gm dry weight) in organs of plants first grown on an 8-hour day, then on 18-hour photoperiods at 49-59 days after seed germination, and then transferred to natural daylengths in the greenhouse was greatest in the capsules, while none was detected in the seed. In plants harvested 32, 61, 98, 114, and 126 days after seed germination, the capsules collected at 98 days contained the highest concentration of morphine, while capsules collected at the last harvest contained the greatest amount of morphine (concentration x dry weight). On a whole-plant basis the greatest concentration of morphine was found in plants harvested 98 days after germination, whereas the greatest amount of morphine was found in plants collected after 9... |
