Floral Inhibition in Lemna paucicostata 6746 Due to Night Interruption

概要

論文の詳細を見る
The floral response to various 24-h photoperiodic cycles of the short-day plant, Lemna paucicostata 6746 was investigated. No day that had a main photoperiod longer than about 14 h was able to induce flowers, evidence that the critical day length was ca. 14 h. Flowering in the 12-, 9- or 6-h day was inhibited completely by a light pulse inserted daily in the 'inhibition zone' that ranged from about 14 h after the preceding dawn to about 14 h before the next dusk. In the 3- and 1-h days, only the pulse applied 14 h after the dawn completely inhibited flowering. These results suggest that the daily night interruption prohibited flowering only when it was linked to either the preceding or the subsequent main photoperiod to form a skeleton photoperiod whose length was equal to, or longer than, the critical day length. Analysis of the floral response to skeleton schedules 11:13 and 13:11 on Pittendrigh's model of the photoperiodic clock indicated that light-on circadian oscillation probably is involved in the day length measurement.
日本植物生理学会の論文