Guillaume F M, Koukkari W L
Prog Clin Biol Res. 1987;227A:47-57.
Movements of the first trifoliolated leaf of Glycine max (L.) Merr. plants were monitored continuously for several weeks in a study that included 14 individual plants. Two types of high frequency oscillations that had periods of 1 hr or less were superimposed on the circadian profile of eight of the 14 plants. The first type of leaf movement was found to be an ultradian oscillation having periods that ranged from 45 to 62 min. These oscillations started 2 to 5 hr after the beginning of the 15-hr light span. Analysis by double complex demodulation revealed a progressive period elongation during the light span. The second type of leaf movement had a more complicated pattern with fast and irregular amplitude variations and appeared in the last 5-hr portion of the light span.
在一项涉及14株个体植物的研究中，连续数周监测了大豆（Glycine max (L.) Merr.）植株第一片三出复叶的运动。14株植物中的8株，其昼夜节律图谱上叠加了两种周期为1小时或更短的高频振荡。发现第一种类型的叶片运动是一种超日振荡，周期在45至62分钟之间。这些振荡在15小时光照期开始后的2至5小时开始。通过双复解调分析发现，在光照期内周期逐渐延长。第二种类型的叶片运动模式更为复杂，振幅变化快速且不规则，出现在光照期的最后5小时。
