Department of Horticulture, University of Wisconsin, Madison, Wisconsin 53706.
Plant Physiol. 1970 Jul;46(1):99-102. doi: 10.1104/pp.46.1.99.
Leaf movements of primary leaves of Phaseolus angularis Wight. were studied in an environment with controlled levels of CO(2), relative humidity, temperature, light, nutrient concentrations, and water tension. Rhythmic circadian movements and irregular short period movements were evident as the leaves unfolded and persisted during development of the leaves. The mean period in rhythmic circadian movement was 27.3 hours with no significant differences in period between plants of the same or different experiments. The leaf movements of separate plants were not closely synchronized.A system is described for growing plants for extended periods while collecting data with time lapse photography. The system was developed to minimize disturbances to the plants.The occurrence of leaf movements in plants grown from the time of seeding in an environment free of any recognized fluctuation which could stimulate leaf movements supports the hypothesis that leaf movement rhythms originate spontaneously within the plant.
菜豆（Phaseolus angularis Wight.）初生叶的运动在控制 CO(2)、相对湿度、温度、光照、养分浓度和水张力水平的环境中进行了研究。叶片展开并在发育过程中持续存在时，出现了有节奏的昼夜节律运动和不规则的短周期运动。有节奏的昼夜节律运动的平均周期为 27.3 小时，同一实验或不同实验的植物之间的周期没有显著差异。单独植物的叶片运动没有紧密同步。描述了一种用于在延长的时间段内种植植物同时进行延时摄影数据收集的系统。该系统旨在最小化对植物的干扰。在没有任何已知刺激叶片运动的波动的环境中从播种开始生长的植物中发生叶片运动，这支持了叶片运动节律自发起源于植物内部的假说。
