Thompson K, Grime J P, Mason G
Unit of Comparative Plant Ecology, Natural Environment Research Council, Department of Botany, University of Sheffield, UK.
Nature. 1977 May 12;267(5607):147-9. doi: 10.1038/267147a0.
Diurnal fluctuations in temperature may initiate or accelerate germination in certain flowering plants, and the effectiveness of the stimulus varies according to the amplitude of fluctuation and the presence or absence of light. Attempts to assess the adaptive significance of the phenomenon, however, have been limited by the scarcity of data for species of contrasted ecology. We report here an investigation of germination responses to fluctuating temperatures, conducted on seeds of herbaceous species collected from native populations near Sheffield. The results suggest that requirements for diurnal fluctuations in temperature are characteristic of the germination of species from particular types of habitat and provide mechanisms which cause seeds to germinate at times and in places favourable for seedling establishment.
温度的昼夜波动可能会引发或加速某些开花植物的种子萌发，并且这种刺激的效果会因波动幅度以及光照的有无而有所不同。然而，由于缺乏不同生态类型物种的数据，评估这一现象适应性意义的尝试受到了限制。我们在此报告一项针对从谢菲尔德附近原生种群采集的草本植物种子进行的、关于温度波动对种子萌发影响的调查。结果表明，对温度昼夜波动的需求是特定栖息地类型物种萌发的特征，并提供了促使种子在有利于幼苗生长的时间和地点萌发的机制。
