| [peculiarities of circadian rhythms in plants from different geographical latitudes]. | 1 two species of plants (taraxacum arcticum and arnica angustifolia), collected in spitsbergen (geogr. latitude 76-80 degrees) exhibit endogenous circadian leaf movements but also movements with shorter periods. astragalus frigidus, a. alpinus and hedysarum hedysaroides, collected in arctic regions of continental europe, also show endogenous diurnal leaf movements. 2. in most of the species tested, there was no difference in the length of the free running periods of plants from arctic and centra ... | 1966 | 24557984 |