“…It was demonstrated that circumnutation is influenced by various external stimuli including gravity, temperature, mechanical stress and static magnetic fields (Zachariassen et al 1987, Zachariassen and Johnsson 1988, Ginzo and Décima 1995, AndersonBernadas et al 1997, Schuster and Engelmann 1997, Hatakeda et al 2003, Stolarz et al 2003, however, a clear relationship between irradiance and circumnutation has not been demonstrated. The aim of the present paper was to study the influence of irradiance on the circumnutation using Arabidopsis inflorescence stems A. thaliana (L.) Heynh, ecotype Columbia was used in this study.…”