biostudies-literatureSu SHNASANational Aeronautics and Space AdministrationNational Science Foundation1540https://www.ebi.ac.uk/biostudies/studies/S-EPMC9861679biostudies-literatureUnknown24(2)Clinostats are instruments that continuously rotate biological specimens along an axis, thereby averaging their orientation relative to gravity over time. Our previous experiments indicated that low-speed clinorotation may itself trigger directional root tip curvature. In this project, we have investigated the root curvature response to low-speed clinorotation using <i>Arabidopsis thaliana</i> and <i>Brachypodium distachyon</i> seedlings as models. We show that low-speed clinorotation triggers root tip curvature in which direction is dictated by gravitropism during the first half-turn of clinorotation. We also show that the angle of root tip curvature is modulated by the speed of clinorotation. <i>Arabidopsis</i> mutations affecting gravity susception (<i>pgm</i>) or gravity signal transduInternational journal of molecular sciencesLow-Speed Clinorotation of <i>Brachypodium distachyon</i> and <i>Arabidopsis thaliana</i> Seedlings Triggers Root Tip Curvatures That Are Reminiscent of Gravitropism.PMC98616791951182-IOS80NSSC18K1481Groskopf RMSu SHMasson PHVesperman BBaldwin KLMoen AfalseLow-Speed Clinorotation of <i>Brachypodium distachyon</i> and <i>Arabidopsis thaliana</i> Seedlings Triggers Root Tip Curvatures That Are Reminiscent of Gravitropism.Clinostats are instruments that continuously rotate biological specimens along an axis, thereby averaging their orientation relative to gravity over time. Our previous experiments indicated that low-speed clinorotation may itself trigger directional root tip curvature. In this project, we have investigated the root curvature response to low-speed clinorotation using <i>Arabidopsis thaliana</i> and <i>Brachypodium distachyon</i> seedlings as models. We show that low-speed clinorotation triggers root tip curvature in which direction is dictated by gravitropism during the first half-turn of clinorotation. We also show that the angle of root tip curvature is modulated by the speed of clinorotation. <i>Arabidopsis</i> mutations affecting gravity susception (<i>pgm</i>) or gravity signal transdu2023-01-01T00:00:00Z2023 Jan2025-08-15T03:05:44.983Z2025-08-15T03:05:44.983ZS-EPMC98616793667505410.3390/ijms24021540