Revealing the hierarchy of processes and time-scales that control the tropic response of shoots to gravi-stimulations.

摘要: Experiments on shoot gravitropism at the plant and cell scale reveal existence of a memory process provide unifying framework for predicting bending response shoots to arbitrary gravi-stimulations. Abstract Gravity is major abiotic cue growth. However, little known about responses plants various patterns gravi-stimulation, with apparent contradictions being observed between dose-like recorded under transient stimuli in microgravity environments steady-state inclinations earth. Of particular importance how gravitropic an organ affected by temporal dynamics downstream processes signalling pathway, such as statolith motion statocytes or redistribution auxin transporters. Here, we used combination experiments whole-plant live-cell imaging techniques wheat coleoptiles centrifuge devices investigate both kinematics shoot-bending induced inclination, statoliths inclination. Unlike previous observations microgravity, appears be independent level gravity, time much longer than duration sedimentation. This reveals dynamics. By combining this motion, mathematical model built that unifies different laws found literature predicts early