On the aperiodic locomotor behavior of Halobacterium salinarium under periodic light stimuli.
Two long time series of swimming intervals of a bacterium inverting its motion under periodic light pulses are analysed. The associated next-period plots reveal, through their filiform structure, that the underlying dynamics are low-dimensional. Using recently described properties of such dynamics, a simple second-order black-box model for the swimming intervals is derived and validated. The model reinforces the conjecture that this bacterium is endowed with an oscillator controlling the switching of the flagellar motor.
Casagrandi
Renato
R
Dipartimento di Elettronica e Informazione, Politecnico di Milano, Via Ponzio 34/5, Milano, 20133, Italy. casagran@elet.polimi.it
Rinaldi
Sergio
S
D019617:Halobacterium salinarum / Q000502:physiology*; D008954:Models, Biological; D009068:Movement / Q000502:physiology*; D010507:Periodicity; D010775:Photic Stimulation