Suppression of chaos by periodic oscillations in a model for cyclic AMP signalling in Dictyostelium cells.
We investigate how the introduction of cells oscillating periodically affects the behaviour of a suspension of Dictyostelium discoideum amoebae undergoing chaotic oscillations of cyclic AMP. The analysis of a model indicates that a tiny proportion of periodic cells suffices to transform chaos into periodic oscillations in such suspensions. A similar result is obtained by forcing the aperiodic oscillations by a small-amplitude, periodic input of cyclic AMP. The results provide an explanation for the observation of regular oscillations in suspensions of a putatively chaotic mutant of Dictyostelium discoideum. More generally, the results show how chaos in biological systems may disappear through the coupling with periodic oscillations.
Li
Y
Y
Faculté des Sciences, Université Libre de Bruxelles, Belgium.
Halloy
J
J
Martiel
J L
JL
Wurster
B
B
Goldbeter
A
A
D000818:Animals; D000242:Cyclic AMP / Q000378:metabolism*; D004023:Dictyostelium / Q000378:metabolism*; D008433:Mathematics; D010507:Periodicity; D015398:Signal Transduction
D000242:Cyclic AMP