Entrainaient of the ultradian leaf movement rhythm ofDesmodium gyransby temperature cycles

Abstract

The ultradian rhythm of movement of the lateral leaflet of Desmodium gyrans can be entrained by temperature cycles, provided that the entrained Zeitgeber period is less than that of the free‐running period. The rhythm is sensitive to single pulses; the phase response curves show times of large phase advances and of zero changes, but no phase delays. The rhythm is highly temperature dependent with temperature coefficients of around 2.5.