The circadian CO 2 exchange rhythm of the CAM plant Kalanchoë daigremontiana Hamet et Perrier de la Bâthie in continuous light has been exposed to various thermoperiodic perturbation patterns. Under a fixed thermocycle period of 16-h the time of temperature exposure has been varied, yielding asymmetric temporal patterns of the perturbation. The data are analyzed considering frequency spectra and a correlation analyses of temperature and gas exchange time series. It is shown that short hightemperature patterns…
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