Two Arabidopsis circadian oscillators can be distinguished by differential temperature sensitivity.

ABSTRACT: Circadian rhythms are widespread in nature and reflect the activity of an endogenous biological clock. In metazoans, the circadian system includes a central circadian clock in the brain as well as distinct clocks in peripheral tissues such as the retina or liver. Similarly, plants have distinct clocks in different cell layers and tissues. Here, we show that two different circadian clocks, distinguishable by their sensitivity to environmental temperature signals, regulate the transcription of genes that are expressed in the Arabidopsis thaliana cotyledon. One oscillator, which regulates CAB2 expression, responds preferentially to light-dark versus temperature cycles and fails to respond to the temperature step associated with release from stratification. The second oscillator, which regulat

SUBMITTER: Michael TP 

PROVIDER: S-EPMC164540 | biostudies-literature | 2003 May

REPOSITORIES: biostudies-literature