ELF3 Modulates Resetting of the Circadian Clock in Arabidopsis

摘要: The Arabidopsis early flowering 3 ( elf3 ) mutation causes arrhythmic circadian output in continuous light, but there is some evidence of clock function darkness. Here, we show conclusively that normal occurs with no alteration period length mutants dark conditions and the light-dependent arrhythmia observed pleiotropic on multiple outputs normally expressed at different times day. Plants overexpressing ELF3 have an increased both constant blue red light; furthermore, etiolated ELF3-overexpressing seedlings exhibit a decreased acute CAB2 response after light pulse, whereas null mutant hypersensitive to induction. This finding suggests negatively regulates input its outputs. To determine whether ELF3’s action phase dependent, examined resetting by using pulses constructed curves. Absence activity significant curve during subjective night, constitutive overexpression results sensitivity stimulus, suggesting antagonizes night. correlates peak expression levels action, therefore, represents mechanism which oscillator modulates resetting.