ZEITLUPE promoter activity is modulated in an EARLY BIRD dependent manner in response to abscisic acid
(English)Manuscript (preprint) (Other academic)
The newly described clock regulator EARLY BIRD (EBI) was shown to interact with ZEITLUPE (ZTL) and to influence the function of the core circadian oscillator. Studiesof mutants in the EBI locus have earlier been used to ascribe a role for EBI in responsesto abiotic stress.Here, we test the early bird-1 (ebi-1) clock mutant’s response to salt stress. Also, weprobe the effect on the expression and regulation of clock associated genes in response tothe known stress signaling modulator, abscisic acid (ABA). We show that ZTL promoteractivity is under circadian clock control and that these oscillations are stabilized to morerobust rhythms in response to ABA. The clock regulation of ZTL is found to beindependent of EBI and different from the regulation of CAB2 suggesting that they, atleast partially, are driven by separate oscillators. In addition, EBI appears to modulate thestabilization of these oscillations in response to ABA suggesting that it may act as amediator between oscillators and in the clock’s response to stress.
Circadian clock, Arabidopsis
Biochemistry and Molecular Biology
Research subject Molecular Biology
IdentifiersURN: urn:nbn:se:umu:diva-35867OAI: oai:DiVA.org:umu-35867DiVA: diva2:349782