title: Phototropins do not alter accumulation of evening-phased circadian transcripts under blue light.
abstract: The circadian system induces rhythmic variation in a suite of biochemical and physiological processes that serve to optimise plant growth in diel cycles. To be of greatest utility, these rhythmic behaviors are coordinated with regular environmental changes such as the rising and setting of the sun. Photoreceptors, along with metabolites produced during photosynthesis, act to synchronise the internal timing mechanism with lighting cues. We have recently shown that phototropins help maintain robust rhythms of photosynthetic operating efficiency (ϕPSII or Fq'/Fm') under blue light, although rhythmic accumulation of morning-phased circadian transcripts in the nucleus was unaffected. Here we report that evening-phased nuclear clock transcripts were also unaffected. We also observe that rhythms of nuclear clock transcript accumulation are maintained in phototropin mutant plants under a fluctuating lighting regime that induced a loss of Fq'/Fm' rhythms.
authors.affiliation: a School of Biological Sciences, University of Essex , Wivenhoe Park, United Kingdom.
authors.forename: Suzanne
authors.initials: S
authors.lastname: Litthauer
authors.affiliation: a School of Biological Sciences, University of Essex , Wivenhoe Park, United Kingdom.
authors.forename: Martin W
authors.initials: MW
authors.lastname: Battle
authors.affiliation: a School of Biological Sciences, University of Essex , Wivenhoe Park, United Kingdom.
authors.forename: Matthew A
authors.initials: MA
authors.lastname: Jones
mesh_terms: D017360:Arabidopsis / Q000378:metabolism* / Q000528:radiation effects; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism; D057906:Circadian Clocks / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism; D008027:Light; D055537:Light Signal Transduction; D056949:Phototropins / Q000378:metabolism / Q000502:physiology*; D012333:RNA, Messenger; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; C114425:CCA1 protein, Arabidopsis; D004268:DNA-Binding Proteins; C113192:LHY protein, Arabidopsis; C514751:PRR9 protein, Arabidopsis; D056949:Phototropins; D012333:RNA, Messenger; C411822:TOC1 protein, Arabidopsis; D014157:Transcription Factors
keywords: Arabidopsis; Fq′/Fm′; PSII operating efficiency; chlorophyll a fluorescence; circadian; phototropin; ϕPSII