title: Diurnal oscillation in the accumulation of Arabidopsis microRNAs, miR167, miR168, miR171 and miR398.
abstract: MicroRNAs (miRNAs) are small RNAs acting as regulators of eukaryotic gene expression at the post-transcriptional level. Plant miRNAs have been implicated in developmental processes and adaptation to the environment. We show that the accumulation of four Arabidopsis miRNAs (miR171, miR398, miR168 and miR167) oscillates during the diurnal cycle, their accumulation increasing during the light period of the daytime and decreasing in darkness. This oscillatory pattern of miRNA accumulation is not governed by the circadian clock. These results suggest a potential role of light in controlling miRNA accumulation while defining a new level of regulation of miRNA gene expression in Arabidopsis.
authors.affiliation: Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB, Department of Molecular Genetics, Institut of Molecular Biology of Barcelona, CSIC, Barcelona, Spain.
authors.forename: Christelle
authors.initials: C
authors.lastname: Siré
authors.forename: Ana Beatriz
authors.initials: AB
authors.lastname: Moreno
authors.forename: Meritxell
authors.initials: M
authors.lastname: Garcia-Chapa
authors.forename: Juan José
authors.initials: JJ
authors.lastname: López-Moya
authors.forename: Blanca
authors.initials: B
authors.lastname: San Segundo
mesh_terms: D000220:Adaptation, Biological / Q000235:genetics; D017360:Arabidopsis / Q000235:genetics* / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000235:genetics; D060565:Argonaute Proteins; D002940:Circadian Rhythm / Q000235:genetics; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant / Q000502:physiology; D008027:Light; D035683:MicroRNAs / Q000235:genetics / Q000378:metabolism*; D014157:Transcription Factors / Q000235:genetics
chemical_list: C117457:AGO1 protein, Arabidopsis; D029681:Arabidopsis Proteins; D060565:Argonaute Proteins; D035683:MicroRNAs; D014157:Transcription Factors; C517136:auxin response factor 6, Arabidopsis