Diurnal oscillation in the accumulation of Arabidopsis microRNAs, miR167, miR168, miR171 and miR398
2009
Siré, Christelle | Moreno, Ana Beatriz | García-Chapa, Meritxell | López-Moya Gómez, Juan José | San Segundo, Blanca
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. © 2009 Federation of European Biochemical Societies.
显示更多 [+] 显示较少 [-]This work was funded by grants AGL2007-60229 and BIO2006- 05583 to J.J.L.M. and B.S.S., respectively, with support from the Center CONSOLIDER on Agrigenomics (MEC), and the ‘‘Xarxa de Referencia en Biotecnología” (Generalitat de Catalunya). M.G.C. is recipient of a Juan de la Cierva contract. C.S. is supported by MEC and CRAG contracts.
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