title: Arabidopsis ribosomal proteins control developmental programs through translational regulation of auxin response factors.
abstract: Upstream ORFs are elements found in the 5'-leader sequences of specific mRNAs that modulate the translation of downstream ORFs encoding major gene products. In Arabidopsis, the translational control of auxin response factors (ARFs) by upstream ORFs has been proposed as a regulatory mechanism required to respond properly to complex auxin-signaling inputs. In this study, we identify and characterize the aberrant auxin responses in specific ribosomal protein mutants in which multiple ARF transcription factors are simultaneously repressed at the translational level. This characteristic lends itself to the use of these mutants as genetic tools to bypass the genetic redundancy among members of the ARF family in Arabidopsis. Using this approach, we were able to assign unique functions for ARF2, ARF3, and ARF6 in plant development.
authors.affiliation: Center for Plant Cell Biology and Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA.
authors.forename: Abel
authors.initials: A
authors.lastname: Rosado
authors.forename: Ruixi
authors.initials: R
authors.lastname: Li
authors.forename: Wilhelmina
authors.initials: W
authors.lastname: van de Ven
authors.forename: Emily
authors.initials: E
authors.lastname: Hsu
authors.forename: Natasha V
authors.initials: NV
authors.lastname: Raikhel
mesh_terms: D029681:Arabidopsis Proteins / Q000502:physiology*; D018506:Gene Expression Regulation, Plant / Q000502:physiology*; D007210:Indoleacetic Acids / Q000378:metabolism*; D016366:Open Reading Frames; D014176:Protein Biosynthesis / Q000502:physiology*; D021381:Protein Transport; D012269:Ribosomal Proteins / Q000502:physiology*; D015398:Signal Transduction; D014617:Vacuoles / Q000378:metabolism
chemical_list: D029681:Arabidopsis Proteins; D007210:Indoleacetic Acids; D012269:Ribosomal Proteins