title: Involvement of ribosomal protein RPL27a in meristem activity and organ development.
abstract: The plant shoot apical meristem is established early during embryogenesis and subsequently gives rise to a shoot through reiterative generation of lateral organs and axillary meristems. In our recent manuscript we reported identification and characterization of a semi-dominant mutation in ribosomal protein RPL27a, which disrupts plant growth and shoot development.1 rpl27ac-1d effects on the shoot are evident from an early stage of embryo development. During embryogenesis rpl27-1d mutants are slow growing and are defective in apical patterning with a delay in establishment of the shoot meristem and outgrowth of cotyledons. Concomitant with this disturbed patterning, the shoot meristem genes SHOOT MERISTEMLESS (STM) and CUP-SHAPED COTYLEDON2 (CUC2) are misexpressed in outer cell layers of the rpl27ac-1d embryo and there is a delay in expression of the organ-patterning gene FILAMENTOUS FLOWER (FIL). Genetic interactions between rpl27ac-1d and other ribosomal protein mutants indicates rpl27ac-1d has reduced ribosome function. Our results highlight a role for ribosomal proteins in growth and development and we propose that the ribosome regulates specific patterning events during development.
authors: School of Biological Sciences, The University of Sydney 2006, New South Wales, Australia.
authors: Dóra
authors: D
authors: Szakonyi
authors: Mary E
authors: ME
authors: Byrne
mesh_terms: D017360:Arabidopsis / Q000196:embryology* / Q000378:metabolism* / Q000648:ultrastructure; D019521:Body Patterning; D056626:Inflorescence / Q000196:embryology / Q000648:ultrastructure; D018519:Meristem / Q000196:embryology* / Q000378:metabolism* / Q000648:ultrastructure; D038081:Organogenesis; D010641:Phenotype; D012269:Ribosomal Proteins / Q000378:metabolism*
chemical_list: C568126:RPL27a protein, Arabidopsis; D012269:Ribosomal Proteins