title: Epigenetic repressor-like genes are differentially regulated during grapevine (Vitis vinifera L.) development.
abstract: Grapevine sexual reproduction involves a seasonal separation between inflorescence primordia (flowering induction) and flower development. We hypothesized that a repression mechanism implicating epigenetic changes could play a role in the seasonal separation of these two developmental processes in grapevine. Therefore, the expression of five grapevine genes with homology to the Arabidopsis epigenetic repressor genes FERTILIZATION INDEPENDENT ENDOSPERM (FIE), EMBRYONIC FLOWER 2 (EMF2), CURLY LEAF (CLF), MULTICOPY SUPPRESSOR OF IRA 1 (MSI1) and SWINGER (SWN) was analyzed during the development of buds and vegetative and reproductive organs. During bud development, the putative grapevine epigenetic repressor genes VvCLF, VvEMF2, VvMSI1, VvSWN and VvFIE are mainly expressed in latent buds at the flowering induction period, but also detected during bud burst and inflorescence/flower development. The overlapping expression patterns of grapevine PcG-like genes in buds suggest that chromatin remodeling mechanisms could be operating during grapevine bud development for controlling processes such as seasonal flowering, dormancy and bud burst. Furthermore, the expression of grapevine PcG-like genes was also detected in fruits and vegetative organs, suggesting that epigenetic changes could be at the basis of the regulation of various proliferation-differentiation cell transitions that occur during grapevine development.
authors.affiliation: Instituto de Biología Vegetal y Biotecnología, Universidad de Talca, Talca, Chile. ralmada@inia.cl
authors.forename: Rubén
authors.initials: R
authors.lastname: Almada
authors.forename: Nuri
authors.initials: N
authors.lastname: Cabrera
authors.forename: José A
authors.initials: JA
authors.lastname: Casaretto
authors.forename: Hugo
authors.initials: H
authors.lastname: Peña-Cortés
authors.forename: Simón
authors.initials: S
authors.lastname: Ruiz-Lara
authors.forename: Enrique
authors.initials: E
authors.lastname: González Villanueva
mesh_terms: D000595:Amino Acid Sequence; D003001:Cloning, Molecular; D044127:Epigenesis, Genetic; D035264:Flowers / Q000235:genetics / Q000254:growth & development; D005638:Fruit / Q000235:genetics / Q000254:growth & development; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D008969:Molecular Sequence Data; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D018520:Plant Shoots / Q000235:genetics / Q000254:growth & development; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism*; D012098:Reproduction / Q000235:genetics; D027843:Vitis / Q000235:genetics / Q000254:growth & development*
chemical_list: D010940:Plant Proteins; D012097:Repressor Proteins