title: De Novo Transcriptome Sequencing of Olea europaea L. to Identify Genes Involved in the Development of the Pollen Tube.
abstract: In olive (Olea europaea L.), the processes controlling self-incompatibility are still unclear and the molecular basis underlying this process are still not fully characterized. In order to determine compatibility relationships, using next-generation sequencing techniques and a de novo transcriptome assembly strategy, we show that pollen tubes from different olive plants, grown in vitro in a medium containing its own pistil and in combination pollen/pistil from self-sterile and self-fertile cultivars, have a distinct gene expression profile and many of the differentially expressed sequences between the samples fall within gene families involved in the development of the pollen tube, such as lipase, carboxylesterase, pectinesterase, pectin methylesterase, and callose synthase. Moreover, different genes involved in signal transduction, transcription, and growth are overrepresented. The analysis also allowed us to identify members in actin and actin depolymerization factor and fibrin gene family and member of the Ca(2+) binding gene family related to the development and polarization of pollen apical tip. The whole transcriptomic analysis, through the identification of the differentially expressed transcripts set and an extended functional annotation analysis, will lead to a better understanding of the mechanisms of pollen germination and pollen tube growth in the olive.
authors.affiliation: Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria (CREA), Centro di Ricerca per l'Olivicoltura e l'Industria Olearia (OLI), 87036 Rende, Italy.
authors.forename: Domenico
authors.initials: D
authors.lastname: Iaria
authors.affiliation: Università della Calabria, Dipartimento di Biologia, Ecologia e Scienze della Terra, Ponte Pietro Bucci, 87036 Arcavacata di Rende, Italy.
authors.forename: Adriana
authors.identifier: 0000-0001-9725-9905
authors.initials: A
authors.lastname: Chiappetta
authors.affiliation: Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria (CREA), Centro di Ricerca per l'Olivicoltura e l'Industria Olearia (OLI), 87036 Rende, Italy; Dipartimento di Farmacia e Scienze della Salute e della Nutrizione, Università della Calabria, Polifunzionale, Arcavacata, 87036 Rende, Italy.
authors.forename: Innocenzo
authors.identifier: 0000-0002-0264-1392
authors.initials: I
authors.lastname: Muzzalupo
mesh_terms: D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D015723:Gene Library; D063990:Gene Ontology; D017343:Genes, Plant; D058977:Molecular Sequence Annotation; D031658:Olea / Q000235:genetics*; D053205:Pollen Tube / Q000235:genetics*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D017423:Sequence Analysis, RNA / Q000379:methods*; D059467:Transcriptome / Q000235:genetics*
chemical_list: D012333:RNA, Messenger