title: Molecular analysis of endo-β-mannanase genes upon seed imbibition suggest a cross-talk between radicle and micropylar endosperm during germination of Arabidopsis thaliana.
abstract: The endo-β-mannanase (MAN) family is represented in the Arabidopsis genome by eight members, all with canonical signal peptides and only half of them being expressed in germinating seeds. The transcripts of these genes were localized in the radicle and micropylar endosperm (ME) before radicle protrusion and this expression disappears as soon as the endosperm is broken by the emerging radicle tip. However, only three of these MAN genes, AtMAN5, AtMAN7 and especially AtMAN6 influence the germination time (t50) as assessed by the analysis of the corresponding knock-out lines. The data suggest a possible interaction between embryo and ME regarding the role of MAN during the Arabidopsis germination process.
authors.affiliation: Departamento de Fisiología Vegetal, Facultad de Farmacia, Universidad de Santiago de Compostela, Santiago de Compostela, Spain.
authors.forename: Raquel
authors.initials: R
authors.lastname: Iglesias-Fernández
authors.forename: María del Carmen
authors.initials: Mdel C
authors.lastname: Rodríguez-Gacio
authors.forename: Cristina
authors.initials: C
authors.lastname: Barrero-Sicilia
authors.forename: Pilar
authors.initials: P
authors.lastname: Carbonero
authors.forename: Angel J
authors.initials: AJ
authors.lastname: Matilla
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000254:growth & development*; D004269:DNA, Bacterial / Q000235:genetics; D056625:Endosperm / Q000235:genetics*; D017343:Genes, Plant / Q000235:genetics*; D018525:Germination / Q000235:genetics*; D008351:Mannans / Q000378:metabolism; D008954:Models, Biological; D013997:Time Factors; D044902:beta-Mannosidase / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial; D008351:Mannans; C036483:T-DNA; D044902:beta-Mannosidase