title: Modification of AtGRDP1 gene expression affects silique and seed development in Arabidopsis thaliana.
abstract: Glycine Rich Proteins (GRPs) are induced at different developmental stages and in specific plant tissues. Recently, we described a novel Arabidopsis gene encoding a short glycine-rich domain protein (AtGRDP1). This gene is involved in abiotic stress responsiveness; the Atgrdp1-null mutant seeds were more sensitive to stress, while the opposite phenotype was achieved by AtGRDP1 overexpression. In this study, we analyzed the phenotype of the fruits produced by Arabidopsis Atgrdp1 mutants and 35S::AtGRDP1 overexpression lines. Our analyses revealed important changes in silique length, seed number, seed weight and morphology in the analyzed lines. In particular, Atgrdp1 mutant lines exhibited several defects including short siliques, a diminished number of seeds per silique, and a reduction in seed size and weight as compared to Col-0. The overexpression of the AtGRDP1 gene also generated phenotypes with alterations in size of silique, number of seeds per silique, and size and weight of the seed. In addition, the expression analysis of AtGRDP1 gene showed that it was expressed in floral and fruit organs, with the highest expression level in mature siliques. The alterations in the siliques and seeds traits in the Atgrdp1 mutant line, as well as the phenotypes observed in AtGRDP1 overexpression lines, suggest a role of the AtGRDP1 gene in the Arabidopsis fruit development.
authors.affiliation: División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica AC, Camino a la Presa de San José 2055, C.P. 78216, San Luis Potosí, SLP, Mexico.
authors.forename: Aída Araceli
authors.initials: AA
authors.lastname: Rodríguez-Hernández
authors.affiliation: División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica AC, Camino a la Presa de San José 2055, C.P. 78216, San Luis Potosí, SLP, Mexico.
authors.forename: Carlos Vladimir
authors.initials: CV
authors.lastname: Muro-Medina
authors.affiliation: División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica AC, Camino a la Presa de San José 2055, C.P. 78216, San Luis Potosí, SLP, Mexico.
authors.forename: Jocelin Itzel
authors.initials: JI
authors.lastname: Ramírez-Alonso
authors.affiliation: División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica AC, Camino a la Presa de San José 2055, C.P. 78216, San Luis Potosí, SLP, Mexico. Electronic address: jbremont@ipicyt.edu.mx.
authors.forename: Juan Francisco
authors.initials: JF
authors.lastname: Jiménez-Bremont
mesh_terms: D000222:Adaptation, Physiological; D017360:Arabidopsis / Q000033:anatomy & histology / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000235:genetics* / Q000378:metabolism; D005638:Fruit / Q000033:anatomy & histology / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D009154:Mutation; D009928:Organ Specificity; D010641:Phenotype; D020033:Protein Isoforms / Q000235:genetics / Q000378:metabolism; D019655:Quantitative Trait, Heritable; D012639:Seeds / Q000033:anatomy & histology / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D013312:Stress, Physiological
chemical_list: D029681:Arabidopsis Proteins; D020033:Protein Isoforms
keywords: AtGRDP1; Glycine-rich domain protein; Seeds; Siliques