title: Comparative proteomic analysis of off-type and normal phenotype somatic plantlets derived from somatic embryos of Feijoa (Acca sellowiana (O. Berg) Burret).
abstract: Morphological disorders in a relevant portion of emerged somatic embryos have been a limiting factor in the true-to-type plantlet formation in Acca sellowiana. In this sense, the present study undertook a comparison between normal phenotype and off-type somatic plantlets protein profiles by means of the 2-D DIGE proteomics approach. Off-type and normal phenotype somatic plantlets obtained at 10 and 20 days conversion were evaluated. Results indicated 12 exclusive spots between normal and off-type plantlets at 10 days conversion, and 17 exclusive spots at 20 days conversion. Also at 20 days conversion, 4 spots were differentially expressed, up- or down-regulated. Two proteins related to carbohydrate metabolism were only expressed in off-types at 10 days conversion, suggesting a more active respiratory pathway. A vicilin-like storage protein was only found in off-types at 20 days conversion, indicating that plantlets may present an abnormality in the mobilization of storage compounds, causing reduced vigor in the development of derived plantlets. The presence of heat shock proteins were only observed during formation of normal phenotype somatic plantlets, indicating that these proteins may be involved in normal morphogenesis of plantlets formed. These new findings shed light on possible genetic or epigenetic mechanisms governing A. sellowiana morphogenesis.
authors.affiliation: Graduate Program in Plant Genetic Resources, Plant Developmental Physiology and Genetics Laboratory, Federal University of Santa Catarina, Rodovia Admar Gonzaga, 1346, ZC: 88040-900 Florianópolis, Santa Catarina, Brazil.
authors.forename: Hugo Pacheco de Freitas
authors.initials: HP
authors.lastname: Fraga
authors.forename: Sarah Zanon
authors.initials: SZ
authors.lastname: Agapito-Tenfen
authors.forename: Clarissa Alves
authors.initials: CA
authors.lastname: Caprestano
authors.forename: Rubens Onofre
authors.initials: RO
authors.lastname: Nodari
authors.forename: Miguel Pedro
authors.initials: MP
authors.lastname: Guerra
mesh_terms: D031646:Feijoa / Q000033:anatomy & histology / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D006360:Heat-Shock Proteins / Q000032:analysis / Q000378:metabolism; D010641:Phenotype; D010940:Plant Proteins / Q000032:analysis* / Q000378:metabolism; D058439:Plant Somatic Embryogenesis Techniques; D040901:Proteomics; D055314:Seed Storage Proteins / Q000032:analysis / Q000378:metabolism; D053719:Tandem Mass Spectrometry; D057825:Two-Dimensional Difference Gel Electrophoresis
chemical_list: D006360:Heat-Shock Proteins; D010940:Plant Proteins; D055314:Seed Storage Proteins; C100817:vicilin-like protein, plant
keywords: 2,4-D; 2,4-dichlorophenoxyacetic acid; 3-phosphoglycerate kinase; 6-benzylaminepurine; 70kDa heat shock proteins family; Abnormal development; Acca sellowiana; BAP; DIGE; GAPDH; Hsp70s; PGK; Proteomics; RITA; SE; Somatic embryogenesis; Two-dimensional gel electrophoresis; fluorescence difference gel electrophoresis; glyceraldehyde-3-phosphate dehydrogenase C1; recipient for automated temporary immersion; somatic embryogenesis