title: Differential proteomic analysis during the vegetative phase change and the floral transition in Malus domestica.
abstract: In order to identify the proteomic changes of apple (Malus domestica Borkh.) during the vegetative phase change and the floral transition, leaf protein of juvenile, adult vegetative and reproductive phase in a seedling ('Jonathan' × 'Golden Delicious') was extracted and analyzed by 2-D electrophoresis and Matrix-assisted laser desorption/ionization-time of flight mass spectrometry. Seventy two gel spots with significant expression differences between ontogenetic phases were obtained. Five protein spots were only detected in leaves of juvenile phase and 11 were not; 17 spots were found exclusively in adult vegetative leaves; and only one spot solely appeared in reproductive leaves while 12 did not. Twenty six of the differentially expressed proteins identified were involved in photosynthesis. Seven enzymes were related to respiration and carbohydrate metabolism. Fifteen other proteins also presented qualitative or quantitative differences among developmental phases. The spatial distribution of one differentially expressed protein, serine hydroxymethyltransferase, was confirmed by enzyme linked immunosorbent assay and immunohistochemistry. These results strongly support the idea that the vegetative phase change and the floral transition are regulated independently during developmental process.
authors.affiliation: Changli Institute of Pomology, Hebei Academy of Agricultural and Forestry Sciences, Changli 066600, China.
authors.forename: Guang J
authors.initials: GJ
authors.lastname: Zeng
authors.forename: Chun M
authors.initials: CM
authors.lastname: Li
authors.forename: Xin Z
authors.initials: XZ
authors.lastname: Zhang
authors.forename: Zhen H
authors.initials: ZH
authors.lastname: Han
authors.forename: Feng Q
authors.initials: FQ
authors.lastname: Yang
authors.forename: Yan
authors.initials: Y
authors.lastname: Gao
authors.forename: Dong M
authors.initials: DM
authors.lastname: Chen
authors.forename: Yong B
authors.initials: YB
authors.lastname: Zhao
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
authors.forename: Yun L
authors.initials: YL
authors.lastname: Teng
authors.forename: Wen X
authors.initials: WX
authors.lastname: Dong
mesh_terms: D035264:Flowers / Q000254:growth & development / Q000502:physiology*; D027845:Malus / Q000254:growth & development* / Q000378:metabolism*; D018515:Plant Leaves / Q000254:growth & development / Q000502:physiology; D010940:Plant Proteins / Q000032:analysis* / Q000235:genetics / Q000378:metabolism; D020543:Proteome / Q000032:analysis* / Q000235:genetics / Q000378:metabolism; D040901:Proteomics
chemical_list: D010940:Plant Proteins; D020543:Proteome