Changes in the 2-DE protein profile during zygotic embryogenesis in the Brazilian Pine (Araucaria angustifolia).
Araucaria angustifolia is the only native conifer of economic importance in the Brazilian Atlantic Rainforest. Due to a clear-cutting form of exploitation this species has received the status of vulnerable. The aim of this work was to investigate and characterize changes in protein expression profile during seed development of this endangered species. For this, the proteome of developing seeds was characterized by 2-DE and LC-MS/MS. Ninety six proteins were confidently identified and classified according to their biological function and expression profile. Overaccumulated proteins in early seed development indicated a higher control on oxidative stress metabolism during this phase. In contrast, highly expressed proteins in late stages revealed an active metabolism, leading to carbon assimilation and storage compounds accumulation. Comprehensive protein expression profiles and identification of overaccumulated proteins provide new insights into the process of embryogenesis in this recalcitrant species. Considerations on the improvement and control of somatic embryogenesis through medium manipulation and protein markers screening using data generated are also discussed.
Plant Cell Biology Laboratory, Institute of Biosciences, University of São Paulo, São Paulo, Brazil. tsbalbuena@usp.br
Tiago S
TS
Balbuena
Vanildo
V
Silveira
Magno
M
Junqueira
Leonardo L C
LL
Dias
Claudete
C
Santa-Catarina
Andrej
A
Shevchenko
Eny I S
EI
Floh
D001938:Brazil; D015180:Electrophoresis, Gel, Two-Dimensional; D006863:Hydrogen-Ion Concentration; D028223:Pinus / Q000196:embryology* / Q000378:metabolism*; D010940:Plant Proteins / Q000737:chemistry / Q000145:classification / Q000378:metabolism; D040901:Proteomics; D012639:Seeds / Q000737:chemistry / Q000254:growth & development / Q000378:metabolism; D053719:Tandem Mass Spectrometry
D010940:Plant Proteins