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Phytochemistry 2011-Apr

Differential proteome analysis of mature and germinated embryos of Araucaria angustifolia.

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Tiago S Balbuena
Leonardo Jo
Fernanda P Pieruzzi
Leonardo L C Dias
Vanildo Silveira
Claudete Santa-Catarina
Magno Junqueira
Jay J Thelen
Andrej Shevchenko
Eny I S Floh

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概要

Araucaria angustifolia is an endangered Brazilian native conifer tree. The aim of the present work was to identify differentially expressed proteins between mature and germinated embryos of A. angustifolia, using one and two dimensional gel electrophoresis approaches followed by protein identification by tandem mass spectrometry. The identities of 32 differentially expressed protein spots from two dimensional gel maps were successfully determined, including proteins and enzymes involved in storage mobilization such as the vicilin-like storage protein and proteases. A label free approach, based on spectral counts, resulted in detection of 10 and 14 mature and germinated enriched proteins, respectively. Identified proteins were mainly related to energetic metabolism pathways, translational processes, oxidative stress regulation and cellular signaling. The integrated use of both strategies permitted a comprehensive protein expression overview of changes in germinated embryos in relation to matures, providing insights into the this process in a recalcitrant seed species. Applications of the data generated on the monitoring and control of in vitro somatic embryos were discussed.

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