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oai:repisalud.isciii.es:20.500.12105/66512024-09-27T10:10:08Zcom_20.500.12105_19604com_20.500.12105_2051col_20.500.12105_19607

00925njm 22002777a 4500 dc Gomez-Garay, Aranzazu author Lopez, Juan Antonio author Camafeita, Emilio author Bueno, Maria Angeles author Pintos, Beatriz author 2013-11-20 UNLABELLED: Quercus suber L. is a forest tree with remarkable ecological, social and economic value in the southern Europe ecosystems. To circumvent the difficulties of breeding such long-lived species like Q. suber in a conventional fashion, clonal propagation of Q. suber elite trees can be carried out, although this process is sometimes unsuccessful. To help decipher the complex program underlying the development of Q. suber somatic embryos from the first early stage until maturity, a proteomic approach based on DIGE and MALDI-MS has been envisaged. Results highlighted several key processes involved in the three developmental stages (proliferative, cotyledonary and mature) of Q. suber somatic embryogenesis studied. Results show that the proliferation stage is characterized by fermentation as an alternative energy source at the first steps of somatic embryo development, as well as by up-regulation of proteins involved in cell division. In this stage reactive oxygen species play a role in proliferation, while other proteins like CAD and PR5 seem to be implied in embryonic competence. In the transition to the cotyledonary stage diverse ROS detoxification enzymes are activated and reserve products (mainly carbohydrates and proteins) are accumulated, whereas energy production is increased probably to participate in the synthesis of primary metabolites such as amino acids and fatty acids. Finally, in the mature stage ethylene accumulation regulates embryo development. BIOLOGICAL SIGNIFICANCE: Quercus suber L. is a forest tree with remarkable ecological, social and economic value in the southern Europe ecosystems. To circumvent the difficulties of breeding such long-lived species like Q. suber in a conventional fashion, clonal propagation of Q. suber elite trees can be carried out, although this process is sometimes unsuccessful. To help decipher the complex program underlying the development of Q. suber somatic embryos from the first early stage until maturity, in deep studies become necessary. This article is part of a Special Issue entitled: Translational Plant Proteomics. J Proteomics. 2013 Nov 20;93:314-25 10.1016/j.jprot.2013.06.006 1876-7737 18743919 Journal of proteomics 23770300 http://hdl.handle.net/20.500.12105/6651 5-Methyltetrahydropteroyltriglutamate–homocysteine methyltransferase AA AFR AKR Aldo keto reductase Ascorbate free radical Ascorbic acid CAD CSE Cinnamyl alcohol dehydrogenase Cotyledonar somatic embryos DHA DIGE Dehydroascorbate (synonym: dehydroascorbic acid) GAPDH Glyceraldehyde-3-phosphate dehydrogenase Heat shock protein Hsp LEA Late embryogenesis abundant MALDI MSE MTHP Mass spectrometry Mature somatic embryos PCA PR protein PSE PTM Pathogenesis-related protein Post-translational modification Principal components analysis Proliferating somatic embryos Proteomics Quercus ROS Reactive oxygen species SOD Somatic embryogenesis Superoxide dismutase Proteomic perspective of Quercus suber somatic embryogenesis