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Forests 2017, 8(12), 486; doi:10.3390/f8120486

Comprehensive Analysis of the Cork Oak (Quercus suber) Transcriptome Involved in the Regulation of Bud Sprouting

1
Centro de Biotecnologia Agrícola e Agro-alimentar do Alentejo (CEBAL), Instituto Politécnico de Beja (IPBeja), Rua Pedro Soares, s.n.-Campus IPBeja/ESAB, Apartado 6158, 7801-908 Beja, Portugal
2
Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora, Núcleo da Mitra, Apartado 94, 7006-554 Évora, Portugal
3
Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV), Av. da República, Quinta do Marquês (edifício sede), 2780-157 Oeiras, Portugal
4
Wellcome Trust Sanger Institute, Wellcome Genome Campus Hinxton, Cambridge CB10 1SA, UK
5
Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda 1349-017 Lisboa, Portugal Lisboa, Portugal
6
Centre for Ecology, Evolution and Environmental Changes (cE3c), Faculdade de Ciências da Universidade de Lisboa, Edifício C2, 5° Piso, Sala 2.5.46 Campo Grande, 1749-016 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Received: 7 October 2017 / Revised: 20 November 2017 / Accepted: 29 November 2017 / Published: 6 December 2017
(This article belongs to the Special Issue Genetics and Genomics of Forest Trees)
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Abstract

Cork oaks show a high capacity of bud sprouting as a response to injury, which is important for species survival when dealing with external factors, such as drought or fires. The characterization of the cork oak transcriptome involved in the different stages of bud sprouting is essential to understanding the mechanisms involved in these processes. In this study, the transcriptional profile of different stages of bud sprouting, namely (1) dormant bud and (2) bud swollen, vs. (3) red bud and (4) open bud, was analyzed in trees growing under natural conditions. The transcriptome analysis indicated the involvement of genes related with energy production (linking the TCA (tricarboxylic acid) cycle and the electron transport system), hormonal regulation, water status, and synthesis of polysaccharides. These results pinpoint the different mechanisms involved in the early and later stages of bud sprouting. Furthermore, some genes, which are involved in bud development and conserved between species, were also identified at the transcriptional level. This study provides the first set of results that will be useful for the discovery of genes related with the mechanisms regulating bud sprouting in cork oak. View Full-Text
Keywords: cork oak; transcriptome; bud development; gene expression cork oak; transcriptome; bud development; gene expression
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MDPI and ACS Style

Usié, A.; Simões, F.; Barbosa, P.; Meireles, B.; Chaves, I.; Gonçalves, S.; Folgado, A.; Almeida, M.H.; Matos, J.; Ramos, A.M. Comprehensive Analysis of the Cork Oak (Quercus suber) Transcriptome Involved in the Regulation of Bud Sprouting. Forests 2017, 8, 486.

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