Epigenetic repressor-like genes are differentially regulated during grapevine (Vitis vinifera L.) development |
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Authors: | Rub??n Almada Nuri Cabrera Jos?? A Casaretto Hugo Pe?a-Cort??s Sim??n Ruiz-Lara Enrique Gonz??lez Villanueva |
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Institution: | (1) Instituto de Biolog?a Vegetal y Biotecnolog?a, Universidad de Talca, Talca, Chile;(2) Centro de Estudios Avanzados en Fruticultura, Instituto de Investigaciones Agropecuarias, CRI-Rayentu?, Av. Salamanca s/n, Sector Los Choapinos, Rengo, Chile;(3) Centro de Biotecnolog?a, Universidad T?cnica Federico Santa Mar?a, Valpara?so, Chile |
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Abstract: | Grapevine sexual reproduction involves a seasonal separation between inflorescence primordia (flowering induction) and flower
development. We hypothesized that a repression mechanism implicating epigenetic changes could play a role in the seasonal
separation of these two developmental processes in grapevine. Therefore, the expression of five grapevine genes with homology
to the Arabidopsis epigenetic repressor genes FERTILIZATION INDEPENDENT ENDOSPERM (FIE), EMBRYONIC FLOWER 2 (EMF2), CURLY LEAF (CLF), MULTICOPY SUPPRESSOR OF IRA 1 (MSI1) and SWINGER (SWN) was analyzed during the development of buds and vegetative and reproductive organs. During bud development, the putative
grapevine epigenetic repressor genes VvCLF, VvEMF2, VvMSI1, VvSWN and VvFIE are mainly expressed in latent buds at the flowering induction period, but also detected during bud burst and inflorescence/flower
development. The overlapping expression patterns of grapevine PcG-like genes in buds suggest that chromatin remodeling mechanisms could be operating during grapevine bud development for controlling
processes such as seasonal flowering, dormancy and bud burst. Furthermore, the expression of grapevine PcG-like genes was also detected in fruits and vegetative organs, suggesting that epigenetic changes could be at the basis of
the regulation of various proliferation–differentiation cell transitions that occur during grapevine development. |
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