Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/9040
Título: Epigenetic marks in the mature pollen of Quercus suber L. (Fagaceae)
Autor: Ribeiro, Teresa
Viegas, Wanda
Morais-Cecílio, Leonor
Palavras-chave: epigenetic marks
vegetative nucleus
generative nucleus
delayed fertilization
Data: 2009
Editora: Springer
Citação: "Sexual Plant Reproduction". ISSN 0934-0882. 22 (2009) 1-7
Resumo: We have analysed the distribution of epigenetic marks for histone modifications at lysine residues H3 and H4, and DNA methylation, in the nuclei of mature pollen cells of the Angiosperm tree Quercus suber; a monoecious wind pollinated species with a protandrous system, and a long post-pollination period. The ultrasonic treatment developed for the isolation of pollen nuclei proved to be a fast and reliable method, preventing the interference of cell wall autofluorescence in the in situ immunolabelling assays. In contrast with previous studies on herbaceous species with short progamic phases, our results are consistent with a high level of silent (5-mC and H3K9me2) epigenetic marks on chromatin of the generative nucleus, and the prevalence of active marks (H3K9me3 and H4Kac) in the vegetative nucleus. The findings are discussed in terms of the pollination/fertilization timing strategy adopted by this plant species
Peer review: yes
URI: http://hdl.handle.net/10400.5/9040
DOI: 10.1007/s00497-008-0083-y
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