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Cloning and characterization of six embryogenesis-associated cDNAs from somatic embryos of Picea glauca and their comparative expression during zygotic embryogenesis

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Abstract

Six somatic embryogenesis-associated cDNAs (PgEMB2, 6, 7, 8, 24 and 34) from white spruce (Picea glauca (Moench) Voss) somatic embryos have been characterized. Transcript accumulation during somatic embryo development and subsequent germination related to these genes, indicated that they were developmentally regulated. The transcripts related to clones PgEMB2, 6, 24 and 34 were also detected during zygotic embryo development, but transcripts of clones PgEMB7 and 8 were not. PgEMB24 had a similar gene expression pattern to spruce Em-like late embryo abundant (lea) gene, but other clones had no similarities in gene expression to either spruce lea-like or storage protein genes. Abscisic acid, a stimulator for spruce somatic embryo maturation, did not obviously affect gene expression corresponding to these cDNAs. The predicted proteins are distinguishable from known LEA proteins based on analyses of hydropathy plots, amino acid compositions and deduced protein structures. The similarities of the spruce cDNAs, and protein sequences predicted from these cDNAs, to other sequence data are described.

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Author notes

  1. Jin-Zhuo Dong

    Present address: Monsanto Company, University Green, Agracetus Campus, 8520, Middleton, WI, 53562, USA

Authors and Affiliations

  1. Crop Science Department, East Malling, West Malling, Horticulture Research International, Kent, ME19 6BJ, UK

    David I. Dunstan

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  1. Jin-Zhuo Dong
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  2. David I. Dunstan
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Dong, JZ., Dunstan, D.I. Cloning and characterization of six embryogenesis-associated cDNAs from somatic embryos of Picea glauca and their comparative expression during zygotic embryogenesis. Plant Mol Biol 39, 859–864 (1999). https://doi.org/10.1023/A:1006146622614

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