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Maternal and paternal genomes contribute equally to the transcriptome of early plant embryos.

Abstract：

:In animals, maternal gene products deposited into eggs regulate embryonic development before activation of the zygotic genome. In plants, an analogous period of prolonged maternal control over embryogenesis is thought to occur based on some gene-expression studies. However, other gene-expression studies and genetic analyses show that some transcripts must derive from the early zygotic genome, implying that the prevailing model does not fully explain the nature of zygotic genome activation in plants. To determine the maternal, paternal and zygotic contributions to the early embryonic transcriptome, we sequenced the transcripts of hybrid embryos from crosses between two polymorphic inbred lines of Arabidopsis thaliana and used single-nucleotide polymorphisms diagnostic of each parental line to quantify parental contributions. Although some transcripts seemed to be either inherited from primarily one parent or transcribed from imprinted loci, the vast majority of transcripts were produced in near-equal amounts from both maternal and paternal alleles, even during the initial stages of embryogenesis. Results of reporter experiments and analyses of transcripts from genes that are not expressed in sperm and egg indicate early and widespread zygotic transcription. Thus, in contrast to early animal embryogenesis, early plant embryogenesis is mostly under zygotic control.

journal_name

Nature

journal_title

Nature

authors

Nodine MD,Bartel DP

doi

10.1038/nature10756

subject

Has Abstract

pub_date

2012-01-22 00:00:00

pages

94-7

issue

7383

eissn

0028-0836

issn

1476-4687

pii

nature10756

journal_volume

482

pub_type

杂志文章

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