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Arabidopsis female gametophyte gene expression map reveals similarities between plant and animal gametes.

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Wuest Samuel E, Vijverberg Kitty, Schmidt Anja, Weiss Manuel, Gheyselinck Jacqueline, Lohr Miriam, Wellmer Frank, Rahnenführer Jörg, von Mering Christian, Grossniklaus Ueli,
Project The genetic and molecular basis of gametogenesis and maternal effects in arabidopsis
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Original article (peer-reviewed)

Journal Current biology : CB
Volume (Issue) 20(6)
Page(s) 506 - 12
Title of proceedings Current biology : CB
DOI 10.1016/j.cub.2010.01.051

Abstract

The development of multicellular organisms is controlled by differential gene expression whereby cells adopt distinct fates. A spatially resolved view of gene expression allows the elucidation of transcriptional networks that are linked to cellular identity and function. The haploid female gametophyte of flowering plants is a highly reduced organism: at maturity, it often consists of as few as three cell types derived from a common precursor [1, 2]. However, because of its inaccessibility and small size, we know little about the molecular basis of cell specification and differentiation in the female gametophyte. Here we report expression profiles of all cell types in the mature Arabidopsis female gametophyte. Differentially expressed posttranscriptional regulatory modules and metabolic pathways characterize the distinct cell types. Several transcription factor families are overrepresented in the female gametophyte in comparison to other plant tissues, e.g., type I MADS domain, RWP-RK, and reproductive meristem transcription factors. PAZ/Piwi-domain encoding genes are upregulated in the egg, indicating a role of epigenetic regulation through small RNA pathways-a feature paralleled in the germline of animals [3]. A comparison of human and Arabidopsis egg cells for enrichment of functional groups identified several similarities that may represent a consequence of coevolution or ancestral gametic features.
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