Plant Cell Reports

, Volume 32, Issue 3, pp 339–348 | Cite as

Identification of genes preferentially expressed in wheat egg cells and zygotes

  • Mónika Domoki
  • Attila Szűcs
  • Katalin Jäger
  • Sándor Bottka
  • Beáta Barnabás
  • Attila Fehér
Original Paper

Abstract

Key message

Wheat genes differentially expressed in the egg cell before and after fertilization were identified. The data support zygotic gene activation before the first cell division in wheat.

Abstract

To have an insight into fertilization-induced gene expression, cDNA libraries have been prepared from isolated wheat egg cells and one-celled zygotes. Two-hundred and twenty-six egg cell and 253 zygote-expressed EST sequences were determined. Most of the represented transcripts were detected in the wheat egg cell or zygote transcriptome at the first time. Expression analysis of fourteen of the identified genes and three controls was carried out by real-time quantitative PCR. The preferential expression of all investigated genes in the female gametophyte-derived samples (egg cells, zygotes, two-celled proembryos, and basal ovule parts with synergids) in comparison to the anthers, and the leaves were verified. Three genes with putative signaling/regulatory functions were expressed at a low level in the egg cell but exhibited increased (2-to-33-fold) relative expression in the zygote and the proembryo. Genes with high EST abundance in cDNA libraries exhibited strong expression in the egg cell and the zygote, while the ones coding for unknown or hypothetical proteins exhibited differential expression patterns with preferential transcript accumulation in egg cells and/or zygotes. The obtained data support the activation of the zygotic genome before the first cell division in wheat.

Keywords

EST sequencing Expressed sequence tag Female gametophyte Fertilization Gene expression Plant Proembryo Real-time quantitative PCR Triticum aestivum L. 

Notes

Acknowledgments

The presented work was supported by grants (K-67987 and K-68064) of the Hungarian Scientific Research Fund.

Supplementary material

299_2012_1367_MOESM1_ESM.doc (50 kb)
Supplementary material 1 (DOC 50 kb)
299_2012_1367_MOESM2_ESM.xls (72 kb)
Supplementary material 2 (XLS 72 kb)
299_2012_1367_MOESM3_ESM.xls (74 kb)
Supplementary material 3 (XLS 73 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Mónika Domoki
    • 1
  • Attila Szűcs
    • 1
  • Katalin Jäger
    • 2
  • Sándor Bottka
    • 1
  • Beáta Barnabás
    • 2
  • Attila Fehér
    • 1
  1. 1.Biological Research Centre, Institute of Plant BiologyHungarian Academy of SciencesSzegedHungary
  2. 2.Centre for Agricultural Research, Agricultural InstituteHungarian Academy of SciencesMartonvásárHungary

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