Plant Cell Reports

, 30:1969 | Cite as

Role of HD2 genes in seed germination and early seedling growth in Arabidopsis

  • Adam Colville
  • Reem Alhattab
  • Ming Hu
  • Hélène Labbé
  • Tim Xing
  • Brian MikiEmail author
Original Paper


The Arabidopsis HD2 family of histone deacetylases consist of 4 members (HD2A, HD2B, HD2C, HD2D) that play diverse roles in plant development and physiology through chromatin remodelling. Here, we show that the transcripts of HD2 family members selectively accumulate in response to glucose through a HXK1-independent signal transduction pathway during the early stages of seedling growth. Germination was enhanced in hd2a null mutants relative to wild-type seeds. In contrast, hd2c mutants were restrained in germination relative to wild-type seeds. In hd2a/hd2c double mutants, germination was restored to wild-type levels. The data suggests that HD2A and HD2C may have different and opposing functions in germination with the glucose/HD2A pathway acting to restrain germination and the HD2C pathway acting to enhance germination. These pathways may function early in the regulation of seedling germination, independently of the glucose/HXK1/ABA signal transduction pathway, to fine tune the onset of germination.


Arabidopsis Germination gin2-1 Glucose HD2 Histone deacetylase mutants 



The research was supported by an NSERC Discovery Grant to BM and by Agriculture and Agri-Food Canada.


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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Adam Colville
    • 1
    • 3
  • Reem Alhattab
    • 1
  • Ming Hu
    • 2
  • Hélène Labbé
    • 2
  • Tim Xing
    • 1
  • Brian Miki
    • 2
    Email author
  1. 1.Department of BiologyCarleton UniversityOttawaCanada
  2. 2.Eastern Cereal and Oilseeds Research Centre, Research Branch, Agriculture and Agri-Food CanadaOttawaCanada
  3. 3.Iogen CorporationOttawaCanada

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