Plant Cell Reports

, Volume 32, Issue 3, pp 359–368 | Cite as

Variations in genomic DNA methylation during the long-term in vitro proliferation of oil palm embryogenic suspension cultures

  • Alain Rival
  • Pascal Ilbert
  • Axel Labeyrie
  • Esperanza Torres
  • Sylvie Doulbeau
  • Aline Personne
  • Stéphane Dussert
  • Thierry Beulé
  • Tristan Durand-Gasselin
  • James W. Tregear
  • Estelle Jaligot
Original Paper

Abstract

Key message

The long-term proliferation of embryogenic cell suspensions of oil palm is associated with changes in both genomic methylation rates and embryogenic capacities.

Abstract

In the aim of exploring the relationship between epigenetic stability and the long-term in vitro proliferation of plant tissues, we have studied changes in genomic DNA methylation levels in embryogenic suspensions of oil palm (Elaeis guineensis Jacq.). Five embryogenic callus lines were obtained from selected hybrid seeds and then proliferated as suspension cultures. Each clonal line obtained from a single genotype was subdivided into three independent subclonal lines. Once established, cultures proliferated for 12 months and genomic DNA was sampled at 4 months intervals for the estimation of global DNA methylation rates through high performance liquid chromatography (HPLC) quantitation of deoxynucleosides. Our results show that in vitro proliferation induces DNA hypermethylation in a time-dependent fashion. Moreover, this trend is statistically significant in several clonal lines and shared between subclonal lines originating from the same genotype. Interestingly, the only clonal line undergoing loss of genomic methylation in the course of proliferation has been found unable to generate somatic embryos. We discuss the possible implications of genome-wide DNA methylation changes in proliferating cells with a view to the maintenance of genomic and epigenomic stability.

Keywords

Arecaceae DNA methylation Elaeis guineensis Epigenetic stability Somaclonal variation Somatic embryogenesis 

Abbreviations

2,4-D

2,4-Dichlorophenoxyacetic acid

5mdC

5-Methyldeoxycytidine

dC

Deoxycytidine

FW

Fresh Weight

Gb

Gigabases

GMR

Global Methylation Rate

HPLC

High Performance Liquid Chromatography

PEM

Pro-Embryogenic Mass

PGR

Plant Growth Regulator

TE

Transposable Element

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Alain Rival
    • 1
  • Pascal Ilbert
    • 1
  • Axel Labeyrie
    • 2
    • 5
  • Esperanza Torres
    • 3
  • Sylvie Doulbeau
    • 4
  • Aline Personne
    • 1
  • Stéphane Dussert
    • 4
  • Thierry Beulé
    • 1
  • Tristan Durand-Gasselin
    • 2
  • James W. Tregear
    • 4
  • Estelle Jaligot
    • 1
  1. 1.CIRADUMR DIADE (IRD, UMSF)MontpellierFrance
  2. 2.PalmElit SASMontferrier sur LezFrance
  3. 3.Universidad Nacional de ColombiaBogotá DCColombia
  4. 4.IRDUMR DIADE (IRD, UMSF)MontpellierFrance
  5. 5.CIRADUMR AGAPMontpellierFrance

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