Plant Cell, Tissue and Organ Culture

, Volume 92, Issue 2, pp 207–214 | Cite as

Recovering polyploid papaya in vitro regenerants as screened by flow cytometry

  • Wellington Ronildo Clarindo
  • Carlos Roberto de Carvalho
  • Fernanda Santos Araújo
  • Isabella Santiago de Abreu
  • Wagner Campos Otoni
Original Paper


Several protocols have been proposed for in vitro propagation of papaya, either based on somatic embryogenesis or shoot organogenesis. It is well-known that tissue culture-based approaches are frequently associated with somaclonal variation. Whether on the one hand this phenomenon can preclude further stages of in vitro culture, on the other hand it can generate useful genetic variability for crop improvement. However, somaclonal variation analyses are limited in papaya tissue culture. The DNA ploidy level of 250 papaya somatic embryogenesis-derived plantlets from immature zygotic embryos was analyzed by flow cytometry. In vitro-grown and greenhouse seed-derived plantlets were used as diploid standards. Flow cytometry unambiguously evidenced euploid (diploid, mixoploid, triploid and tetraploid) and aneuploid papaya plantlets, indicating that in vitro culture conditions can lead the occurrence of somaclonal variation. Additionally, the two subsequent flow cytometry analyses showed that the DNA ploidy level remained stable in all cloned papaya plantlets during the successive subcultures in the multiplication medium.


Aneuploid Carica papaya DNA ploidy Euploid Polyploidy Somaclonal variation Somatic embryogenesis Tissue culture 



Abscisic acid




Dichlorophenoxyacetic acid


α-Naphthaleneacetic acid





The authors are grateful to Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Brasília, DF, Brazil) and Caliman Agrícola SA (Linhares, ES, Brazil) for financial support, and Prof. Marcio G.C. Costa for critical reading this manuscript.


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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Wellington Ronildo Clarindo
    • 1
  • Carlos Roberto de Carvalho
    • 1
  • Fernanda Santos Araújo
    • 1
  • Isabella Santiago de Abreu
    • 1
  • Wagner Campos Otoni
    • 2
  1. 1.Laboratório de Citogenética e Citometria, Departamento de Biologia GeralUniversidade Federal de ViçosaVicosaBrazil
  2. 2.Laboratório de Cultura de Tecidos, Departamento de Biologia Vegetal/BIOAGROUniversidade Federal de ViçosaVicosaBrazil

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