Somatic Embryogenesis in Eucalyptus grandis and E. dunni

  • M. P. Watt
  • F. C. Blakeway
  • R. Termignoni
  • S. M. Jain
Part of the Forestry Sciences book series (FOSC, volume 59)


The genus Eucalyptus belongs to the family Myrtaceae, subgroup Leptospermoideae. There are 450–700 eucalyptus species and varieties, varying in size from large broad-leafed trees to shrub-like mallees. The most distinguishing taxonomic feature of the genus is the presence of a fused calyx and/or corolla into an operculum. E. grandis and E. dunni are quite similar in terms of gross morphological features. In E. grandis the operculum is hemispherical, the inflorescence is an umbel, the peduncle is distinctly flattened and the fruit capsule is 5–11 mm in diameter. The leaves are smooth, the adaxial surface is darker than the abaxial one and the mature leaves are lanceolate, often falcate. The annual bark exfoliations are long and fibrous. In E. dunnii (Dunn’s white gum), the operculum is also hemispherical, the inflorescence is simple, the peduncle is flattened and the fruit is 5–8 mm in diameter. The leaves of the adult plants are green, concolorlous, lanceolate to narrow lanceolate. The bark is rough, brownish, flaky and more or less corky at the base, commonly with long ribbons of decorticating bark hanging from branches.


Somatic Embryo Somatic Embryogenesis Cell Suspension Culture Leaf Explants Embryogenic Cell 
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Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • M. P. Watt
    • 1
  • F. C. Blakeway
    • 2
  • R. Termignoni
    • 3
  • S. M. Jain
    • 4
  1. 1.Biology DepartmentUniversity of NatalDurbanSouth Africa
  2. 2.Mondi ForestsHiltonSouth Africa
  3. 3.Dep. de Botanica e Centro de Biotecnologia do Estado do SulUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
  4. 4.Department of Plant ProductionUniversity of HelsinkiHelsinkiFinland

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