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Dr. Alexandra Kellner

research associate until November 2012




Research interests

  • Glacial refugia and range expansion in the genus Rosa (Rosaceae)
  • Hybridisation between the native and invasive rose species
  • Leaf architecture of recent and fossil roses
  • Convergent evolution in Lithops (Aizoaceae)

Scientific career

  • 2000 - 2007:   Studies in Biology, Friedrich-Schiller-University Jena, Germany
  • 2006:   Diploma (MSc) Biology: „Molecular systematic study of the phylogeny of the genus Lithops N. E. Br. (Aizoaceae)“, Institute of Systematic Botany, Friedrich-Schiller-University Jena, Germany
  • 2007:   Ph. D. student at the Institute of Botany, Systematic Botany group, Justus Liebig University Giessen, Germany
  • since 11/2009:   Parental leave
  • 02/2011 - 11/2012:   Finishing of dissertation


  • Kellner, A., Ritz, C.M. and Wissemann, V. (submitted) Low genetic and morphological differentiation in the european species complex of Rosa sherardii, R. mollis and R. villosa (Rosa, sect. Caninae, subsect. Vestitae). Botanical Journal of the Linnean Society
  • Kellner, A., Ritz, C.M. and Wissemann, V. (2012) Hybridization by invasive Rosa rugosa Thunb. threatens the genetic integrity of native Rosa mollis Sm. Botanical Journal of the Linnean Society 170: 472-484.
  • Föller, J., Kellner, A. und Wissemann, V. (2012). Die Schöne und das Biest - Differentielle Salztoleranz als eine mögliche Ursache evolutionären Erfolgs der sympatrischen Rosa rugosa Thunb. und Rosa mollis Sm. Kieler Notizen zur Pflanzenkunde 38: 68-77.
  • Kellner, A.; Benner, M.; Walther, H.; Kunzmann, L.; Wissemann, V.; Ritz, C.M. (2012):
    Leaf architecture within the genus Rosa L. (Rosaceae) and its impact on the identification of the next living relative of the paleogenic Rosa lignitum Heer. International Journal of Plant Sciences 173(3): 239-250.
  • Kellner, A.; Ritz, C.M.; Schlittenhardt, P.; Hellwig, F. H. (2011). Genetic differentiation in the genus Lithops L. (Ruschioideae, Aizoaceae) reveals a high level of convergent evolution and reflects geographic distribution. Plant Biol. 13(2): 368-380.

Scientific memberships

  • German Botanical Society (DBG)

Teaching experience

  • Supervision of undergraduate students
  • Practical courses in Botany (K2Bex, V-BO-DIP, M-BO-BFS)