biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 42:321-332, 1999 | DOI: 10.1023/A:1002469331895

Flow Cytometry Estimation of Nuclear Size and Ploidy Level of Habituated Calli of Sugar Beet

C. Kevers1, R. Greimers2, T. Franck1, B. Bisbis1, J. Dommes1, T. Gaspar3
1 Laboratoire d';Hormonologie Végétale, Institute of Botany, University of Liège, Liège, Belgium
2 Laboratoire d'Anatomie Pathologique, Institute of Pathology, University of Liège, Sart Tilman, Liège, Belgium
3 Laboratoire d'Hormonologie Végétale, Institute of Botany, University of Liège, Liège, Belgium

A fully habituated (auxin- and cytokinin-independent) self-regenerating (organo-genic) sugar beet cell line (HO) and a fully habituated non-organogenic one (HNO) derived from the former one, were analyzed as to their nuclear size and DNA content. Flow cytometry and image analysis were used and cells of certified diploid leaves of the same sugar beet strain served as controls. The HNO cells had been shown previously to have many characteristics of cancerous cells. The analyses made on leaves and HNO cells indicated the presence of only one population of cycling cells. In HO cells, two cycling populations were detected: the first one had the same DNA content as the leaves while the second one contained two fold more DNA than the first population. HNO cells showed the higher nuclear size and DNA content. HNO cells also showed evidence of aneuploidy. Thus, nuclear size, DNA content and ploidy level increase together with the neoplasic progression to culminate in HNO cells with the loss of organogenic totipotency.

Keywords: aneuploidy; Beta vulgaris; habituation
Subjects: aneuploidy, sugar beet; Beta vulgaris; callus culture, fully habituated calli; flow cytometry; habituation, callus culture; nuclear size, estimation; ploidy level, sugar beet

Published: November 1, 1999  Show citation

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Kevers, C., Greimers, R., Franck, T., Bisbis, B., Dommes, J., & Gaspar, T. (1999). Flow Cytometry Estimation of Nuclear Size and Ploidy Level of Habituated Calli of Sugar Beet. Biologia plantarum, 42(3), 321-332. doi: 10.1023/A:1002469331895
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