Flow Cytometry Estimation of Nuclear Size and Ploidy Level of Habituated Calli of Sugar Beet |
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Authors: | C Kevers R Greimers T Franck B Bisbis J Dommes T Gaspar |
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Institution: | (1) Laboratoire d';Hormonologie Végétale, Institute of Botany, University of Liège, Sart Tilman, B-4000 Liège, Belgium;(2) Laboratoire d'Anatomie Pathologique, Institute of Pathology, University of Liège, Sart Tilman, B-4000 Liège, Belgium;(3) Laboratoire d'Hormonologie Végétale, Institute of Botany, University of Liège, Sart Tilman, B-4000 Liège, Belgium |
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Abstract: | 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.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | aneuploidy Beta vulgaris habituation |
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