Embryogenic and non-embryogenic cell lines of Daucus carota cloned from meristematic cell clusters: relation with cell ploidy determined by flow cytometry |
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Authors: | Pierre Coutos-Thevenot Jean Pierre Jouanneau Spencer Brown Vincent Petiard Jean Guern |
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Institution: | (1) Laboratoire de Physiologie Cellulaire Végétale, CNRS, F-91198 Gif sur Yvette, Cedex, France;(2) Service de Cytométrie, CNRS, F-91198 Gif sur Yvette, Cedex, France;(3) Francereco, BP 0166, F-37001 Tours Cedex, France |
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Abstract: | The presence of totipotent and non-totipotent cells in embryogenic carrot cell suspension cultures was examined by cloning of cell microclusters. Forty clones were isolated and the distribution of their embryogenic potential was studied. Nonembryogenic, weakly and highly embryogenic cell lines were selected. After one year of subculture a second cloning round showed that the highly embryogenic and the non-embryogenic cell lines were homogenous and stable. A measurement of ploidy levels of clones by flow cytometry showed that the embryogenic clones were all diploid whereas the non-embryogenic were diploid or tetraploid. Hence, for our strain, there was a strict relationship between the tetraploid state and the inability to produce somatic embryos.Abbreviations 2,4-D
2,4-dichlorophenoxyacetic acid
- PCV
packed cell volume
- MS
Murashige and Skoog medium
- MES
2(N-morpholino) ethanesulfonic acid
- a.u.
arbitrary units |
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