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DNA heterogeneity and genetic control of tumorigenesis in nicotiana tumorous and nontumorous genotypes by Mauro Durante; Chiara Geri; Marcello Buiatti; Sergio Baroncelli; Roberto Parenti; Vittoria Nuti Ronchi; Guido Martini; Fulvio Collina Grenci; Janine Grisvard; Etienne Guillé is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.
What is DNA heterogeneity and genetic control of tumorigenesis in nicotiana tumorous and nontumorous genotypes about?
## Abstract The possible relevance of changes in amounts of highly repetitive DNA sequences for plant differentiation and dedifferentiation processes has been suggested in several cases. Data are lacking however on (1) the genetic control of these phenomena and (2) cause‐effect relationships between DNA amplification and specific ontogenetic patterns. The present study was carried out on a Nicotiana genetic system consisting of the tumorous amphidiploid N glauca X N langsdorffii, a nontumorous mutant of it, their F~1~, and a backcross to the tumorous parent. Backcross segregation ratios were shown to be compatible with a “single gene” hypothesis, the F~1~ plant being nontumorous but showing a low percentage of tumors induced by wounds, 6‐azauracil or X‐rays. In vitro studies of excised pith tissue grown on Linsmaier and Skoog medium for different periods of time showed the presence, confirmed by cytological analyses, of amplification of highly repetitive sequences only in the nontumorous stock, as judged by reassociation experiments in the first 24–96 hours of culture. CsCl analytical ultracentrifugation of those sequences showed the appearance in the same stock of a heavy DNA sate
Who reads DNA heterogeneity and genetic control of tumorigenesis in nicotiana tumorous and nontumorous genotypes?
It is typically read by researchers, students, and practitioners in Biochemistry, Genetics and Molecular Biology.
- Author
- Mauro Durante; Chiara Geri; Marcello Buiatti; Sergio Baroncelli; Roberto Parenti; Vittoria Nuti Ronchi; Guido Martini; Fulvio Collina Grenci; Janine Grisvard; Etienne Guillé
- Publisher
- John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0192-253X)
- Published
- 1982
- Language
- EN
- Field
- Biochemistry, Genetics and Molecular Biology (Life Sciences)