PMID: 11607156Mar 1, 1991Paper

Transformation of a partial nopaline synthase gene into tobacco suppresses the expression of a resident wild-type gene

Proceedings of the National Academy of Sciences of the United States of America
D R GoringS J Rothstein

Abstract

A portion of the nopaline synthase gene under the control of the cauliflower mosaic virus 35S promoter was used to transform a tobacco plant that had previously been transformed with a wild-type nopaline synthase (nos) gene. Unexpectedly, in all nine primary transformants tested the wild-type nos expression was virtually completely suppressed. In contrast, plants transformed with the control vector DNA, which differed only in the absence of the partial nos gene, did not show any inhibition of nos expression. Progeny plants were analyzed for the stability of the gene-silencing phenotype. All of the progeny that carried both the wild-type and partial nos genes had no detectable nopaline synthase activity. In addition, wild-type nos mRNA could not be detected in these plants. In most plants in which the wild-type gene was segregated away from the partial nos gene, wild-type levels of activity were detected. Although DNA methylation has been shown to be correlated with a decrease in promoter activity in plants, none of the progeny appeared to carry a methylated nos promoter. The underlying mechanism causing this gene suppression phenomenon is unclear at this time.

References

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Mar 1, 1986·Proceedings of the National Academy of Sciences of the United States of America·V L Chandler, V Walbot
Jul 1, 1983·Analytical Biochemistry·A P Feinberg, B Vogelstein
Dec 1, 1987·Proceedings of the National Academy of Sciences of the United States of America·S J RothsteinD Rice

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Citations

Sep 1, 1993·Plant Molecular Biology·F F AssaadE R Signer
Jan 1, 1996·Archives of Virology·M Prins, R Goldbach
Oct 1, 1992·Plant Physiology·S G Gottlob-McHughD T Dennis
Jun 1, 1996·Annual Review of Plant Physiology and Plant Molecular Biology·P. Meyer, H. Saedler
Aug 5, 2005·Annual Review of Phytopathology·John A Lindbo, William G Dougherty
Jan 1, 1994·Antonie van Leeuwenhoek·C CogoniG Macino
Sep 17, 2015·Plant Biotechnology Journal·David W Ow
Jul 1, 1992·Molecular & General Genetics : MGG·S H RussellJ T Odell
Jan 1, 1992·Antisense Research and Development
Aug 2, 1994·Molecular & General Genetics : MGG·F NeuhuberM A Matzke
Sep 1, 1998·The Plant Journal : for Cell and Molecular Biology·Andrew J HamiltonDon Grierson
Mar 1, 1997·Applied and Environmental Microbiology·S H LiangJ E Linz

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