Virus-Resistant Transgenic Plants: Potential Ecological Impact

✍ Scribed by Mark J. Gibbs, John Armstrong (auth.), Dr. Mark Tepfer, Dr. Ervin Balázs (eds.)

• Publisher: Springer-Verlag Berlin Heidelberg
• Year: 1997
• Tongue: English
• Leaves: 140
• Edition: 1
• Category: Library

✦ Synopsis

The introduction of novel genes into plants by genetic transformation holds great promise for plant breeding, and many crop species have been rendered virus-resistant by expression of viral sequences. However, it is essential to also evaluate the potential risks associated with this new technology. Among the types of genetically modified plants that could represent potential ecological risks, ones expressing viral sequences pose questions of particular interest. In this volume special attention is given to recombination in plants expressing sequences of RNA or DNA viruses, heterologous encapsidation or other forms of complementation in plants expressing coat protein genes, potential deleterious effects of satellite RNAs associated with cucumber mosaic virus, and sexual transmission of virus resistance genes to potentially weedy relatives.

✦ Table of Contents

Front Matter....Pages I-XV
Virus Evolution; the Past, a Window on the Future?....Pages 1-19
Systematic Search for Recombination Events in plant Viruses and Viroids....Pages 20-25
Different Mechanisms of Homologous and Nonhomologous Recombination in Brome Mosaic Virus, a Model Plant RNA Virus....Pages 26-32
Studies on RNA Recombination in vivo and in vitro ....Pages 33-39
Significance of RNA Recombination in Capsid Protein-Mediated Virus-Resistant Transgenic Plants....Pages 40-44
Transgenic Plants Expressing Viral Sequences Create a Favourable Environment for Recombination Between Viral Sequences....Pages 45-51
Behavior of Cucumovirus Pseudorecombinant and Recombinant Strains in Solanaceous Hosts....Pages 52-65
Recombination Between Cauliflower Mosaic Virus and Transgenic Plants that Contain CaMV Transgenes : Influence of Selection Pressure on Isolation of Recombinants....Pages 66-76
Synergy of Virus Accumulation and Pathology in Transgenic Plants Expressing Viral Sequences....Pages 77-84
Risk Assessment of Transgenic Plants Expressing the Coat Protein Gene of Plum Pox Potyvirus (PPV)....Pages 85-93
Mixed Infections and Genetic Exchange Occur in Natural Populations of Cucumber Mosaic Cucumovirus....Pages 94-99
The Potential of a Beneficial Satellite RNA of Cucumber Mosaic Cucumovirus to Acquire Deleterious Functions : Nature Versus Greenhouses....Pages 100-106
Ecological Impact of Transgenic Virus-Resistance in Crop, Weed, and Wild Plant Populations (Due to Potential Alterations of Plant Invasiveness)....Pages 107-113
Risk Assessment of Gene Flow Associated with the Release of Virus-Resistant Transgenic Crop Plants....Pages 114-120
Concluding Remarks and Recommendations....Pages 121-123
Back Matter....Pages 125-126

✦ Subjects

Genetic Engineering; Agriculture; Plant Pathology; Plant Sciences; Forestry; Cell Biology