Two surprising and potentially useful phenomena of transgenic plants originated from two
distinct lines of research but may converge in underlying mechanism or mechanisms (1–3) …

Genetic engineering of virus resistance in plants may be conferred by transgenes based on
sequences from the viral genome. In many instances the underlying mechanism involves the …

Grafting experiments have revealed that transgenic plants that undergo co-suppression of
homologous transgenes and endogenous genes or PTGS of exogenous transgenes …

In genetically modified plants, the introduced transgenes are sometimes not expressed.
They can be silenced. Transgenes can also cause the silencing of endogenous plant genes …

Gene silencing in transgenic plants has emerged in the last 5 years as a topic of intense
interest for both applied and basic plant scientists. From the applied side, gene silencing has …

The recent development of gene transfer methods for almost all eukaryotes has revealed
that transgenes can undergo silencing after integration in the genome. Host genes can also …

The use of viral sequences to produce virus-resistant plants is now almost a standard
technique. A variety of sequences from a large number of viruses have been used but the …

Epigenetic silencing is a natural phenomenon in which the expression of genes is regulated
through modifications of DNA, RNA, or histone proteins. It is a mechanism for defending host …

Many examples of extreme virus resistance and posttranscriptional gene silencing of
endogenous or reporter genes have been described in transgenic plants containing sense …

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