Abstract

RNA interference (RNAi), also known as post-transcriptional gene silencing (PTGS), is one of the emerging genetic engineering techniques to effectively silence or inhibit the expression of target genes. This chapter describes a method for in vivo production of dsRNA in non-pathogenic Pseudomonas syringae strains using phage ϕ6 RNA-dependent RNA polymerase, extraction and purification of dsRNA from bacterial solution, and the use of dsRNA to induce silencing of green fluorescent protein (GFP) in transgenic Nicotiana benthamiana.

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