Abstract
Expressing insecticidal double-stranded RNA (dsRNA) molecules in plant plastids is a novel approach for in planta production of dsRNA that has enormous potential for developing improved plant-mediated RNA interference (RNAi) strategies for insect pest control. In this chapter, we describe the design of a transformation vector containing an expression cassette which can be used to stably transform plastids of tomato plants for production and accumulation of dsRNA . Such dsRNA can trigger the mechanisms of RNAi in pest insects and selectively suppress the expression of target genes, resulting in lethality. We also describe a protocol for detection of full-length dsRNA molecules in plastids using an RT-PCR-based method.
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