Efficient silencing gene construct for resistance to multiple common bean (Phaseolus vulgaris L.) viruses.

3 Biotech
Abdolbaset AziziMasoud Shams-Bakhsh

Abstract

One promising strategy to engineer plants that are resistant to plant pathogens involves transforming plants with RNA silencing constructs for resistance to multiple pathogens. Garden bean is significantly damaged by bean common mosaic virus (BCMV), bean common mosaic necrosis virus (BCMNV) and cucumber mosaic virus (CMV). In this study, we prepared constructs producing sense, antisense and hairpin RNA (hpRNA) structures to target single as well as multiple viruses. Silencing efficiency of these constructions was analyzed using Agrobacterium (GV3101) transient expression in Nicothinia bethamiana and Phaseolus vulgaris plants. The results showed significantly reduced disease symptoms and virus accumulation in N. bethamiana plants. Generally, the efficiency of the prepared constructs was hairpin, antisense and sense, respectively, and also, there was a significant difference between mono-gene and multiple-gene constructs for reducng virus accumulation and the multiple-gene constructs showed higher effectiveness. Experiments in this study showed that using Agrobacterium harboring binary constructs containing a Caenorhabditis elegans gene, Ced-9, or a plant gene, AtBag-4, anti-apoptosis gene as a mix suspension with an Agrobacteriu...Continue Reading

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