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Artificially induced phased siRNAs promote virus resistance in transgenic plants.

08:00 EDT 31st August 2019 | BioPortfolio

Summary of "Artificially induced phased siRNAs promote virus resistance in transgenic plants."

We previously developed transgenic tobacco plants that were resistant to two geminiviruses. We generated resistance using RNAi constructs that produced trans-acting siRNA (tasiRNA) like secondary siRNAs known as phased siRNA (phasiRNA) that targeted several regions of Tomato Leaf Curl New Delhi Virus (ToLCNDV) and Tomato Leaf Curl Gujarat Virus (ToLCGV) transcripts encoding the RNA silencing suppressor proteins AC2 and AC4. Here, we performed degradome analysis to determine the precise cleavage sites of RNA-RNA interaction between phasiRNA and viral transcripts. We then applied our RNAi technology in tomato, which is the natural host for ToLCNDV and ToLCGV. The relative ease of developing and using phasiRNA constructs represents a significant technical advance in imparting virus resistance in crops and/or important model systems.

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This article was published in the following journal.

Name: Virology
ISSN: 1096-0341
Pages: 208-215

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Medical and Biotech [MESH] Definitions

Artificially induced UTERINE CONTRACTION. Generally, LABOR, OBSTETRIC is induced with the intent to cause delivery of the fetus and termination of pregnancy.

Small double-stranded, non-protein coding RNAs (21-31 nucleotides) involved in GENE SILENCING functions, especially RNA INTERFERENCE (RNAi). Endogenously, siRNAs are generated from dsRNAs (RNA, DOUBLE-STRANDED) by the same ribonuclease, Dicer, that generates miRNAs (MICRORNAS). The perfect match of the siRNAs' antisense strand to their target RNAs mediates RNAi by siRNA-guided RNA cleavage. siRNAs fall into different classes including trans-acting siRNA (tasiRNA), repeat-associated RNA (rasiRNA), small-scan RNA (scnRNA), and Piwi protein-interacting RNA (piRNA) and have different specific gene silencing functions.

A unisexual reproduction without the fusion of a male and a female gamete (FERTILIZATION). In parthenogenesis, an individual is formed from an unfertilized OVUM that did not complete MEIOSIS. Parthenogenesis occurs in nature and can be artificially induced.

Vaccines or candidate vaccines derived from edible plants. Transgenic plants (PLANTS, TRANSGENIC) are used as recombinant protein production systems and the edible plant tissue functions as an oral vaccine.

A phenomenon in which infection by a first virus results in resistance of cells or tissues to infection by a second, unrelated virus.

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