Mathematical model of plant-virus interactions mediated by RNA interference

Neofytou, G, Kyrychko, Y N and Blyuss, K B (2016) Mathematical model of plant-virus interactions mediated by RNA interference. Journal of Theoretical Biology, 403. pp. 129-142. ISSN 0022-5193

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Abstract

Cross-protection, which refers to a process whereby artificially inoculating a plant with a mild strain provides protection against a more aggressive isolate of the virus, is known to be an effective tool of disease control in plants. In this paper we derive and analyse a new mathematical model of the interactions between two competing viruses with particular account for RNA interference. Our results show that co-infection of the host can either increase or decrease the potency of individual infections depending on the levels of cross-protection or cross-enhancement between different viruses. Analytical and numerical bifurcation analyses are employed to investigate the stability of all steady states of the model in order to identify parameter regions where the system exhibits synergistic or antagonistic behaviour between viral strains, as well as different types of host recovery. We show that not only viral attributes but also the propagating component of RNA-interference in plants can play an important role in determining the dynamics.

Item Type: Article
Keywords: Plant immune system, Mathematical model, Cross-protection, RNA interference
Schools and Departments: School of Mathematical and Physical Sciences > Mathematics
Subjects: Q Science > QA Mathematics
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Depositing User: Konstantin Blyuss
Date Deposited: 07 Jun 2016 10:54
Last Modified: 22 May 2017 23:38
URI: http://sro.sussex.ac.uk/id/eprint/61348

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