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Improved double-stranded RNAs for nanocomposite-driven SIGS in plant virus control

Project description

Nanotech sprays to stop crop viruses

Tomato and cucumber farmers face a growing threat from fast-spreading plant viruses that devastate harvests and strain global food supplies. Traditional solutions, such as breeding resistant varieties or using pesticides, are either too slow or environmentally harmful. Supported by the Marie Skłodowska-Curie Actions programme, the IMPROVIR project explores spray-induced gene silencing (SIGS). This method uses double-stranded RNA molecules, sprayed onto plants, to switch off viral genes without genetic modification. Specifically, the research enhances RNA molecules with mobility tags and packages them into nanocomposites made of carbon dots or chitosan for greater stability and delivery. The goal is an eco-friendly alternative to pesticides that could protect tomatoes, peppers, and cucurbits from destructive viral outbreaks.

Objective

IMPROVIR is an interdisciplinary project combining nanotechnology, plant molecular biology, and plant virology to control two
damaging and emerging plant viruses, Tomato brown rugose fruit virus (ToBRFV) and Cucurbit chlorotic yellows virus (CCVY) via an
environment-friendly approach called spray-induced gene silencing (SIGS). Currently, these two viruses are threatening production of
tomato, pepper and cucurbits across the globe especially in Europe. SIGS approach is based on RNA-interference (RNAi) technology
but it does not involve transgenic manipulation of the plants. The non-transgenic approach of SIGS is an innovative strategy that
relies on topical spraying of double stranded RNAs (dsRNAs) on plant surface that enter plant cells and tissues and eventually induce
gene silencing by the RNAi mechanism against specific plant pathogens and pests. We will improve the dsRNAs molecules for SIGS by
using a tRNAMet tag to enhance dsRNA mobility in the plant. Besides, the enhanced dsRNA molecules will be incorporated into either
carbon dot or chitosan-derived nanoparticles in the form of nanocomposites to: (1) increase the stability of the dsRNAs on plant
surfaces and (2) increase the delivery of dsRNAs into plants. This approach is fast (compared to time-consuming approaches such as
plant breeding, genetic transformation and introduction of resistant varieties), environment-friendly (no residue in products and in
environment as opposed to chemical pesticides) and publicly acceptable (no need for genetic transformation and modification). The
performance of the dsRNA:NP nanocomposites in controlling those virus diseases will be assessed by evaluating disease progress,
virus titers and siRNA production in treated vs. non-treated infected plants. In a non-academic placement at Kimitec, a private biotech
company in Spain, the technologies developed at IFAPA (host institution) during the project will be applied to control another
important plant pathogen, Phytophthora sp.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2024-PF-01

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Coordinator

INSTITUTO ANDALUZ DE INVESTIGACIONY FORMACION AGRARIA PESQUERA ALIMENTARIA Y DE LA PRODUCCION ECOLOGICA
Net EU contribution
€ 262 393,20
Address
AVENIDA GRECIA S/N EDF ATVO LOS BERMEJALES
41012 Sevilla
Spain
Region
Sur Andalucía Sevilla
Activity type
Research Organisations
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Total cost
No data

Partners (1)