Metallic nanoparticles have antimicrobial, virucidal, and anticancer activities and have been widely applied in medicine. In plants, silver nanoparticles have been used as preventive treatments in the greenhouse to reduce viral titers and symptoms. This work investigates the effect of Argovit™ AgNP formulation on apricot plants infected with Plum pox virus or with Hop stunt viroid. Meristems were rescued from plants treated with different Argovit™ concentrations and two exposure times. Although viroid-free plants were not obtained, a very high efficiency in eliminating the sharka virus is reported with a maximum cleaning efficiency (75 %) after 8 weeks of exposure at 75 mg L AgNP. To the best of our knowledge, this is the first time that silver nanoparticles application is used, combined with meristem culture, to produce virus-free plants and opens a new path to the elimination of viruses from plants.
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| http://dx.doi.org/10.1016/j.plantsci.2024.112358 | DOI Listing |
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Viral coat proteins decrease the gene silencing activity of cognate and heterologous viral suppressors.
Sci Rep
December 2024
Department of Plant Pathology, Plant Protection Institute, Centre for Agricultural Research, HUN-REN, Budapest, Hungary.
Plant viruses have evolved different viral suppressors of RNA silencing (VSRs) to counteract RNA silencing which is a small RNA-mediated sequence-specific RNA degradation mechanism. Previous studies have already shown that the coat protein (CP) of cucumber mosaic virus (CMV) reduced RNA silencing suppression (RSS) activity of the VSR of CMV, the 2b protein. To demonstrate the universality of this CP-VSR interference, our study included three different viruses: CMV and peanut stunt virus (PSV) from the Bromoviridae, and plum pox virus (PPV) from the Potyviridae family.
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CREA Research Centre for Plant Protection and Certification, Via C.G. Bertero 22, 00156 Rome, Italy.
Plum pox virus (PPV) is the etiological agent of sharka, the most important viral disease of stone fruit worldwide. In this study, a one-step reverse transcription real-time PCR test (RT-qPCR) was modified and translated as a one-step RT-droplet digital PCR (RT-ddPCR) for sensitive, direct, and accurate detection and quantification of PPV. The modified RT-qPCR and RT-ddPCR PPV detection tests were validated using both plant purified total RNA (TRNA) and crude extract as templates.
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Group of Fruit Tree Biotechnology, Department of Plant Breeding, CEBAS-CSIC, Campus de Espinardo, Edif. 25, Murcia 30100, Spain. Electronic address:
Metallic nanoparticles have antimicrobial, virucidal, and anticancer activities and have been widely applied in medicine. In plants, silver nanoparticles have been used as preventive treatments in the greenhouse to reduce viral titers and symptoms. This work investigates the effect of Argovit™ AgNP formulation on apricot plants infected with Plum pox virus or with Hop stunt viroid.
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Centro Nacional de Biotecnología (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain.
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View Article and Find Full Text PDFAdaptive substitutions at two amino acids of HCPro modify its functional properties to separately increase the virulence of a potyviral chimera.
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Department of Microbial and Plant Biotechnology, Margarita Salas Center for Biological Research (CIB), Spanish National Research Council, CSIC, Madrid, Spain.
We had previously reported that a plum pox virus (PPV)-based chimera that had its P1-HCPro bi-cistron replaced by a modified one from potato virus Y (PVY) increased its virulence in some Nicotiana benthamiana plants, after mechanical passages. This correlated with the natural acquisition of amino acid substitutions in several proteins, including in HCPro at either position 352 (Ile→Thr) or 454 (Leu→Arg), or of mutations in non-coding regions. Thr in position 352 is not found among natural potyviruses, while Arg in 454 is a reversion to the native PVY HCPro amino acid.
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