Defense response to viral single and mixed infections by pepper golden mosaic virus and tobacco mosaic virus in Capsicum chinense Jacq. treated with titanium dioxide nanoparticles
Mónica Roció Sánchez Tovar, Ireri Alejandra Carbajal Valenzuela, Pablo Luis Godínez Mendoza, Rafael F. Rivera Bustamante, Diana L. Saavedra Trejo, Ramon Gerardo Guevara González, Irineo Torres Pacheco
Te invitamos a leer el artículo "Defense response to viral single and mixed infections by pepper golden mosaic virus and tobacco mosaic virus in Capsicum chinense Jacq. treated with titanium dioxide nanoparticles" publicado en "Physiological and Molecular Plant Pathology" en el que colaboró la Diana Lilia Saavedra Trejo de Cinvestav Irapuato.
Autores:
Mónica Roció Sánchez Tovar, Ireri Alejandra Carbajal Valenzuela, Pablo Luis Godínez Mendoza, Rafael F. Rivera Bustamante, Diana L. Saavedra Trejo, Ramon Gerardo Guevara González, Irineo Torres Pacheco
Resumen:
Problems affecting the agricultural sector include the incidence of viral diseases, which affect quality and yield and cause economic losses to farmers. Viral diseases can occur in mixed infections, when two or more viruses simultaneously attack a host, causing more severe symptoms and continually reoccurring in the plant. As alternatives to manage this type of infection, the use of mechanical nanoparticles, such as titanium dioxide, has been proposed, as it exhibits photocatalytic, eliciting, antiviral, and thermally stable activity. Regarding the antiviral activity of TiO2, its primary mechanisms include: RNA degradation for the destruction of the capsid, inactivation of viral particles, blocking of viral DNA or RNA replication, reduction or inhibition of viral infection, and generation of reactive oxygen species (ROS). Chili peppers are one of the most consumed vegetables worldwide for their spicy flavor, with the habanero type (Capsicum chinense Jacq.) being one of the most marketed chili peppers because it is considered one of the most spicy in the world. However, it is susceptible to viral diseases such as those caused by the pepper golden mosaic virus (PepGMV) and tobacco mosaic virus (TMV). These viruses can cause losses of up to 100 % depending on either the management of the crop or whether the infection is single or mixed. Therefore, this research aimed to evaluate the effect of titanium dioxide nanoparticles (TiO2 NPs) on the management of single and mixed infections with the pepper golden mosaic virus (PepGMV) and tobacco mosaic virus (TMV) in habanero chili plants. On one hand, when applying TiO2 NPs at 150 μg/mL in habanero chili plants infected with PepGMV and TMV, a significant decrease in the individual infection of TMV was observed. On the other hand, interestingly, the habanero plant in mixed infection displayed reduced symptom severity, stimulated plant development, and triggered POD, SOD, PAL, and phenolic content, suggesting an induced defense response.