Fecha de publicación: -- Fuente: WIPO "tomato" Synthetic endornavirus satellite RNA molecules and satellite particles containing the same are disclosed. Synthetic endornavirus satellite RNA molecules which contain internal heterologous TNA virus (HRV) amplicons are also disclosed. Also disclosed are methods of using the endornavirus satellite RNA molecules and satellite particles containing the same to change plant phenotypes, improve plant stress resistance, and improve plant pest and pathogen resistance.