The ViroiDoc - Advanced Research on Viroid Pathogenesis and Control for Agricultural Sustainability project is coordinated by the University of Ljubljana and funded by the European Union within the Horizon Europe MSCA Doctoral Networks, Reference Number HORIZON-MSCA-2023-DN-01-01, Marie Curie Grant Agreement Number: 101169421. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or European Research Executive Agency. Neither the European Union nor the granting authority can be held responsible for them.