Different propagation levels of potato virus X (PVX) isolates in PVX coat protein expressing tobacco plants and protoplasts do not correlate with coat protein sequence similaritiesTruve, Erkki; Järvekülg, Lilian; Bouscaren, Marie-Lise; Aaspõllu, Anu; Priimägi, Andres; Saarma, MartArch. phytopath. pflanz1995 / 30, p. 15-30: ill