Dynamics of GFLV, GFkV, GLRaV-1, and GLRaV -3 grapevine viruses transport toward developing tissues

Abstract Viral diseases in grapevine cause large economic losses due to decreased irregular yield and unbalanced ripening, can even lead plant mortality. There is a number of viral agents, few them have prominent impact their worldwide distribution, virulence, incidence. Although previous research has evaluated variations load between organs time since infection, there still lack knowledge on how the viruses are transported toward developing tissues. In this work, we present results two experiments that contribute understanding spread dynamics four major (GFLV, GFkV, GLRaV-1, GLRaV -3). Bud leaf tissues were sampled from shoots obtained cv. ‘Garnacha’ cuttings known be infected with one these viruses. samples taken at early development stages used understand short-distance transport, while leaves young represented long-distance driven mainly through phloem. Our show all able invade beginning development. The dissemination ability GFLV was considerable, as detected high dormant shoot. Furthermore, for it shown does not follow general assumption older accumulating higher but, conversely, closer shoot tip might by sink strength.