chapter  6
Seed Transmission of Viruses: Biological and Molecular Insights
ByJawaid A. Khan, Jeanne Dijkstra
Pages 22

Seeds provide an ideal medium for the survival of viruses, especially when suitable host plants are in short supply. Irrespective of their transmission frequency, which may vary from less than I percent to 100 percent, seed-transmitted viruses have significant impact on disease epidemics. A low rate of virus transmission coupled with secondary spread by animal vectors may lead to disease epidemics in a new area, while a high rate of transmission may cause virus self-extinction as a result of poor development of flowers and seeds. More than 100 plant viruses are reported to have seed-based transmission (Mink. 1993: Van den Heuvel et al.. 1999).