Soilborne viruses: advances in virus movement, virus induced gene silencing, and engineered resistance
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Until recently soilborne plant viruses were considered important only because they are causative agents for agricultural diseases. In recent years, soilborne plant viruses have played a significant role in advancing research into mechanisms of plasmodesmata transport, gene silencing, and engineered resistance to plant pathogens. Three different mechanisms by which viruses move through plasmodesmata have been identified using dianthoviruses, nepoviruses, and benyviruses. The infectious clone of the tobravirus Tobacco rattle virus (TRV) has become an important tool for studying virus induced gene silencing and may be a tool to silence meristematic gene expression. Investigations of soilborne viruses may enable the development of new strategies for control of soilborne diseases. The potential use of pathogen-derived resistance to control soilborne viruses is currently being explored in several laboratories. © 2003 Elsevier Science Ltd. All rights reserved.
Physiological and Molecular Plant Pathology
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