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Economy of the Virus-Vector-Plant Relationship
The relationship between virus, vector insect and its host plant has been studied in epidemic of virus disease, fitnessof vector insect, symbiosis and phylogenesis of the relationship, etc. The biological association, symbiosis, concept hasbeen suggested on the virus-vector relationship since 2000. We have conducted such a typical study with the Rice stripevirus and the small brown planthopper, Laodelphax striatellus. In addition, it is able to extend our view to ecosystemservice of the relationship. We reviewed the trophic efficiency included with virus factor. Nutrient loss of the host plantby virus is negative effect but terrestrial decomposition by the virus may be positive feedback in ecosystem. Thus, thevirus-vector relationship is able to be understand not only as competition for the host plant’s nutrition but also as indirectmutualism for the efficient utilization of the host plant or fitness to environmental conditions, especially climate change.
