Tomato yellow vein streak: a new bigeminivirus of tomato in Brazil
Near Campinas, State of São Paulo, Brazil, symptoms were observed in tomato fields. Approximately, 20 % of young tomato plants showed yellow streaking of veins on the apical shoots. Bemisia tabaci (EPPO A2 quarantine pest) was able to transmit a pathogen from infected tomato plants to healthy tomato and potato plants, reproducing the original symptoms in tomato. On potato, the apical leaves showed yellow or green mottle which developed into leaf distortion with yellow blotches. The authors noted that these symptoms are similar to those caused by potato deforming mosaic disease. Molecular studies showed that the causal agent found in both tomato and potato plants is a bipartite bigeminivirus (bipartite geminivirus subgroup III) which is distinct from tomato mottle, bean golden mosaic (both EPPO A1 quarantine pests) and tomato yellow leaf curl (EPPO A2 quarantine pest) bigeminiviruses. The name tomato yellow vein streak bigeminivirus has therefore been proposed for this new virus.
Sources
Faria, J.C.; Souza, J.A.C.; Slack, S.A.; Maxwell, D.P.; (1997) A new geminivirus associated with tomato in the State of São Paulo, Brazil.
Plant Disease, 81(4), p 423.