Physalis ixocarpa and P. peruviana, new natural hosts of Tomato chlorosis virus
Tomato chlorosis virus causes yellow leaf disorder epidemics in many countries worldwide. Plants of Physalis ixocarpa showing abnormal interveinal yellowing and plants of Physalis peruviana showing mild yellowing collected in the vicinity of tomato crops in Portugal were found naturally infected with ToCV. Physalis ixocarpa and P. peruviana were tested for susceptibility to ToCV by inoculation with Bemisia tabaci, Q biotype. Results confirmed that ToCV is readily transmissible to both species. The infection was expressed in P. ixocarpa by conspicuous interveinal yellow areas on leaves that developed into red or brown necrotic flecks, while P. peruviana test plants remained asymptomatic. Infected plants of both P. ixocarpa and P. peruviana served as ToCV sources for tomato infection via B. tabaci transmission. This is the first report of P. ixocarpa and P. peruviana as natural hosts of ToCV.
KeywordsToCV Host Physalis
We thank M.T.R.D.T. Santos and E. Moriones for critical reading of the manuscript. This research was funded by grant AGL2004-06959-C04-01/AGR (Plan Nacional de I+D+I, Spain), and CSIC-GRICES bilateral project 2004PT0011 between Spain and Portugal. Helena P. Trenado is recipient of a CSIC fellowship (PIE 2004-4-OE-119). Isabel M. Fortes is recipient of a FPI fellowship from the Ministerio de Educación y Ciencia, Spain.
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