Potato, an experimental and natural host of the crinivirus Tomato chlorosis virus
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Abstract
Tomato chlorosis virus (ToCV, genus Crinivirus, family Closteroviridae) causes yellowing of tomatoes in many countries worldwide. Symptoms of ToCV infections in tomatoes include inter-veinal yellow chlorotic areas that develop first on lower leaves and then advance towards the upper part of the plant. ToCV is transmitted in nature by the whiteflies Bemisia tabaci, Trialeurodes vaporariorum, and Trialeurodes abutilonea in a semi-persistent manner. In the summer of 2006, a few potato (Solanum tuberosum) volunteer plants heavily infested with the whitefly B. tabaci were found growing within a pepper crop in the province of Málaga, southern Spain. Leaf samples from volunteer plants were tested for the presence of ToCV by molecular hybridization and RT-PCR, and were shown to be infected. Furthermore, potato plants were readily infected by ToCV after experimental transmission using B. tabaci biotype Q as vector. ToCV was also detected in the tubers from infected plants that subsequently produced infected plants. Potato also served as virus source for tomato infection via B. tabaci transmission.
Keywords
Bemisia tabaci Closteroviridae Crinivirus Host range Potato Solanum tuberosum Tomato chlorosis virus Whitefly transmissionNotes
Acknowledgments
This work was supported by grants P08-AGR-04045 from Consejería de Economía, Innovación y Ciencia, Junta de Andalucía, Spain (CEIC) and AGL2010-22287-C02-01 ⁄AGR from Ministerio de Ciencia e Innovación, Spain (MICINN), both cofinanced by FEDER-FSE. J.N.C. is member of the Research Group AGR-214, partially funded by CEIC. I.M.F. was recipient of a fellowship from MICINN.
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