Fitopatologia Brasileira (2004) 29, 307-311

Addolorata Colariccio, Marcelo Eiras, Alexandre L.R. Chaves, Ricardo Harakava and César M. Chagas (2004)
Tomato chlorotic spot virus in hydroponically-grown lettuce in São Paulo State, Brazil
Fitopatologia Brasileira 29 (3), 307-311
Abstract: In the regions of Campinas and Sumaré, São Paulo, Brazil, hydroponically grown crops of Lettuce (Lactuca sativa) cv. Verônica, which showed virus-like symptoms were examined by electron microscope, biological, serological and molecular tests. Pleomorphic, enveloped particles (80-100 nm in diameter) were always detected in these samples. Experimentally inoculated host plants, including lettuce, reacted with tospoviruses-induced symptoms. Some differences were observed in Gomphrena globosa, which reacted by showing local lesions and systemic mosaic. Two isolates of Tomato chlorotic spot virus (TCSV) were identified by DAS-ELISA and by RT-PCR. The sequencing and alignment of the RT-PCR coat protein amplified fragments have indicated a high degree of homology with the TCSV sequences stored in the GenBank. This is the first report of losses due to a virus from the genus Tospovirus in commercial hydroponic lettuce crops in Brazil. Further epidemiological studies are needed for better understanding the spread of the virus in hydroponic crops, since Tomato spotted wilt virus (TSWV) is reported to spread through the nutritive solution.
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Database assignments for author(s): Addolorata Colariccio, César M. Chagas, Marcelo Eiras

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Orthotospovirus tomatoflavi	Lettuce (Lactuca)	Brazil (south)