Published in:
01-03-2012 | Original Article
A survey of geminiviruses and associated satellite DNAs in the cotton-growing areas of northwestern India
Authors:
Valerio Zaffalon, Sunil Kumar Mukherjee, Vanga Siva Reddy, Jeremy R. Thompson, Mark Tepfer
Published in:
Archives of Virology
|
Issue 3/2012
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Abstract
Severe symptoms of cotton leaf curl disease (CLCuD) are caused by the association of a single-stranded circular DNA satellite (betasatellite) with a helper begomovirus. In this study, we analyzed 40 leaf samples (primarily cotton with CLCuD symptoms and other plants growing close by) from four sites between New Delhi and the Pakistan/India border, using rolling-circle amplification (RCA) and PCR. In total, the complete sequences of 12 different helper viruses, eight alphasatellites, and one betasatellite from five different plant species were obtained. A recombinant helper virus molecule found in okra and a novel alphasatellite-related DNA from croton are also described. This is the first report of the presence of both DNA components (helper virus and betasatellite) associated with resistance-breaking CLCuD in India, and it highlights the need for further work to combat its damage and spread.