Sesbania bispinosa, a new host of a begomovirus-betasatellite complex in Pakistan

Abstract

Symptoms of severe leaf curling, yellowing and vein thickening, typical of begomovirus infection, were observed on Sesbania bispinosa grown in cotton leaf curl disease affected cotton fields in Pakistan. A begomovirus and its associated betasatellite were amplified and sequenced from these affected plants. Complete nucleotide sequence showed that a monopartite begomovirus named Pedilanthus leaf curl virus (PeLCV) is associated with the disease and it shared highest sequence identity (98.73%) with a clone previously reported from soybean. Characterization of the betasatellite showed that it had highest sequence identity (96-97%) with Tobacco leaf curl betasatellite (TbLCB), previously isolated from soybean. Our data shows the expansion of the host range of begomovirus-betasatellite complexes. To the best of our knowledge, this is the first occurrence of PeLCV and TbLCB on S. bispinosa.