BACKGROUND Small RNA (sRNA)-guided RNA silencing is a critical antiviral defense mechanism employed by a variety of eukaryotic organisms. Although the induction of RNA silencing by bipartite and monopartite begomoviruses has been described in plants, the nature of begomovirus/betasatellite complexes remains undefined. METHODOLOGY/PRINCIPAL FINDINGS Solanum lycopersicum plant leaves systemical...

TAXONOMY Bean dwarf mosaic virus-[Colombia:1987] (BDMV-[CO:87]) is a single-stranded plant DNA virus, a member of the genus Begomovirus of the family Geminiviridae. PHYSICAL PROPERTIES BDMV virions are twinned incomplete isosahedra measuring 18 x 30 nm. The viral particle is composed of 110 subunits of coat protein, organized as 22 pentameric capsomers. Each subunit has a molecular mass of ap...

Castor bean (Ricinus communis) is a member of the family Euphorbiaceae and native to tropical regions. The seed source castor oil which has variety pharmaceutical industrial uses. In India, used in alternative medicine as laxative, purgative, for curing arthritis. affected by pathogens, both fungal (Karan, 1966) viral, including Cucumber mosaic virus (Raj et al., 2010) Olive latent 2 (Grieco 20...

Geminiviruses represent one of the major groups of phytopathogens of many economically important crops worldwide. In Trinidad, Potato yellow mosaic virusTrinidad isolate (PYMV-TT) has been implicated as the causal agent of disease epidemics in tomato since the late 1980s. Since its detection there has been an increase both in disease incidence and in geographical distribution among commercial t...

The begomoviruses (family Geminiviridae) associated with cotton leaf curl disease (CLCuD) pose a major threat to cotton productivity in South-East Asia including Pakistan and India. These viruses have single-stranded, circular DNA genome, of ∼2800 nt in size, encapsidated in twinned icosa-hedera, transmitted by ubiquitous whitefly and are associated with satellite molecules referred to as alpha...